Acousto-Optic Devices ······················PageMagneto-Optic Devices Faraday...
Transcript of Acousto-Optic Devices ······················PageMagneto-Optic Devices Faraday...
CASTECH®
Magneto-Optic Devices ····················Page.01Faraday Rotators ······················································Page.02
Free Space Isolators ··················································Page.04
Fiber To Free Space Isolators ········································Page.08
In-Line Isolators ·······················································Page.11
Optical Circulators ····················································Page.14
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Contents
Acousto-Optic Devices ······················Page.16AO Q-Switches ·························································Page.17
AO Modulators ·························································Page.20
AO Frequency Shifters ················································Page.23
AO Deflectors ··························································Page.25
RF Drivers ······························································Page.27
Electro-Optic Devices ·······················Page.31BBO Pockels Cells ····················································Page.32
KD*P Pockels Cells ···················································Page.36
Pockels Cells Drivers ·················································Page.38
Laser Application Devices ··················Page.40Fiber Collimators ······················································Page.41
F-Theta Lenses ························································Page.43
Beam Expanders ·······················································Page.45
Attenuators ······························································Page.47
01
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Magneto-Optic Devices
Faraday Rotators
Free Space Isolators
Fiber To Free Space Isolators
In-Line Isolators
Optical Circulators
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Product Introduction
Faraday rotator provides non-reciprocal rotation while maintaining linear
polarization. That is, the polarization rotation due to the Faraday rotator is always in
the same relative direction. When the light transmission through the rotator that is face
to the forward direction, it will cause the positive rotation of 45°, or if the light face to
the reverse direction, it will cause the negative rotation of 45°. This is due to the
change in the relative magnetic field direction, positive one way, negative the other.
This then adds to a total of 90°when the light travels in the forward direction and then
the negative direction.
The Faraday rotators CASTECH provided , which the wavelength can reach from
the 355nm to 4500nm that used magneto-optical materials with high Verdet constant
and low absorption. Transmission of Faraday Rotator is achieved typically >98% and
the aperture is up to 25mm. The features of rotators are having high Damage
Threshold*, high power handling and accurate rotation of 45°±0.5°. CASTECH's
customized Faraday rotators are available.
Product list
l Laser sensing system
l Ultrafast laser system
l OCT system
l Laser detection etc
Applications
Faraday Rotators
Product number Type(t)
Power(p)
Aperture(a)
Wavelength(λ)
Wave plate(w)
Housing(h)
HPRO-t-p-a-λ-w-h FS(Common)
<200W
≤5mm 355nm780nm850nm980nm1030nm1064nm1319nm2000nm
...
C(Containing)
A01,...
A02,...8/10 mm
≤12 mm A03,...N(Not Containing)
≥200W ≤10 mm A15,...
135°
0°
45°90°
Input
180°
Polarization Reference:·All Free Space Isolators non-reciprocally rotator the plane of polarized light in 45 degree. ·1/2 wave plate is customized for arbitrary out polarizations if required.
The schematic diagram of
faraday rotator
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Specifications
A01(Aperture≤ 5mm) A02 ( Aperture=8/10mm )
A03 ( Aperture≤12mm )
Dimensions(mm)
VIS NIR IR
Center Wavelength 405,532,561,632,650,780,808,850,980nm,... 1030,1064nm,.. 1319,2000,4500nm,...
Wavelength Range ±10nm ±15nm ±10nm
Peak Transmission >98% >98% >95%
M2 Degradation <10% <10% <10%
Clear Aperture 2,3,4,5,8,10,12mm or others 2,3,4,5,8,10,12mm or others 3,4mm or others
Optical Power(Average) 10,30,50W,100W or others 10,30,50,100W or others 10,30,50W or others
Damage Threshold* 10J/cm2 @ 10ns1J/cm2 @ 8ps
10J/cm2 @ 10ns1J/cm2 at 8ps 5J/cm2 @ 10ns
Cooling Water-cooled or Conduction-Cooled
Storage Temperature Range -10~70
OperatingTemperature Range 10~30
A15(Water-cooled ,Aperture≤10mm )
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.*At customer-specified wavelength and temperature.
/Dimensions
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Product Introduction
Free space isolator according to its physical principles that can be divided into two
categories which are polarization dependent isolator and polarization independent
isolator.
The polarization dependent isolator, or Faraday isolator consists of three different
parts which are input polarizer (polarized vertically), Faraday rotator, and output
polarizer, called an analyser (polarized at 45°).
The polarization independent isolator consists of three main parts, which are input
birefringent beam displacer, Faraday rotator, 1/2 wave plate or an output birefringent
beam displacer. Usually the isolator used in the optical fiber laser system and it can
maintain the stability of optical system effectively.
The Free space isolators CASTECH provided , which the wavelength can reach
from the 355nm to 4500nm with simple and reliable mechanical structure, which used
high quality of crystals and optical components. CASTECH's Free space isolators have
peak isolation of 45dB, max transmission above 95%, and aperture up to 20mm.
CASTECH's customized Free space isolators are available.
l Lase precision machining
l Laser sensing system
l Ultrafast laser system
l OCT system
l Laser detection etc
Applications
Free Space Isolators
The schematic diagram of
non-polarization-maintaining isolator
The schematic diagram of
polarization-maintaining isolator
Product number Type(t)
Power(p)
Aperture(a)
Wavelength(λ)
Wave plate(w)
Housing(h)
HPISO-t-p-a-λ-w-h
Polarization dependent
AB(AdjustableBroadband )
≤100W
2mm,3mm,4mm,5mm,6mm,10mm...
550-880nm,…
C(Containing)
N(Not Containing)
A03,...
FS(Free Space)
355nm,532nm,780nm,1030nm,1064nm,1319nm,1990
nm,...
A04、A06、A08、 A11、A12,...
DS(Dual Stage) A15,...
Polarization independence 1.5mm,2mm,3mm,4mm,5mm,...
980nm,1030nm,1064nm,... A16,...
Polarization Reference:•All Free Space Isolators non-reciprocally rotator the plane of polarized light in 45 degree.•1/2 wave plate is customized for arbitrary out polarizations if required.
135°
0°
45°90°
Input
180°
Product list
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Specifications
Free Space Isolators (Common)
UV VIS NIR IR
Center Wavelength 355nm,... 405-980nm,... 1030,1064nm,... 1319,2000,4500nm,...
Wavelength Range ±10nm ±10nm ±15nm ±10nm
Peak Transmission >95% >92% >95% >90%
Peak Isolation >35dB >35dB >35dB >35dB
M2 Degradation <10% <10% <10% <10%
Clear Aperture 2,2.5,3,4mm or others 2,3,4mm or others 2,3,4,5,8,10,12mm or others 3,4mm or others
Optical Power(Average) 1,5,10W or others 10,30,50W or others 10,30,50,100W or others 10,30,50W or others
Damage Threshold* 3.5J/cm2 @ 10ns 10J/cm2 @ 10ns 10J/cm2 @ 10ns 5J/cm2 @ 10ns
Storage Temperature Range -10~70
Operating Temperature Range 10~30
Dimensions(mm)A04(Aperture≤5mm) A06(Aperture=8/10mm)
A08(Aperture=12mm) A11(Aperture≤2.5mm) A12(IR,Aperture≤5mm)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.*At customer-specified wavelength and temperature.
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Dual Stage and Adjustable Broadband
Dimensions(mm)
Dual Stage
Center Wavelength 335,405,532, 980,1030nm,1064nm,...
Wavelength Range ±20nm
Peak Transmission >90%
Peak Isolation >45dB
M2 Degradation <10%
Clear Aperture 3,4,5mm, or otrher
Optical Power(Average) ≤100W or otrher
Peak Pulse Power 20KW or otrher
Damage Threshold* 10J/cm2 @ 10ns
Storage Temperature Range -10~70
Operating Temperature Range 10~30
A15(Dual Stage,Aperture≤3mm)
Adjustable Broadband
Adjustable wavelength range 550-750nm,...
Wavelength Range 500-800nm,...
Peak Transmission >93%
Peak Isolation >35dB
M2 Degradation <10%
Clear Aperture 3,4,5mm, or otrher
Optical Power(Average) ≤100W or otrher
Peak Pulse Power 30KW or others
Damage Threshold* 10J/cm2 @ 10ns
Storage Temperature Range -10~70
Operating Temperature Range 10~30
A03(Adjustable Broadband)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.*At customer-specified wavelength and temperature.
SpecificationsSpecifications
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Specifications
Polarization Independent Isolator
Dimensions(mm)
Polarization Independent Isolator
Center Wavelength 980/1030/1064nm,...
Operating Wavelength Range ±10nm
Clear Aperture ≤10mm
Peak Isolation ≥35dB
Isolation in band at 23 ≥25dB
Insertion Loss at 23 ≤0.50dB
M2 Degradation <10%
Polarization Dependent Loss ≤0.15dB
Return Loss (Input/Output) ≥50dB
Optical Power(Average) 5,10,30,50W or others
Damage Threshold* 10J/cm2 @ 10ns
Storage Temperature Range -10~70
Operating Temperature Range 10~30
A16(Aperture ≤5mm)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.*At customer-specified wavelength and temperature.
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Product Introduction
Fiber-Free Space Isolators can be divided into two categories according to its
output mode: expanded-beam isolator and non-expanded-beam isolator.
The non-expanded-beam isolator consists of birefringent crystal, a Faraday rotator,
one 1/2 wave plate or a polarizer and collimator. Usually used in optical fiber laser
system, it can effectively maintain the stability of optical system.
The expanded-beam isolator consists of some major components of a collimator, a
birefringent crystal, a Faraday rotator, a wave plate or an optical rotating mirror and a
beam expanding mirror. The output spot has a large spot diameter and a small divergence
angle.
CASTECH created the Fiber-Free Space isolators, which adopted the high-quality
crystals and optical components with the precision beam expander sets, the peak
isolation of single-stage series can reach more than 35dB, and the peak isolation of dual-
stage series can reach more than 45dB, insertion loss ≤ 0.4dB. Its biggest feature is that
the product has no thermal lens effect when used at high power.CASTECH can
customize the Fiber-Free Space isolators according to customer needs.
Product list
l Fabrication of Fiber Laser
l Optical Fiber Sensor
l Laser gauge etc
Applications
Fiber-Free Space Isolators
Product number Type(t)
Power(p)
Fiber type(f)
Wavelength(λ)
Pigtail diameter(e)
Beam diameter(b)
Stage(s)
Spot shape( d )
Housing(h)
HPISO-t-p-f-λ-e-b-s-d-h
WLP(With Laser Pointer)
≤200 W
1(10/125SCF)
2(20/130DCF)
3(12/250SCF)
4(20/250DCF)
5(30/250DCF)
6(PM 980)
…
980nm1030nm1064nm
...
C(6mm Armoured Cable)
E(8mm Armoured Cable)
L(900μm Loose Tube)
56789…
S(Single)
G(Gauss)
F(Flat-top)
A09,...
EB(Expanded Beam)
A02,A05,...
D(Dual)
A11,...
FF(Non-Expanded Beam)
S(Single)
A08,...
D(Dual)
/
The schematic diagram of
fiber-free space isolators
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Specifications
Fiber-Free Space(Expanded-Beam)
Dimensions(mm)
Single Stage Dual Stage
Center Wavelength 980/1030/1064nm,... 980/1030/1064nm,...
Operating Wavelength Range ±10nm ±20nm
Peak Isolation ≥35dB ≥50dB
Isolation in band at 23 ≥25dB ≥40dB
Insertion Loss at 23 ≤0.4dB ≤0.6dB
Polarization Dependent Loss ≤0.15dB ≤0.15dB
Return Loss (Input/Output) ≥50dB ≥50dB
M2 Degradation <10% <10%
Beam Roundness >90%
Fiber Type LMA Fiber/ PM Fiber or others
Output Beam diameter(1/e2) 6,7,8mm or others
Optical Power(Average) 10,20,30,50,100,200,250,300W or others
Peak Pulse Power 10,20,30,50KW or others
Storage Temperature Range 10~50
Operating Temperature Range -10~70
A05(Single,Power≤120W)
A09(Isolator With Laser Pointer,Power≤50W) A11(Dual,Power≤100W)
A02(Single,Power≤50W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
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Specifications
Fiber-Free Space(Non-Expanded Beam)
Dimensions(mm)
Non-Expanded Beam
Center Wavelength 980/1030/1064nm
Operating Wavelength Range ±10nm
Peak Isolation ≥35dB
Isolation in band at 23 ≥25dB
Insertion Loss at 23 ≤0.4dB
Return Loss (Input/Output) ≥50dB
M2 Degradation <10%
Beam Roundness >90%
Fiber Type LMA Fiber/PM Fiber or others
Output Beam diameter(1/e2) 0.5mm or others
Optical Power(Average) 10,20,30,50W,100W or others
Peak Pulse Power 10,20KW or others
Operating Temperature Range 10~50
Storage Temperature Range -10~70
A08(Power≤70W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
CASTECH®
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Product Introduction In-line isolator can be divided into two categories according to the fiber types:
non-polarization-maintaining isolator and polarization-maintaining isolator.
The non-polarization-maintaining isolator consists of Birefringent crystal, a
Faraday rotator, a 1/2 wave plate or a polarizer , and a pair of collimators. Usually the
isolator used in the optical fiber laser system and it can maintain the stability of optical
system effectively.
The polarization-maintaining isolator is a laser device that can achieve the
transmission of linear polarization steadily and remain the polarization state
unchanged. It consists of major components of an input polarizer, a Faraday rotator, a
1/2 wave plate or a polarizer, an output polarizer, and a pair of collimators. In some
special applications, this type of isolator maintains the stability of the system‘s
polarization state. CASTECH's in-line isolators have an isolation of more than 30dB,
an insertion loss of less than 1.00dB, and an operating wavelength range of 850-
2000nm. The form of connection of the fiber tail can be adopted by FC/PC or bare
fiber. CASTECH can customize the in-line isolator according to customer needs.
Product list
l Fiber laser detection
l Optical coherence detection
l Laser sensing
l Laser communication etc
Applications
In-Line Isolators
Product number Type(t)
Power(p)
Fiber type(f)
Wavelength(λ)
End Diameter(e)
Fiber length(l)
Wave plate(b)
Housing(h)
HPISO-t-p-f-λ-e-1-b-h
Polarization dependent
C(Common)
≤100 W
2(PM10/125SCF)
3(PM20/130DCF)
6(M30/250DCF)
7(PM 980)
...
980nm,1030nm,1064nm,
...
L(900μm Loose Tube)
B(3mm Loose Tube)
1(1m)
2(1.5m)
…
C(Containing)
N(Not Containing)
A01,A06,A10,...
EB(Expanded
Beam)A11,...
Polarization independence
C(Common)
1(HI1060)
2(10/125SCF)
3(20/130DCF)
4(12/250DCF)
5(20/250DCF)
6(30/250DCF)
…
A03,A06,A08,...
EB(Expanded
Beam)A11,...
TRI(Tri-port)
A01,...
non-polarization-maintaining isolator
polarization-maintaining isolator
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Specifications
In-Line Isolators(Non-polarization-maintaining)
Dimensions(mm)
Common Polarization-maintaining Tri-port
Center Wavelength 1030/1064nm 1030/1064nm 1030/1064nm
Operating Wavelength Range ±10nm ±10nm ±10nm
Peak Isolation ≥33dB ≥33dB ≥33dB
Isolation in band at 23 ≥25dB ≥25dB ≥25dB
Insertion Loss at 23 ≤1.00dB ≤1.00dB ≤1.00dB
Polarization Dependent Loss ≤0.15dB ≤0.15dB ≤0.15dB
Return Loss (Input/Output) ≥50dB ≥50dB ≥50dB
Fiber Type 10/125 SCF or others 10/125 SCF or others HI1060 or others
Optical Power(Average) 0.3,0.5,2,3,5,10W or others 50,100W or others 3,5,10W or others
Peak Pulse Power 5KW or others 10KW or others 10KW or others
Storage Temperature Range -10~70 -10~70 -10~70
Operating Temperature Range 10~50 10~50 10~50
Output Beam diameter(1/e2) / 4,5,6mm or others /
Extinction Ratio / / ≥20dB
A03(Power≤20W)
A06(Power≤0.3W)A08(Power≤120W)
A11(Non-polarization-maintaining,Power≤100W)
A01(Power≤10W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
CASTECH®
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Specifications
In-Line Isolators(Polarization-maintaining)
Dimensions(mm)
Common Polarization-maintaining
Center Wavelength 1030/1064nm 1030/1064nm
Operating Wavelength Range ±10nm ±10nm
Peak Isolation ≥33dB ≥33dB
Isolation in band at 23 ≥25dB ≥25dB
Insertion Loss at 23 ≤1.00dB ≤1.00dB
Return Loss (Input/Output) ≥50dB ≥50dB
Fiber Type PM980 or others PM980 or others
Optical Power(Average) 3,5,10W or others 50,100W or others
Peak Pulse Power 5KW or others 10KW or others
Operating Temperature Range 10~50 10~50
Storage Temperature Range -10~70 -10~70
Output Beam diameter(1/e2) / 4,5,6mm or others
Extinction Ratio ≥20dB ≥20dB
A01(Power≤10W) A06(Power≤0.3W)
A10(Power≤2W) A11(Polarization-maintaining,Power≤100W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
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Product Introduction The circulator is a multi-port device, and light can only propagate in a specific
direction. For example, if the signal is input from port 1, it will be output from port 2.If
the signal is input from port 2, it will be output from port 3, and output from other ports
will be very costly. Circulator according to its physical principles can be divided into non-
polarization-maintaining circulator and polarization-maintaining circulator.
The non-polarization-maintaining circulator is an irreversible one-way three-port
device, which consists of three birefringent beam displacers, polarization elements, a
Faraday rotator, 1/2 wave plate and three collimators. Polarization-independent optical
circulator.
The polarization-maintaining optical circulator consists of an input polarizer, a
Faraday rotator, a 1/2 wave plate, an output polarizer and three collimators. It is widely
used in many optical devices and many occasions. CASTECH's circulators have low
insertion loss, high isolation, low polarization dependent loss, excellent temperature
stability, center wavelength of 980-2000nm. The form of connection of the fiber tail can
be adopted by FC/PC or bare fiber. CASTECH can customize the circulator according to
customer needs.
Product list
l Fiber optical Sensor system
l Bidirectional Signal Transmission System
l Dispersion compensation
Applications
Optical Circulators
Product number Type(t)
Power(p)
Fiber type(f)
Wavelength(λ)
End Diameter(e)
Fiber length(l)
Wave plate(b)
Housing(h)
HPISO-t-p-f-λ-e-1-b-h
C(Commom)
≤20 W
1(10/125SCF)
2(20/130DCF)
3(12/250DCF)
4(20/250DCF)
5(30/250DCF)
10(HI1060 )
…
980nm1030nm1064nm2000nm
...
L(900μm Loose Tube)
B(3mm Loose Tube)
1(1m)
2(1.5m)
…
C(Containing)
N(Not Containing)
A03,...
A02,...TRI(Tri-port)
6(PM 980)
7(PM10/125SCF)
8(PM20/130DCF)
9(PM30/250DCF)
…
Polarization-maintaining circulator
Non-polarization-maintaining circulator
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Specifications
Dimensions(mm)
Non-polarization-maintaining Polarization-maintaining
Center Wavelength 980,1030,1064,2000nm... 980,1030,1064,2000nm...
Operating Wavelength Range ±10nm ±10nm
Peak Isolation ≥30dB ≥30dB
Isolation in band at 23 ≥25dB ≥25dB
Insertion Loss at 23 ≤1.00dB ≤1.00dB
Return Loss (Input/Output) ≥50dB ≥50dB
Fiber Type HI1060 or others PM980 or others
Min. Crosstalk 45dB 45dB
Optical Power(Average) 3,5,10,20W or others 3,5,10,20W or others
Peak Pulse Power 10KW or others 10KW or others
Operating Temperature Range 10~50 10~50
Storage Temperature Range -10~70 -10~70
Extinction Ratio / ≥20dB
A02(Non-polarization-maintaining,Power≤20W) A03(Polarization-maintaining,Power≤10W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Optical Circulators
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Acousto-Optic Devices
AO Q-Switches
AO Modulators
AO Frequency Shifters
AO Deflectors
RF Drivers
CASTECH®
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Product Introduction The acousto-optic Q-switch (AOQS) is a special modulator that designed for
inside laser cavities. This type of product can minimize the insert loss and
supporting of high Damage Threshold*. It can diffract a portion of the laser flux
out from the cavity (Raman Nath or Bragg regime) when it applied the RF signal .
This increases the cavity losses and prevents oscillation. When the RF signal is
switched off, the cavity losses decrease rapidly and it will produce the evolves of
intense laser pulse. Our product equipped some special qualities such as the ultra-
low loss (up to 99.6%), high switching speeds, and premium pulse-to-pulse
stability.
CASTECH's AO Q-switch, which the wavelength can reach from the 355nm to
2000nm that used utilize materials with high optical power handling such as fused
silica or crystal quartz. In order to maintain high efficiency with these materials,
higher RF powers are necessary and therefore require adequate conduction or water
cooling. CASTECH's customized AO Q-switch are available.
Product list
Applications
AO Q-Switches
Product number RF(f)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
RF connector(c)
Housing(h)
CAQS-f-a-mt-w-c-h
27.12 MHz
1-8mm
FS(Fused Silica)
C(Compressional)
1064nm,... BNCA08,...
A01,A02,...40.68 MHz
CQ(Crystal Quartz)
355,1312,1030,1064nm,...
SMA,BNC,MMCX,… A05,...68 MHz
1-6mm A01,A02,...80 MHz DF
(Dense Flint)1047-1064nm,... SMA,BNC,… A09,...
l Laser marking
l Lithography
l Material processing
l Medical surgery
l Micromachining
The schematic diagram of AO Q-switch
Acousto-Optic Devices
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Dimensions(mm)
Water-cooled AO Q-Switches
Material Fused Silica Crystal quartzWavelength 1064 nm 1064 nm
Transmission(Single pass) ≥99.6% ≥99.6%
Damage Threshold >1GW/cm²@1064nm,10ns,10Hz >1GW/cm²@1064nm,10ns,10HzCondition through base plate <0.2% /Single side <0.2% /Single sidePolarization Random Linear,vertical to baseAperture 1-8mm 1-6 mmRF Frequency 27.12/40.68MHz 40.68/80MHz
RF power rating(Maximum)50 WCompressional
50 W100W Shear
RF connector BNC BNC
Thermal Security connector SMA,SMB,SMC SMA,SMB,SMC
Rise time(10~90%) 110 ns/mm 113 ns/mmDiffraction efficiency >60% >60%Input impedance 50 Ω 50ΩVSWR <1.2:1 (<1.4:1 50W Diffraction power) <1.2:1 (<1.4:1 50W Diffraction power)
Cooling materials 316stainless steel 316stainless steelWater flow rate >190 cc/min >190 cc/minOperating temperature 10~40 10~40
Storage temperature 0~50 0~50
A08(Frequency=27.12/40.68MHz)
Specifications
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
CASTECH®
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Dimensions(mm)
Conduction-Cooled AO Q-Switches
A01 (Frequency=40.68/80MHz)
Material Crystal Quartz Dense FlintWavelength 1030,1064,… nm 1047-1064,...nmTransmission(Single pass) ≥99.6% ≥97.0%
Damage Threshold >1GW/cm²@1064nm,10ns,10Hz >1GW/cm²@1064nm,10ns,10HzCondition through base plate <0.2% <0.2% Polarization Linear,vertical to base RandomAperture 0.5-3mm 0.5-2mmAcoustic mode Compressional CompressionalRF frequency 40.68/68/80 MHz,... 80/100/120MHz...
RF power rating(Maximum) 25W 5W
RF connector SMA,BNC,MMCX,… SMA,BNC,…
Rise time(10~90%) 113 ns/mm 177 ns/mmDiffraction efficiency ≥85% ≥50%VSWR <1.2:1 <1.2:1Cooling Conduction-cooled Conduction-cooledStorage temperature -20~70 -20~70
A02(Frequency=40.68/80MHz)
Specifications
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
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Product Introduction Acousto-optic modulators (AOM) can be used like a shutter (cycling light
on and off at a set frequency), or as a variable attenuator (controlling the
intensity of transmitted light dynamically). This product only exist 1st order
diffracted light under the interaction of Bragg diffraction.
According to the types of structure, CASTECH's acousto-optic modulators
can be divided into: free-space AOM and fiber-coupled AOM. CASTECH's
modulator optimizes the high laser Damage Threshold*. The acousto-optic
medium Damage Threshold* is >1GW/cm2. The form of connection of the
fiber-coupled AOM fiber termination can be adopted by the FC/PC or bare fiber,
it provides the aspects of requirements of rise time, modulation rate and
application power for process the matching. CASTECH can customize the
product according to customer needs.
AO Modulators
Product number Type RF(f)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
Connector(c)
Housing(h)
CAOM-f-a-mt -w-c-h Free space
100 MHz120 MHz150 MHz200 MHz250 MHz
...
≤2 mm TE(TeO2)
C(Compressional)
1064nmSMASMC
…A13,...
Applications
Product list
Product number Type RF (f)
RF Range(r)
Power(p)
Material(m)
Fiber type(a)
Fiber terminal(t)
Wavelength(w)
Connector(c)
Housing(h)
CAFQ-f/r-p-mat-w-c-h Fiber-coupled
100 MHz120 MHz150 MHz200 MHz250 MHz
...
/ ≤2.5W TE(TeO2)
1(HI1060)
2(PM980)
3(PM 10/125)
...
B(Bare Fiber)
F(FC/PC)
1064nm...
SMA... A19,...
The schematic diagram of AO Modulator
l Laser marking
l Lithography
l Material processing
l Medical surgery
l Micromachining
CASTECH®
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Free Space AO Modulators
Material TeO2
Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* >1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom ≥80%Polarization RandomClear Aperture 0.5,1,1.5,2,…mmAcoustic mode CompressionalDiffraction efficiency Bragg DiffractionRF frequency 100,120,150,250…MHzRF power rating(Maximum) ≤2.5 W RF connector SMA,SMC,…Rise-time/fall-time <120 nsInput impedance 50 ΩVSWR <1.2:1Operating Temperature Range 10~40
Storage Temperature Range 0~50
Specifications
Dimensions(mm)
A13
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
Acousto-Optic Devices
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Fiber-Coupled AO Modulators
Material TeO2
Wavelength 1064 nmAverage optical power handling 1 WPeak optical power handling 1 KWInsertion loss ≤ 4dBPolarization dependent loss ≥18 dBAcoustic mode CompressionalExtinction ratio >45 dBRise-time/fall-time: (10% - 90%) ≤10 nsRF frequency 200/250 MHzRF power rating(Maximum) 2.5 W RF connector SMAInput impedance 50 ΩVSWR <1.5:1Fiber type PM980、PM 10/125Fiber length 1.3 mFiber termination Bare Fiber、FC/APCStorage Temperature Range 0~50
Specifications
Dimensions(mm)
A19
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
CASTECH®
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Product Introduction The Acousto-Optic Frequency Shifter (AOFS) with RF driver is used to
modify the frequency of the optical beam. Due to the Doppler shift, the frequency
shift of 1st order diffracted light (variation quantity of wavelength) equals to the
frequency of acoustic (wavelength) after the AO frequency shifters. If the incident
direction of acoustic wave and optical wave are the same, the laser frequency shifts
will be the positive value, anyway if the incident direction are opposite, the value
of the laser frequency shifts will be the negative value.
Applications such as interference-based optical techniques require a high
extinction ratio between the diffracted and undiffracted beam; This can be achieved
with a high-quality optical finish to minimize optical scatter.
CASTECH offers standard products with frequency shifts of 73 MHz. In
addition,CASTECH provides the services of customize for center frequency and
the value of frequency shifts.
Product list
Applications
AO Frequency Shifters
l Interferometry
l Laser cooling
l Laser Doppler velocimetry
l Optical heterodyne detection
Product number Center frequency(f)
RF range(r)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
RF connector(c)
Housing(h)
CAFS-f/r-a-mt-w-c-h
80MHz100MHz120MHz200MHz
...
/ ≤2mm TE(TeO2)
C(Compressional)
1064nm,... SMA A17,...
Acousto-Optic Devices
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AO Frequency Shifters
Material TeO2
Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* >1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom >70%Polarization RandomClear Aperture 0.5,1,1.5,2,…mmAcoustic mode CompressionalOperating mode BraggDiffraction angle 18.5 mradRF Frequency 73 MHzRF Bandwidth 6 MHzRF power rating(Maximum) 2 W RF connector SMARise time <120 nsInput impedance 50 ΩVSWR <1.2:1Operating temperature 10~40
Specifications
Dimensions(mm)
A17
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
CASTECH®
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Product Introduction Acousto-optic deflectors (AODF) are based on the deflection of light by a
propagating acoustic wave in an optical isotropic medium. Incident light is
deflected in one or more directions by periodic variations in the refractive index
produced by the propagating ultrasound wave. AODF offers precise angular control
of an optical beam using RF drive frequency tuning.
CASTECH's AODF uses TeO2 crystal as the acousto-optic medium. CASTECH
promised the high quality of crystal due to the advanced growth and polishing
process and it makes the deflectors exists the low insertion loss and high Damage
Threshold*. In the meanwhile, we provide full scan angle diffraction efficiency and
power flux consistency. CASTECH can customize the product of AODF according
to customer needs.
Product list
Applications
Acousto-optic Deflectors
l Laser display
l Precision Machining
Product number Center frequency(f)
RF range(r)
Aperture(a)
Material(m)
Mode(t)
Wavelength(w)
RF connector(c)
Housing(h)
CADF-f/r-a-mt-w-c-h 90 MHz... / ≤2mm TE(TeO2)
S(Shear)
1064 nm SMA A33
Acousto-Optic Devices
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Acousto-optic Deflectors
Material TeO2
Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* >1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom >80%
Input Polarization 0°to mounting plane Output Polarization 90°to mounting plane
Clear Aperture 0.5,1,1.5,2,…mmAcoustic mode ShearOperating mode BraggDiffraction angle 18.5 mradCenter Frequency 90 MHzRF Bandwidth 35 MHzRF power rating(Maximum) 2 W RF connector SMAInput impedance 50 ΩVSWR <2:1Operating temperature 10~40
Storage temperature 0~50
Specifications
Dimensions(mm)
*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
A33
CASTECH®
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Product Introduction RF driver is designed for Acousto-Optic Devices. It can outputs the RF power
signal of fixed or variable-frequency. Through different modulated signals it can
produce the same, opposite or specific waveform to satisfied the optical devices to
accomplish the functions in different applications.
CASTECH's TRF drive power can be used with Acousto-Optic Devices. The
radio frequency (RF) can be 27MHz, 40.68MHz, 68MHz, 80MH and other higher
frequencies, and the radio frequency (RF) power can reach 30W. The drive power
supply has a variety of operating modes, such as FPS, PPK, R05 and A05. In
addition, the product can be customized according to customer requirements.
RF Drivers
Product list
l Matching Acousto-Optic Devices
Applications
Product number Series(as)
RF(f)
Supply power(v)
Power(p)
Cooling(t)
Channel number
(b)
Mode(m)
function(e)
RF connector (c)
CARD-as-f-vpt-bme-c
FA(Fixed
frequency A)
27MHz
40.68MHz
68MHz
80MHz
... 15D
(15 VDC)
24D
(24 VDC)
28D
(28 VDC)
>20W
C
(Conduction-Cooled)
A
(Air-Cooled)
W
(Water-Cooled)
1
F(FPS)
P(PPK)
A(A05)
R(R05)
M(M05)
C(Common)
...
SMA-F SMA-M BNC-F BNC-MSMC-F SMC-M
FB(Fixed
frequency B)
27MHz
40.68MHz
68MHz
80MHz
100MHz
...
10W20W30W
1 F(FPS)
S(Analog)
FC(Fixed
frequency C)
40.68MHz
68MHz
80MHz
...
10W20W 1 F(FPS)
S(Analog)
Acousto-Optic Devices
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RF Drivers - FA Series
RF frequency 27、40.68、68、80MHz
Frequency stability +/-1 ppm/°C
Output power ≥ 20 W
Digital control 5V TTL
Analog control0-5 V / 10 kΩ
5V (maximum output power)
Rise-time/fall-time(10%-90%) < 35 ns
Trigger frequency 1Hz - 1MHz
Input/output impedance 50 Ω
Fixed pulse adjustable 1 - 20 us
FPS windows adjustable 20 - 300 us
Supply power15VDC / 24 VDC
< 3A
VSWR < 1.2/1
Extinction ratio > 50 dB
Mode FPS\PPK\A05\R05\M05
Operating temperature 10~55
Dimensions(mm)
Specifications
*Customized (dimension, RF frequency, Output power, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
CASTECH®
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Specifications
Dimensions(mm)
*Customized (dimension, RF frequency, Output power, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
RF frequency 27、40.68、68、80MHz
Frequency stability +/-1 ppm/°C
Output power ≥ 20 W
Digital control 5V TTL
Analog control0-5 V / 10 kΩ
5V (maximum output power)
Rise-time/fall-time(10%-90%) < 50 ns
Trigger frequency 1Hz – 1MHz
Input/output impedance 50 Ω
Supply power15VDC / 24 VDC
< 3AVSWR < 1.2/1
Extinction ratio > 40 dB
Mode FPS\Analog
Input/Output Interface DB9 / SMA
Operating temperature 10~55
RF Drivers - FB Series
Acousto-Optic Devices
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Specifications
Dimensions(mm)
*Customized (dimension, RF frequency, Output power, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.
RF frequency 40.68、68、80MHz
Frequency stability +/-1 ppm/°C
Output power ≥ 10 W
Digital control 5V TTL
Analog control0-5 V / 10 kΩ
5V (maximum output power)
Rise-time/fall-time(10%-90%) < 50 ns
Input/output impedance 50 Ω
Supply power15VDC / 24 VDC
< 3AVSWR < 1.5/1
Mode FPS\Analog
Input/Output Interface DB9 / SMA
Operating temperature 10~55
RF Drivers - FC Series
CASTECH®
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BBO Pockels Cells
KD*P Pockels Cells
Pockels Cells Drivers
01
02
03
Electro-Optic Devices
Electro-optic Devices
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Product Introduction
Pockels cells is a devices that used the Pockels effect by apply the
voltage on electro-optic crystal to change the polarization of incident light.
The Pockels effect, which includes the transverse and longitudinal Pockels
effect. In the case of the transverse Pockels effect the direction of the light is
perpendicular to the direction of electric field, but under the longitudinal
Pockels effect, they are parallel to each other. BBO Pockels Cells created by
use the transverse Pockels effect, it can reduce the voltage by changing the
ratio of BBO's width to length. We offer BBO Pockels cells with different CA
and length to choose from. Due to the low piezoelectric response and high
Damage Threshold*s of BBO, CASTECH's BBO Pockels cells supported the
application environment at 1MHz.
CASTECH provides the BBO Pockels Cells that can be divided into two
types, which are single or dual crystal geometry. Moreover, we also provide
different types of products and customized services to meet customer needs.
Product list
Applications
BBO Pockels Cells
Product number Aperture(a)
Crystal length(l)
Crystal quantity(q)
Additional(b)
Wavelength(w)
BPC-a l q-b-w
≤12mm A(20mm)
B(25mm)
...
S(single)
D(double)
…
C(Ceramic)
W(Wave plate)
B(Brewster window)
A(Brewster window & wave plate)
N(Nothing)
…
1(1064nm)
2(1030nm)
3(532nm)
...
Fiber-coupledFC/PC
Bare fiber…
l High repetition rate Q-switching
l Machining ,marking
l High speed optical switch
l Beam chopper
l Cavity dumping
The schematic diagram of BBO Pockels Cells
CASTECH®
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CASTECH®
BBO Pockels Cells - S Series
Dimensions(mm)
Specifications
Model BPC-3AS BPC-3BS BPC-4AS BPC-4BS BPC-5AS BPC-5BS BPC-6AS BPC-6BS
Aperture diameter,mm 2.6 3.6 4.6 5.6
Crystal size(W*H*L),mm 3*3*20 3*3*25 4*4*20 4*4*25 5*5*20 5*5*25 6*6*20 6*6*25
λ/4 voltage(@ 1064 nm), kV DC 3.5 2.8 4.9 3.9 5.9 4.7 7.3 5.8
Capacitance, pF ≤3
Optical transmission % ≥98
Contrast ratio ≥1000:1
Dimension, mm 25.4*35 25.4*40 25.4*35 25.4*40 25.4*35 25.4*40 25.4*35 25.4*40
Damage Threshold 10J/cm², at 1064 nm, 10 ns, 10 Hz
BBO Pockels Cells - S Series
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
BPC-XAS-C/W BPC-XAS-A/B
BPC-XBS-C/W BPC-XBS-A/B
Electro-Optic Devices
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Specifications
Model BPC-3AD BPC-3BD BPC-4AD BPC-4BD BPC-5AD BPC-5BD BPC-6AD BPC-6BD
Aperture diameter,mm 2.6 3.6 4.6 5.6
Crystal size(W*H*L),mm 3*3*20 3*3*25 4*4*20 4*4*25 5*5*20 5*5*25 6*6*20 6*6*25
λ/4 voltage(@ 1064 nm), kV DC 1.8 1.4 2.5 2.0 3.0 2.4 3.7 2.9
Capacitance, pF ≤6
Optical transmission % ≥97
Contrast ratio ≥1000:1
Dimension, mm 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7
Damage Threshold 10J/cm², at 1064 nm, 10 ns, 10 Hz
BBO Pockels Cells - D Series
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
BPC-XAD-C/W BPC-XAD-A/B
BPC-XBD-A/BBPC-XBD-C/W
Dimensions(mm)
CASTECH®
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Specifications
Model Insertion loss Contrast ratio Power Fiber type Vλ/4 @1064nm Repetition rate Capacity
BPC-LF
<1.5dB >25dB 500 mW1 W2 W...
HI1060PM980
...
375±10V
300kHz
≤8pF
<1dB >30dB 1100±10V ≤16pF
BBO Pockels Cells - L Series
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Vλ/4 @1064nm=375V
Vλ/4 @1064nm=1100V
Dimensions(mm)
Electro-Optic Devices
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Product Introduction
Pockels Cells is an optical devices for use to changing the polarization
state of light, inside of this product that equipped with the electro-optic
crystals (e.g KD*P). If applied the voltage to the Pockels Cells, when the laser
passing through the Pockels Cells, it will change the polarization direction of
the emergent light. The Pockels Cells can be used as a fast electro-optics
switch when the Pockels Cells used with the polarization element.
CASTECH provides the complete KD*P Pockels Cells range for our
customers. According to the shapes, it can be classified into two different
types of Pockels Cells, which are cylindrical (series DPC-R) and the cubic
(series DPC-S). The electrode connection for the DRC-R series can be the
connection of wires or insert pin. In the meanwhile, CASTECH provides the
integrated pre-adjusted Brewster polarizer, wave plate or ceramic plate.
CASTECH provides the Pockels Cells are all exists the AR coats windows,
under the promised of high transmittance is to guarantee the performance and
increases the lifetime for this product.
Product list
KD*P Pockels Cells
Product number Type(t)
Aperture(a)
Crystal quantity(q)
Connection(c)
Additional(b)
Wavelength(w)
DPC-R X X - X X - X R(Circular)
≤12mmS
(single)D
(double)…
P(Pin)
W(Wire)
…
C(Ceramic)
W(Wave plate)
B(Brewster window)
A(Brewster window & wave plate)
N(Nothing)
…
1(1064nm)
2(1030nm)
3(532nm)
...DPC-S X X - X X - X S
(Square)
≤12mm
≤8mm
Applications
l Q-switching
l Regenerative amplifier control
l Machining ,marking
l Cavity dumping
l Pulse Picker
l Optical power stabilizer
The schematic diagram of KD*P Pockels Cells
CASTECH®
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Dimensions(mm)
Specifications
KD*P Pockels Cells
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Model DPC-RNS-W DPC-RNS-PC DPC-RNS-PB DPC-SNS-P DPC-SND-P
Clear aperture,(mm) 8,10,12 8,10,12 8,10 8 8
Intrinsic Contrast Ratio(ICR) >2000:1 >2000:1 >1000:1 >2000:1 >2000:1
Voltage Contrast Ratio (VCR)
CP >1500:1 >1500:1 >800:1 >1500:1 >1500:1
PP >1000:1 >1000:1 >500:1 >1000:1 >1000:1
Optical transmission >98% >98% >97% >98% >97%
λ/4 voltage,kV <4.0 <4.0 <4.0 <4.0 <2.0
Capacitance, pF 3-8 3-8 3-6 3-6 5-8
Damage Threshold 10J/cm², at 1064 nm, 10 ns, 10 Hz
DPC-RNS-PC
DPC-RNS-P
DPC-SNS-P
DPC-RNS-W
DPC-RNS-PB
DPC-SND-P
Electro-Optic Devices
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Product Introduction Pockels Cells Driver is an electricity devices which applied with the
Pockels Cells, it has the internal integration consists of high voltage power
supply and drive circuit. When the internal of the Pockels Cells driver
generated the frequency signal or the external applied the frequency signal, it
will produce the high voltage signal of relative frequency. When the laser
passing through the Pockels Cells, the change of the polarization direction of
the light is due to the Pockels Cells Driver applied the voltage to the Pockels
Cells. CASTECH‘s Pockels Cells Driver is suitable for the KD*P Pockels
Cells which is under the conditions of low repetition frequency and the BBO
Pockels Cells which under the conditions of high repetition frequency as well
as the pulse picker.
CASTECH created Pockels Cells Driver which according to the waveform
of outputs mode can be classified into three categories: positive, negative, and
square. CASTECH provides the services of customized for special types of
Pockels Cells Driver which from the aspects of output voltage and shape
dimension for our customers.
Product list
Applications
Pockels Cells Drivers
Product number Mode(M)
Max. voltage(V)
Max. frequency(F)
Trigger mode(T)
Housing(H)
PCD-M V-F-T-H
P(Positive)
6(6 kV)
5(5 kV)
4(4 kV)
3(3 kV)...
1(1 kHz)
50(50 kHz)
100(100 kHz)
1000(1000 kHz)
...
F(External)
I(Internal&External)
N00N01N02…
N(Negative)
S(Square)
l BBO Pockels Cells
l KD*P Pockels Cells
l High speed optical switch
l Pulse Picker
l Optical power stabilizer
The schematic diagram of positive
The schematic diagram of negative
The schematic diagram of square
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Dimensions(mm)mm
Specifications
Pockels Cells Drivers
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Model PCD-P4-100-T-H PCD-N4-100-T-H PCD-S3-100-T-H
Maximum high voltage pulse amplitude 4 kV 4 kV 3 kV
Polarity Positive Negative Square
HV pulse rise time <10ns ~1us <10ns
HV pulse fall time ~1us <10ns <10ns
Maximum HV pulse repetition rate 100kHz
Trigger mode INT/EXT
Input-output delay 70 to 300us /
External triggering pulse duration requirement >100ns >200ns
External triggering pulse amplitude requirement 3.3-5V (TTL)
External triggering pulse rise & fall requirement <10ns
HV pulse jitter <1ns
External powering requirements DC 24V 3A / AC 85~264 V
Radiator Water-cooled / Air-cooled
The common without screen
The common with screen The small with screen
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Fiber Collimators
F-Theta Lenses
Beam expanders
Attenuators04
03
02
01
Laser Application Devices
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Product Introduction Fiber collimator is a major passive device, it is a significant component
while forming laser devices such as isolators and circulators, this kind of
devices that made by precisely aligned of optical fiber tips and focusing lens.
It collimates beam from fiber, or couples collimated beams into fiber.
According to the output mode of Optical switches, it can be classified
into two categories: Non-expanded and expanded collimator.
Non-expanded collimator consists of fiber head and focusing lens, which
has simple structure, weightless and usually used in optical fiber laser systems
for beam collimate or coupling.
Expanded collimator consists of fiber head, a focusing lens, beam
expander, it has a small divergence angle and usually used in the large spot
output system.
CASTECH provides the Fiber collimator, which the wavelength can reach
from the 980nm~ 2000nm, that adopted high-quality lens and the optical
element, corporate with simple and reliable mechanical structure, the return
loss of the product can reach more than 50dB, it has the special features of
small divergence and long working distance, other contents can be customized
according to the needs of customers
l Isolators
l Optical Switches
l Optical Circulators
l Fiber laser
Fiber Collimators
Product number Type(t)
Power(p)
Fiber type(f)
Wavelength(λ)
End Diameter(e)
Beam diameter(b)
Housing(h)
HPCOL-t-p-f-λ-e-b-h
N(Non-expanded)
≤500W
1(10/125SCF)
2(20/130DCF)
3(12/250DCF)
4(20/250DCF)
5(30/250DCF)
6(PM 980)
7(PM10/125SCF)
8(PM20/130DCF)
9(PM30/250DCF)
…
980nm1030nm1064nm
...
L(900μm Loose Tube)
C(6mm Armoured Cable)
E(8mm Armoured Cable)
0.4(0.4 mm)
0.5(0.5 mm)
1(1 mm)
2(2 mm)
5(5 mm)
…
A01,...
A02,QCS,...E(Expanded)
The structure diagram of collimator
Applications
Product list
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High Power Collimator
Non-expanded Expanded
Operating Wavelength 1030/1064nm,... 1030/1064nm,...
Wavelength range ±20nm ≥±20nm
Working distance 200mm or others 300mm or others
Working distance range ±10mm or others ±50mm or others
Return Loss (Input/Output) ≥50dB ≥50dB
Fiber Type 20/130 or others 20/130 or others
Optical Power(Average) 5,10,20,30W or others 5,10,20,30W or others
Beam Diameter 0.5mm or others 5mm or others
Divergence 1.7mrad or others /
OperatingTemperature Range 10~50 10~50
Storage Temperature Range 10~70 10~70
A01(Non-expanded,Power≤30W) A02(Expanded,Power≤200W)
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
QCS
Dimensions(mm)
Specifications
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Product Introduction F-Theta lenses are commonly used in laser marking, engraving, and
cutting systems. The functions of F-Theta Lens is to provide a flat field for
the image plane which is in the scanning system. The scan radial image
height equals to focal length of the lens multiplied by the angle of the chief
ray makes in the object space. The formula as follow: 2y'=EFL×2θ×π
/180 where 2y' is the scan length or diagonal, EFL is the focal length of the
scan lens, 2θ is overall scan angle.
CASTECH provides the flat-field focusing lens that can be classified into
two categories: telecentric and non-telecentric. It combines the high-quality
optical lenses with precision mechanical structures. In the meanwhile, the
product has a standard threaded interface, which is compatible and easy to
assemble. Various parameters can be customized according to customer
requirements
l Laser Scanning
l Short Pulse Laser
l Ultrashort Pulse Laser
F-Theta Lenses
Product number Wavelength(A)
Focal distance(B)
Scan field(C)
FT-A-B-C 355nm...
109(109.4mm)
160(160mm)
174(174.1mm)
225(255mm)
...
63(63×63mm)
99(99×99mm)
107(107×107mm)
158(158×158mm)
...
Telecentric F-Theta Lenses Non-telecentric F-Theta Lenses
Advantage The shape of the central spot is consistent with that of the edge spot. the distortion of the spot is small. Low Cost, Practical
Disadvantage Large size, heavy The magnification will vary, and the difference between the center and the edge is large.
Applications
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F-Theta Lenses
*Customized (wavelength, dimension, efl, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Name F-Theta LensesMaterial Fused Silica
Wavelength (nm) 355,...
EFL(mm) 109.4,160,174.1,255
BFL(mm) 153.5,196.99,219.48,321.7Working Distance(mm) 151.5,194.43,216.48,319.7
Scan Angle (°) ±24.3,±25,±25.3,±25.5
Scan Length (mm) 91.8,140,151,224.8Scan Field(mm) 63×63,99×99,107×107,158×158
Entrance Beam Diameter(mm) 6,7,7,10m1 / m2 13 / 35.5,13 / 23,13 / 20,13 / 28
M2 to Mount Edge(mm) 26,15.87,13.72,21Image Spot Size (1 / e2)(um) 12,15,16,17
Diameter(mm) 121,90,90,107Total Length(mm) 88.5,55.7,51.98,60.5
Screw Thread M85×1Transmission >97%
Protective Window Yes
FT-355-109-63 ( telecentric ): FT-355-160-99:
FT-355-174-107: FT-355-255-158:
Dimensions(mm)
Specifications
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Product Introduction Beam expander is an optical device which used to increase the diameter of
collimated input beam to larger collimated output beam. The Beam expander
primarily applied in such Laser scanning, laser cutting, interferometry, and
remote sensing. Usually, the beam expander consists of a negative and a
positive lens.
CASTECH provides the beam expander can be classified into two categories:
adjustable divergence angle and non-adjustable divergence angle. The product
has a variety of magnification and outside diameter, easy to install and integrate
and can satisfy various demands of our customers. The parameters can be
customized according to customer requirements. l Laser Scanning
l Short Pulse Laser
l Ultrashort Pulse Laser
Beam Expanders
Product number Wavelength(A)
Magnification(B)
Thread(C)
Wavelength(D)
Housing(H)
BE-A-B-C-D-H 355nm...
2(2X)
3(3X)
...
2(2M22*0.75)
3(3M30*1)
...
A(yes)
B(no)
G01G02...
Adjustable divergence angle Not adjustable divergence angle
Advantage Divergence angle can be adjusted to minimum Simple structure and low cost
Disadvantage Complex structure and high cost The divergence angle can not be fine-tuned to achieve the best effect.
Applications
Product list
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Beam Expanders
*Customized (wavelength, dimension, efl, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Name Laser Beam Expander
Material Fused Silica
Wavelength (nm) 355, …
Magnification 2,3,4,... 5,6,7,8,10,... 2,5,7.5,...
Clear Input Aperture(mm) 12, 8, 8 8 8
Clear Output Aperture (mm) 26, 26, 20 31 15
Max. Input Beam Diameter(mm) 10, 6, 4 6, 4, 4, 3, 3 2
Outside Diameter(mm) 42 46 120*30*25.4
Total Length(mm) 58 80 /
Screw Thread M22×0.75 or M30×1
Transmission >98%
Divergence Adjustable No or Yes
Damage Threshold 5J/cm², at 355 nm, 5 ns, 10 Hz
G01 G02
G03 G04
Dimensions(mm)
Specifications
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Product Introduction Optical attenuator is an optical device which can be used in continuously change
the output power of laser. The device consists of a wave plate (or an electro-optical
crystal) and a polarizer. The polarization of incident light is modulated by wave plate
(or an electro-optical crystal) and then incident on the polarizer. The polarizer will
divide the incident light into two beams, to accomplish the target of changing the
transmitted light power which is by changing the ratio of the two beams. Optical
attenuators are widely used in various fields such as the precision laser processing,
laser detection, sensing and others. They also have unique advantages in ultra-fast
and ultra-short pulse laser systems.
CASTECH provides the attenuator can be classified into two types: wave plate
modulation and electro-optic modulation. Wave plate modulation is to control the
ratio of P and s light through polarizer by controlling the rotation angle of 1/2 wave
plate. This kind of product has compact structure and strong adaptability. The
electro-optic modulation Attenuator 's maximum speed of the power regulation can
reach the nanoseconds, also it can be used as high speed light switches. The polarizer
of these two products can choose the polarization splitter prism or Brewster window.
In the meanwhile, there has the electric and manual control schemes can be selected.
Users can choose the appropriate product type according to the use requirements.
The product can also be matched with easy-to-disassemble optical traps for selective
use by customers.
l Laser Industrial Processing
l Laser Sensing System
l Ultrafast Laser System
Attenuators
Product number Type(t)
Control(c)
Polarize(b)
Aperture(a)
Power(p)
Wavelength(λ)
Housing(h)
COA-tc-B-a-p-λ-h O
(Optical)
E(Electroptical)
A(Automatic)
M(Manual)
B(Brewster)
5,10,20,40mm,.. ≤10000W532,800,1030,
1064nm,...
P01, P02,...
COA-tc-P-a-p-λ-h
P(PBS)
5,10,12,25.4mm,.. ≤200W P04,...
Polarizer type PBS Brewster window
Advantage High extinction ratioP-light and S-light are perpendicular to each other
Large apertureHigh Damage Threshold*
Disadvantage relatively low Damage Threshold*Limited aperture P-light and S-light have a certain angle
Applications
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Optical Attenuators
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Name Optical attenuator
Type Optical (half-wave plate )
Wavelength (nm) 1550,1064,1030,800,532,355,343,…
Damage Threshold* (10ns 10Hz@1064) 30J/cm² (Brewster polarizer) or 10J/cm² (PBS)
Average power Up to 5000W (Brewster polarizer ) / 500W (PBS)
Extinction Ratio(Tp : Ts) >1000 : 1
Attenuation range 0.3%-99%
Control mode Manual or Automatic
Polarizer Brewster window or PBS
Storage temperature 10~50
Storage humidity <50%RH
P01 P02 P03
Dimensions(mm)
Specifications
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Electro-Optic Attenuators
*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.
Name Optical attenuator
Type Electro-optic (crystal)
Wavelength (nm) 1550,1064,1030,800,532,355,343,…
Damage Threshold* (10ns 10Hz@1064) 20J/cm² (Brewster polarizer) or 10J/cm² (PBS)
Average power Up to 1000W (Brewster polarizer ) / 500W (PBS)
Extinction Ratio(Tp : Ts) >1000 : 1
Attenuation range 0.3%-98%
Control mode Automatic
Polarizer Brewster window or PBS
Operating Temperature 10~35
Storage humidity <50%RH
P04
Specifications
Dimensions(mm)
Laser Application Devices
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