Fiber Optic Cable Preparation to Ensure Stable Operation Ensure - - PowerPoint PPT Presentation

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Fiber Optic Cable Preparation to Ensure Stable Operation Ensure - - PowerPoint PPT Presentation

Nov 15, 2022 203 likes •404 views

Fiber Optic Cable Preparation to Ensure Stable Operation Ensure Stable Operation Richard F. Chuska, William J. Thomes Jr., Melanie N. Ott, Frank V. LaRocca, Robert C. Switzer, Shawn L. Macmurphy SPIE Optics + Photonics 2008 Overview How

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SLIDE 1

Fiber Optic Cable Preparation to Ensure Stable Operation Ensure Stable Operation

Richard F. Chuska, William J. Thomes Jr., Melanie N. Ott, Frank V. LaRocca, Robert C. Switzer, Shawn L. Macmurphy

SPIE Optics + Photonics 2008

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SLIDE 2

Overview

  • How to properly precondition a fiber optic cable
  • Performance of different types of fiber optic cables

that are properly prepared

  • What happens when you do not properly

precondition the fiber optic cable

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SLIDE 3

Fiber Optic Cables

  • TEQS Powerflex hard-polymer coated

– 365/400/425 (TEQS)/730 (TEFZEL buffer) – Manufactured by InnovaQuartz

  • Flexlite

– 400/440 Step Index Fiber – 400/440 Step Index Fiber – E-PTFE buffer, Kevlar aramid braid, fluoropolymer jacket – Manufacture by W. L. Gore

  • International Space Station Fiber

– 100/140 Graded Index Carbon Coated – Fiberglass with Teflon coating, polymer jacket – Manufactured by Brand-Rex Company

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SLIDE 4

Fiber Optic Cables

  • SMF with 1.8 mm PEEK

– 9/125/250 SM fiber – Expanded PTFE, PEEK tube, aramid strength members, outer polymer jacket – Manufactured by W. L. Gore

  • MTP cable
  • MTP cable

– Mylar lamination, E-PTFE wrap, Kevlar strength member, outer polymer jacket – Manufactured by W. L. Gore

  • Strong Tether Fiber Optic Cable (STFOC)

– 9/125 SM fiber with acrylate coating – Proprietary secondary buffer – Manufactured by Linden Photonics

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SLIDE 5

Cable Terminations

  • FC connectors

– 2.5 mm ferrule

  • Ceramic outside
  • Metal insert

– Keyed to adapter

  • Cable connected to back of connector

– Metal crimp sleeve – Cable strength members (Kevlar) crimped

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SLIDE 6

Thermal Preconditioning

  • Cable lengths: 1, 3, and 6 meters
  • Thermal Profile

– -30°C to 130°C

60.00 80.00 100.00 120.00 140.00 ature (°C)

Temperature Profile for Preconditioning

– -30°C to 130°C – 2°C/min – 1 hour dwell at extremes

  • Cables were removed from thermal chamber and

measured periodically during preconditioning study

  • 40.00
  • 20.00

0.00 20.00 40.00 60.00 0.00 500.00 1000.00 1500.00 2000.00 2500.00 3000.00 Temperatur Elapsed Time (min)

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SLIDE 7

Thermal Preconditioning

1.50% 2.00% 2.50% 3.00%

gth compared to Initial Length (%)

Flexlite 1413 (6 m) Flexlite 1413 (3 m) Flexlite 1413 (1 m) SMF28 PEEK (6 m) SMF28 PEEK (3 m) SMF28 PEEK (1 m) ISS Cable (6 m) ISS Cable (3 m) 0.00% 0.50% 1.00% 10 20 30 40 50 60 70 80 90 100

Change in Cable Length Number of Thermal Cycles

ISS Cable (1 m) W.L. Gore 1997 MT (6 m) W.L. Gore 1997 MT (3 m) W.L. Gore 1997 MT (1 m) TEQS 365/400 (6 m) TEQS 365/400 (3 m) TEQS 365/400 (1 m) STFOC SMF28 (6 m)

Thermal precondition until cable length stabilizes Shorter cables show a greater percentage change in cable length

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SLIDE 8

Thermal Preconditioning

6 8 10 12

Change in Length (cm)

Flexlite 1413 (6 m) Flexlite 1413 (3 m) Flexlite 1413 (1 m) SMF28 PEEK (6 m) SMF28 PEEK (3 m) SMF28 PEEK (1 m) ISS Cable (6 m) ISS Cable (3 m) ISS Cable (1 m)

Cable termination stability is determined by length change at connector Longer cable show an overall greater change in length

2 4 10 20 30 40 50 60 70 80 90 100

Overall Cha Thermal Cycles

ISS Cable (1 m) W.L. Gore 1997 MT (6 m) W.L. Gore 1997 MT (3 m) W.L. Gore 1997 MT (1 m) TEQS 365/400 (6 m) TEQS 365/400 (3 m) TEQS 365/400 (1 m) STFOC SMF28 (6 m)

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SLIDE 9

Thermal Preconditioning

  • Fibers must be cut to length before they are

preconditioned

  • Cables must be subjected to thermal cycling until

shrinkage has stabilized

Flexlite cable MTP cable ISS cable

Cable Shrinkage during Preconditioning

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SLIDE 10

Fiber Cable Performance

Optical Sources Fiber Splitter

850 nm 1310 nm 1550 nm

Thermal Chamber

Source

1550 nm

Multi-channel Detector

Source Monitor

Thermal Monitor

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SLIDE 11

Fiber Cable Performance

30 40 50 60 70 80 90 100 110 120 130 0.00 0.05 0.10 0.15 0.20 0.25 mperature (°C) lized Insertion Loss (dB/m) Flexlite (1m) 850 nm Flexlite (3m) 850 nm Flexlite (6m) 850 nm TEQS (1m) 850 nm

  • 50
  • 40
  • 30
  • 20
  • 10

10 20 30

  • 0.25
  • 0.20
  • 0.15
  • 0.10
  • 0.05

1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Tempe Length Normalized Elapsed Time (min) TEQS (1m) 850 nm TEQS (3m) 850 nm TEQS (6m) 850 nm Temperature

  • 50°C to 125°C, 2°C/min, 60 min dwell at extremes
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SLIDE 12

Fiber Cable Performance

30 40 50 60 70 80 90 100 110 120 130 0.00 0.05 0.10 0.15 0.20 0.25 perature (°C) ized Insertion Loss (dB/m) SMF28 PEEK (1m) 1550 nm SMF28 PEEK (6m) 1550 nm SMF28 PEEK (3m) 1550 nm STFOC SMF28 (6m) 1550 nm

  • 50°C to 125°C, 2°C/min, 60 min dwell at extremes
  • 50
  • 40
  • 30
  • 20
  • 10

10 20 30

  • 0.25
  • 0.20
  • 0.15
  • 0.10
  • 0.05

2000 4000 6000 8000 10000 Temper Length Normalized Elapsed Time (min) STFOC SMF28 (6m) 1550 nm ISS (1m) 850 nm ISS (3m) 850 nm ISS (6m) 850 nm Temperature

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SLIDE 13

Fiber Cable Performance

40 60 80 100 120 140 0.05 0.10 0.15 0.20 0.25 perature (°C) zed Insertion Loss (dB/m) Flexlite (1m) 850 nm Flexlite (3m) 850 nm Flexlite (6m) 850 nm

  • 60
  • 40
  • 20

20

  • 0.15
  • 0.10
  • 0.05

0.00 500 1000 1500 2000 2500 3000 Tempera Length Normalized I Elapsed Time (min) Flexlite (1m) 1310 nm Flexlite (3m) 1310 nm Flexlite (6m) 1310 nm Temperature

Insertion Loss change is slightly wavelength dependent

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SLIDE 14

Preconditioned versus Non-Preconditioned

40 60 80 100 120 140 1.00 1.50 2.00 2.50 rature (°C) n Loss (dB) ISS 1m Preconditioned ISS 3m Preconditioned

  • 50°C to 125°C, 2°C/min, 60 min dwell at extremes

Test conducted at 850 nm

  • 60
  • 40
  • 20

20 40

  • 0.50

0.00 0.50 1.00 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Temperatu Insertion Lo Elapsed Time (min) ISS 3m Preconditioned ISS 6m Preconditioned ISS 1m Nonpreconditioned ISS 3m Nonpreconditioned Temperature

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SLIDE 15

Preconditioned versus Non-Preconditioned

40 60 80 100 120 140 15.00 20.00 25.00 30.00 35.00 rature (°C) n Loss (dB) SMF PEEK 1m Preconditioned SMF PEEK 3m Preconditioned

  • 60
  • 40
  • 20

20 40

  • 5.00

0.00 5.00 10.00 15.00 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Temperatu Insertion Lo Elapsed Time (min) SMF PEEK 3m Preconditioned SMF PEEK 6m Preconditioned SMF PEEK 1m Nonpreconditioned SMF PEEK 3m Nonpreconditioned Temperature

  • 50°C to 125°C, 2°C/min, 60 min dwell at extremes

Test conducted at 1550 nm

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SLIDE 16

Summary

  • Most fiber optic cables will shrink
  • Fiber cables must be cut to length before

preconditioning

  • Thermal cycling is required to properly precondition

the fiber cable the fiber cable

  • Temperatures will depend upon mission
  • Number of cycles will depend upon cable
  • This step early in the manufacturing process can

mean the difference between mission success and failure

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SLIDE 17

Problems to Avoid

YOU DON’T WANT THIS TO HAPPEN TO HAPPEN TO YOU

Fiber optic cable

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SLIDE 18

Acknowledgements

Funding for this study provided by: NASA Electronic Parts and Packaging (NEPP) Program http://nepp.nasa.gov

For additional information please see our website http://misspiggy.gsfc.nasa.gov/photonics