Limits to the Exponential Advances in DWDM Filter Technology?
Transcript of Limits to the Exponential Advances in DWDM Filter Technology?
Limits to the Exponential Advancesin DWDM Filter Technology?
DARPA/MTO WDM for Military PlatformsDARPA/MTO WDM for Military PlatformsDARPA/MTO WDM for Military PlatformsDARPA/MTO WDM for Military PlatformsApril 18-19, 2000April 18-19, 2000April 18-19, 2000April 18-19, 2000
McLeanMcLeanMcLeanMcLean, VA, VA, VA, VA
Philip J. AnthonyE-TEK Dynamics
San Jose CA
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1. REPORT DATE 18 APR 2000
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4. TITLE AND SUBTITLE Limits to the Exponential Advances in DWDM Filter Technology?
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7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) E-TEK Dynamics San Jose, CA
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13. SUPPLEMENTARY NOTES DARPA/MTO, WDM for Military Platforms Workshop held in McLean, VA on April 18-19, 2000, Theoriginal document contains color images.
14. ABSTRACT
15. SUBJECT TERMS
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Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18
Limits to the Exponential Advancesin DWDM Filter Technology?
DARPA/MTO WDM for Military Platforms
• Progress in DWDM Filtering Technology! Thin Film Filters! Arrayed Waveguide Gratings! Holographic Gratings
• Interleaver Status• Roadmap for the Near Future
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TECHNOLOGY PROGRESS
Gas turbineSteam turbine
FlourescentCharles ParsonsT riple expansion
Cornish II
Cornish IJames Wat t II
James Wat t I
T homas Newcomen
T homas Savery
GaAs diode
Steam turbine
MercurySodium
T ungsten filament
Celulose filament
Edison's first lamp
Paraffin candle
10 Gb/s @25 GHz
10 Gb/s @50 GHz
10 Gb/s @100 GHz
4 x 10Gb/s
8 x 2.5Gb/s
0%
1%
10%
100%
1700 1750 1800 1850 1900 1950 2000 2050
RES
OU
RC
E EF
FIC
IEN
CY
Steam Engines 1
Lamps 1
DWDMSystems
0.1%
1) Jesse H. Ausubel, "Where is Energy Going?", The Industrial Physicist, Vol. 6 (1), p. 17 (Feb. 2000). pja 3/2/00
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0%10%20%30%40%50%60%70%80%90%
1997 1998 1999 2000 2001
Yiel
ds
400 GHz 200 GHz 100 GHz 50 GHz
Industry Filter Yield ImprovementsIndustry Filter Yield ImprovementsIndustry Filter Yield ImprovementsIndustry Filter Yield Improvements
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50GHz DWDM Spectrum-Transmission
-35-30-25-20-15-10-50
1545 1547 1549 1551 1553 1555 1557
Wavelength (nm)
IL (d
B)
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-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
1556.0 1556.5 1557.0 1557.5 1558.0Wavelength (nm)
Tran
smis
sion
(dB
)
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
Tran
smis
sion
(dB
)
100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes100 GHz Filter Shapes
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0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0 1 2 3 4 5 6
REFLECT CHANNEL (ISOLATION) WIDTH (nm)
PASS
CH
ANN
EL W
IDTH
(nm
)
0.0
0.2
0.4
0.6
0.8
1.0
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1.6
50% FILL FACTOR
1998
1997
400 GHz
200 GHz
100% FILL FACTOR
100 GHz
50 GHz
1999
100 GHz
1998
19992000
?
200 GHz
200 GHz
100 GHz
1996
1999
DWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESSDWDM THIN FILM FILTER PROGRESS
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AWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUXAWG DWDM MUX & DEMUX
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-60
-50
-40
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-10
0
10
1552 1553 1554 1555 1556
M=60M=100M=140
wavelength (nm)
Loss
(dB)
Sidelobes v.s. Waveguide Numbers
Basic Performance of an AWG
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Basic Waveguide Structure
Silicon-on-SiliconSilicon-on-SiliconSilicon-on-SiliconSilicon-on-Silicon((((Bookham Bookham Bookham Bookham Technology)Technology)Technology)Technology)
•easier to manufacture, Si-CMOS process•pure semiconductorwaveguide, small bendingradius, small chip size• difficult to package dueto mode miss-match•few vendors, little R&D•offer lowest X-Talk•further integration, OEIC
Si-Substrate
SiO2 BufferSi-Waveguide
SiO2 Cladding
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Packaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWGPackaged Silicon AWG
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-45
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-15
-10
-5
1527 1532 1537 1542 1547 1552 1557 1562Wavelength (nm)
Inse
rtio
n L
oss
(-dB
)Typical Spectrum of Packaged AWG ModuleTypical Spectrum of Packaged AWG ModuleTypical Spectrum of Packaged AWG ModuleTypical Spectrum of Packaged AWG Module
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Holographic grating DWMHolographic grating DWM
Simple structure, high channel count
Planar waveguideswithS-bends
Concave holographicgrating
12-15 cm
~3 cm
λλλλ1 , , , , λλλλ2 , , , , ............ λλλλN
λλλλ5
λλλλN
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Holographic Grating AttributesHolographic Grating Attributes
•High channel count, yet completelypassive
•High isolation >40 dB•Less developed than PAWG
Issues:!Channel uniformity!Passband flatness!Polarization-dependent loss
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Measured HG Response (Not Flattened)Measured HG Response (Not Flattened)
50 channels @ 100 GHz, not flattened
1525 1530 1535 1540 1545 1550 1555 1560 1565-50
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-5
0Channels passbands
wavelength, nm
Tran
smis
sion
, dB
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Basic Michelson-Gires-Basic Michelson-Gires-TournoisTournois Interleaver Structure Interleaver Structure
EEEEreflreflreflrefl
After Dingel and Aruga, JLT vol. 17(8), pp. 1461, 1999.
L1 = 2L2
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Packaged Prototype 25-GHz InterleaverPackaged Prototype 25-GHz Interleaver
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25-GHz Interleaver Characteristics25-GHz Interleaver Characteristics
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-15
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1550 1551 1552 1553 1554 1555
Wavelength (nm)
Rel
ativ
e Po
wer
(dB
)
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25-GHz Interleaver Characteristics25-GHz Interleaver Characteristics
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1551.5 1552 1552.5 1553 1553.5 1554
Wavelength (nm)
Rel
ativ
e Po
wer
(dB
)
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25-GHz Interleaver Characteristics25-GHz Interleaver Characteristics(Insertion Loss ~ 2 dB)(Insertion Loss ~ 2 dB)
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1552 1552.2 1552.4 1552.6 1552.8 1553
Wavelength (nm)
Rel
ativ
e Po
wer
(dB
)
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System Demo with KestrelSystem Demo with Kestrel
• Using a 25-GHz interleaver and 10-Gbpsoptical FDM systems, a two-channel ultra-dense WDM system was demonstrated.
• BERs down to 10-12 were achieved.• No BER floor observed.• Power penalty due to interleaver was
negligible.
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Optical Frequency Division Multiplexing (Kestrel)Optical Frequency Division Multiplexing (Kestrel)
PhotoDetector
Laser OpticalModulator
f1
...Combiner
Enco
de a
ndM
odul
ate
Enco
de a
ndM
odul
ate
Enco
de a
ndM
odul
ate
fN
s1 s2 sN
Amp & BPF
f2 f1
...Splitter
Dem
odul
ate
and
Dec
ode
Dem
odul
ate
and
Dec
ode
Dem
odul
ate
and
Dec
ode
fN
s1 s2 sN
Amp & BPF
f2
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Spectra For Three Different Methods Of Transmitting 10 GbpsSpectra For Three Different Methods Of Transmitting 10 Gbps
TDM:OC-192
DWDM:4 OC-48’s
Optical FDM
20 GHz
50 GHz
Less than 20 GHz(Kestrel)(Kestrel)(Kestrel)(Kestrel)(Kestrel)(Kestrel)(Kestrel)(Kestrel)
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DWDM System BERDWDM System BER
1.E-13
1.E-12
1.E-11
1.E-10
1.E-09
1.E-08
1.E-07
0 0.5 1 1.5 2 2.5 3
Relative Received Optical Power (dB)
Bit
Erro
r Rat
e
193.081 193.055Laser frequency (THz):
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Impact of Interleaver on BERImpact of Interleaver on BER
1.E-11
1.E-10
1.E-09
1.E-08
1.E-07
0.0 0.5 1.0 1.5 2.0
Relative Received Optical Power (dB)
Bit E
rror R
ate
EDFA, no interleaverEDFA & interleaverNo interleaver & no EDFA
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INTERLEAVER DISPERSIONINTERLEAVER DISPERSION
E-TEK Interleaver Dispersion Measurement
10
20
30
40
50
1540 1541 1542 1543 1544 1545
wavelength (nm)De
lay
(ps)
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-10
-5
0
Tran
smis
sion
(dB)
Group Delay Transmission
Other Interleaver Dispersion Measurement
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0
1542.5 1543.5 1544.5 1545.5 1546.5 1547.5
wavelength (nm)
Dela
y (p
s)
-40
-30
-20
-10
0
tran
smis
sion
(dB)
Delay Transmission
Special Thanks to Agilent Technologies: R. Fortenberry, F. Liang, A. Nooriala, J. Zhang for dispersion measurement
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Less Than 1ps DGDLess Than 1ps DGD
E-TEK Interleaver Dispersion Measurement
25
26
27
28
29
30
31
32
33
34
35
1542.3 1542.7 1543.1 1543.5 1543.9
wavelength (nm)De
lay
(ps)
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-15
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-5
0
Tran
smis
sion
(dB)
Group Delay Transmission
E-TEK Interleaver Dispersion Measurement
10
20
30
40
50
1540 1541 1542 1543 1544 1545
wavelength (nm)
Dela
y (p
s)
-50
-45
-40
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-20
-15
-10
-5
0
Tran
smis
sion
(dB)
Group Delay Transmission
Special Thanks to Agilent Technologies: R. Fortenberry, F. Liang, A. Nooriala, J. Zhang for dispersion measurement
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Temperature Dependent of Type II 100 GHz Interleaver
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Frequency (GHz ref. @ 194000 GHz)
Tran
smis
sion
(dB
)
Temp=23 Temp=60
Interleaver Temperature DependenceInterleaver Temperature Dependence
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DWDM Component Development Road MapDWDM Component Development Road Map
19991999199919991999199919991999 20002000200020002000200020002000 20012001200120012001200120012001
InterleaverInterleaverInterleaverInterleaverInterleaverInterleaverInterleaverInterleaver
Thin FilmThin FilmThin FilmThin FilmThin FilmThin FilmThin FilmThin Film
AWGAWGAWGAWGAWGAWGAWGAWG
Diffraction GratingDiffraction GratingDiffraction GratingDiffraction GratingDiffraction GratingDiffraction GratingDiffraction GratingDiffraction Grating
Add/DropAdd/DropAdd/DropAdd/DropAdd/DropAdd/DropAdd/DropAdd/Drop
Wavelength LockerWavelength LockerWavelength LockerWavelength LockerWavelength LockerWavelength LockerWavelength LockerWavelength Locker
100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz 50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz
100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz
40 ch40 ch40 ch40 ch40 ch40 ch40 ch40 ch 80 ch80 ch80 ch80 ch80 ch80 ch80 ch80 ch
40 ch40 ch40 ch40 ch40 ch40 ch40 ch40 ch 80 ch80 ch80 ch80 ch80 ch80 ch80 ch80 ch
config 2 chconfig 2 chconfig 2 chconfig 2 chconfig 2 chconfig 2 chconfig 2 chconfig 2 ch
50 50 50 50 50 50 50 50 GHzGHzGHzGHzGHzGHzGHzGHz???????? 25 25 25 25 25 25 25 25 GHzGHzGHzGHzGHzGHzGHzGHz????????
Fiber GratingFiber GratingFiber GratingFiber GratingFiber GratingFiber GratingFiber GratingFiber Grating 50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz Dispersion CompensationDispersion CompensationDispersion CompensationDispersion CompensationDispersion CompensationDispersion CompensationDispersion CompensationDispersion Compensation
25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz
developmentdevelopmentdevelopmentdevelopmentdevelopmentdevelopmentdevelopmentdevelopmentproductionproductionproductionproductionproductionproductionproductionproduction researchresearchresearchresearchresearchresearchresearchresearchKEY:KEY:KEY:KEY:KEY:KEY:KEY:KEY:
4/3/00
config 32 chconfig 32 chconfig 32 chconfig 32 chconfig 32 chconfig 32 chconfig 32 chconfig 32 chconfig 4 chconfig 4 chconfig 4 chconfig 4 chconfig 4 chconfig 4 chconfig 4 chconfig 4 ch config 16 chconfig 16 chconfig 16 chconfig 16 chconfig 16 chconfig 16 chconfig 16 chconfig 16 ch
100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz100 GHz
PMD ControlPMD ControlPMD ControlPMD ControlPMD ControlPMD ControlPMD ControlPMD Control
50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz50 GHz25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz25 GHz
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OPTICAL NETWORK EVOLUTIONOPTICAL NETWORK EVOLUTION
0%
100%
0% 100%
Networking Funtionality in the Optical Layer
Shar
e of
Tra
nspo
rt M
arke
t
Rel
ativ
e Pr
ice
/ Per
form
ance
NOWFUTUREPRICE / PERFORMANCE
MESH OF DWDM PIPES
FIXED ADD / DROP
CONFIGURABLE ADD / DROP OXC
Networking Functionality in the Optical LayerNetworking Functionality in the Optical Layer
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