Proprietary Information Development of Buoyant Optical Fiber of... · • Only viable option for...

Linden PhotonicsProprietary Information

Development of Buoyant Optical Development of Buoyant Optical FiberFiberFiberFiber

Stephen Stephen O’RiordenO’RiordenAmareshAmaresh MahapatraMahapatraLinden Photonics, Inc.Linden Photonics, Inc.

Linden Photonics Inc.Optical µpackaging 270 Littleton Road, Unit # 29, Westford, MA 01886. Tel.: 978-392-7985; Fax:413-714-5084

Fiber Optic Tethered BuoyFiber Optic Tethered BuoyLinden PhotonicsProprietary Information

Fiber Optic Tethered Buoy Fiber Optic Tethered Buoy Antenna

Lifting BodyBuoy

Tether CableOptical Cable


SSXBT BUOY CONSTRUCTIONSSXBT BUOY CONSTRUCTION


SSXBT BUOY CONSTRUCTIONSSXBT BUOY CONSTRUCTION

Antenna

Batteries

Electronics

Sea

Main Fiber Spool

Tether Cable

Sea Keeping Coil

CableLinden Photonics Inc.

Optical µpackaging270 Littleton Road, Unit # 29, Westford, MA 01886. Tel.: 978-392-7985; Fax:413-714-5084

Main Coil DimensionsMain Coil DimensionsLinden PhotonicsProprietary Information

Main Coil DimensionsMain Coil DimensionsMin ID 1”

2 3/8” OD

5 ”

Inside Fiber

5 ”Payout

Linden Photonics Inc.Optical µpackaging

270 Littleton Road, Unit # 29, Westford, MA 01886. Tel.: 978-392-7985; Fax:413-714-5084


Basic System RequirementsBasic System Requirements

•• Long Length Long Length 20+ km20+ km

•• Positive or neutral buoyancyPositive or neutral buoyancyPositive or neutral buoyancyPositive or neutral buoyancy•• Low Optical LossLow Optical Loss 8.6 dB8.6 dB

•• High deployment speedHigh deployment speed 15 kt15 kt•• High deployment speed High deployment speed 15 + kts15 + kts



Cable Length as a Function ofCable Length as a Function ofLinden PhotonicsProprietary Information

Cable Length as a Function of Cable Length as a Function of DiameterDiameter

35404550

km)

20 km requires a cable diameter of 130 um

20253035

e Le

ngth

(k

05

1015

Cab

le

050 100 150 200 250 300

Cable Diam (um)




Achieving Neutral BuoyancyAchieving Neutral BuoyancyDesign Options InvestigatedDesign Options Investigatedg p gg p g

•• Low density JacketLow density Jacket•• IntrinsicIntrinsicIntrinsic Intrinsic •• With Filler (microWith Filler (micro--spheres)spheres)



Low Density Tight Buffer CoatingLow Density Tight Buffer CoatingLinden PhotonicsProprietary Information

Low Density, Tight Buffer CoatingLow Density, Tight Buffer Coating•• Only viable option for 130 um OD CableOnly viable option for 130 um OD CableOnly viable option for 130 um OD CableOnly viable option for 130 um OD Cable•• Requires low density polymer.Requires low density polymer.

C ti t b li d d i fib dC ti t b li d d i fib d•• Coating must be applied during fiber draw Coating must be applied during fiber draw to maintain strength.to maintain strength.

R i i l fib d i i tR i i l fib d i i t–– Requires special fiber drawing equipmentRequires special fiber drawing equipment



Fiber (glass) Diameter as a function of Jacket DensityFiber (glass) Diameter as a function of Jacket Density


Fiber (glass) Diameter as a function of Jacket Density Fiber (glass) Diameter as a function of Jacket Density Tight Buffered CableTight Buffered Cable

1

1.1

m/c

c)

0.7

0.8

0.9

dens

ity (g

m

0 4

0.5

0.6

Jack

et

0.40 10 20 30 40 50 60 70

Fiber Diameter (um)



Low density Polymer JacketLow density Polymer JacketLinden PhotonicsProprietary Information

Low density Polymer JacketLow density Polymer JacketCandidate MaterialsCandidate Materials

Polymer Density /

Modulus (k i)

Strength (k i)gm/cc (kpsi) (kpsi)

TPX MX002 0.835 114 2.9TPX MX004 0 834 255 2 9TPX MX004 0.834 255 2.9TPX RT31 0.833 270 2.9Nylon 6 1.1 420 5.8LCP 1.4 4000 100LDPE 0.92 28 1.5




TPX Coated Buoyant optical FiberTPX Coated Buoyant optical FiberFabricated under Phase I at Dunn IndustriesFabricated under Phase I at Dunn Industries

TPX Extruded over 130 um diameter Fiber

OD = 250 um

This cable floats on water !



Low Optical LossLow Optical LossLinden PhotonicsProprietary Information

Low Optical LossLow Optical Loss

•• Attenuation of total cable < 8.6 dbAttenuation of total cable < 8.6 db–– Requires < 0.4 db/km for 20 km cableRequires < 0.4 db/km for 20 km cable

•• Loss due to winding must be minimized by Loss due to winding must be minimized by increasing NA of fiberincreasing NA of fibergg



Coating SystemCoating SystemLinden PhotonicsProprietary Information

Built Under Navy Contract to explore use of low density filler materialsBuilt Under Navy Contract to explore use of low density filler materials

Curing FurnaceFurnace

Coating Cup

Capstan

Fiber Take up

Capstan



Fiber RequirementsFiber RequirementsLinden PhotonicsProprietary Information

Fiber RequirementsFiber Requirements

•• Reduced CladdingReduced Claddinggg–– Maximum Cable diameter 130 umMaximum Cable diameter 130 um

•• Bend insensitiveBend insensitiveBend insensitive Bend insensitive –– Minimum Bend Radius 10 mmMinimum Bend Radius 10 mm–– Numerical Aperture 0.17 or higherNumerical Aperture 0.17 or higher

•• High Proof Test LevelHigh Proof Test Level–– Need 200 kpsi minimumNeed 200 kpsi minimumpp

•• Low CostLow Cost




Specialty Fiber FabricationSpecialty Fiber Fabrication

Linden acquires high NA fiber from Linden acquires high NA fiber from StockerYaleStockerYale, Salem, NH, Salem, NH

•• Have manufactured 25 um dia. FiberHave manufactured 25 um dia. Fiber

•• Experienced with inExperienced with in--line extruded buffer coatings.line extruded buffer coatings.

•• Have Comprehensive test and characterizationHave Comprehensive test and characterization•• Have Comprehensive test and characterization Have Comprehensive test and characterization facilitiesfacilities



FacilitiesFacilities

In Line Coating

Optical Characterization

Mechanical TestingLinden Photonics Inc.Optical µpackaging


Linden Related WorkLinden Related WorkLinden PhotonicsProprietary Information

Linden Related WorkLinden Related WorkStrong Torpedo Fiber Optic Cable (STFOC)Strong Torpedo Fiber Optic Cable (STFOC)

•• Utilizes Linden’s Proprietary high modulus Liquid Crystal Utilizes Linden’s Proprietary high modulus Liquid Crystal Polymer (LCP) Coating Polymer (LCP) Coating

•• Small diameter Small diameter 0.014” 0.014” -- 0.030” 0.030”

•• High Strength > 100 High Strength > 100 kpsikpsi

•• Low Attenuation 0 25 dB/km @ 1550 nmLow Attenuation 0 25 dB/km @ 1550 nm•• Low Attenuation 0.25 dB/km @ 1550 nmLow Attenuation 0.25 dB/km @ 1550 nm

•• Demonstrated Deployment at 50 ft/secDemonstrated Deployment at 50 ft/sec


Miniature LCP Jacketed OpticalMiniature LCP Jacketed OpticalLinden PhotonicsProprietary Information

Miniature LCP Jacketed Optical Miniature LCP Jacketed Optical Fiber CableFiber Cable

St d d SMF 28Standard SMF 28 Fiber (250 um OD)

Extruded Vectra LCP Jacket (350 um OD)

Li d h t d d lti k l th fLinden has extruded multi km lengths of low loss (0.25 db/km) Miniature LCP jacketed cable



ExtrusionExtrusionLinden PhotonicsProprietary Information

•• Linden is working in collaboration with the Linden is working in collaboration with the ggPlastic Engineering Dept. at UMass Lowell Plastic Engineering Dept. at UMass Lowell on the development of novel fiber coating on the development of novel fiber coating p gp gtechniques. techniques.



¾” Plastic Extruder


Thank You!Thank You!Thank You!Thank You!


Proprietary Information Development of Buoyant Optical Fiber of... · • Only viable option for...

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