- Improved Waveguide Resists Hydrogen Darkening
- Graded-Index 50/125 Fiber Structure
- PYROCOAT® K Coating Industry-Leading Thermal Stability
Code -
06735-01
LineaSens® Proprietary, Hydrogen Insensitive Core Graded-Index Multimode 50 µm Optical Fiber
This optical fiber is designed for distributed temperature sensing and communications in applications where hydrogen diffusion is a concern, and in temperatures up to 293 ºC for long durations (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance). The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening and also features a thin, hard, polyimide coating for excellent chemical resistance and thermal stability at elevated temperatures.
This optical fiber is designed for distributed temperature sensing and communications in applications where hydrogen diffusion is a concern, and in temperatures up to 293 ºC for long durations (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance). The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening and also features a thin, hard, polyimide coating for excellent chemical resistance and thermal stability at elevated temperatures.
Features
Benefits
- Minimizes permanent losses due to hydrogen ingression in harsh conditions
- Compatible with most commercially available Distributed Temperature Sensing (DTS) interrogators; can also be fusion spliced to similar hydrogen insensitive core optical fiber, and traditional lead-in optical fibers
- Thin, hard coating provides excellent thermal stability, plus chemical and abrasion resistance in a small cross-section of 155 µm
Product Description
This optical fiber is designed for distributed temperature sensing and communications in applications where hydrogen diffusion is a concern, and in temperatures up to 293 ºC for long durations (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance). The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening and also features a thin, hard, polyimide coating for excellent chemical resistance and thermal stability at elevated temperatures.
Product Specifications
| Product Specifications | |
|---|---|
| Product Description | LineaSens® Proprietary, Hydrogen Insensitive Core GI MM 50 Optical Fiber (PYROCOAT® K Coating) |
| Item Number | F80403 |
| Description | GEO50-H Geophysical Graded-Index Optical Fiber – Hydrogen Resistant, PYROCOAT* K |
| Type | Multimode Graded-Index |
| Numerical Aperture | 0.20 |
| Attenuation @ 850 nm | ≤ 4.0 dB/km |
| Attenuation @ 1300 nm | ≤ 2.0 dB/km |
| Bandwidth OFL @ 850 nm | ≥ 400 Mhz-km |
| Bandwidth OFL @ 1300 nm | ≥ 400 Mhz-km |
| Core Diameter | 50 ± 3 µm |
| Clad Diameter | 125 ± 2 µm |
| Coating Diameter | 155 ± 5 µm |
| Cladding Non-Circularity | ≤ 2.0% |
| Core Non-Circularity | ≤ 5.0% |
| Hermetic Carbon Layer | None |
| Operating Temperature | -198 to +340 ºC |
| Short Term Excursions (24 hrs.) | Up to 450 ºC |
| Coating Material | PYROCOAT K |
| Short-Term Bend Radius (Mechanical) | ≥ 8 mm |
| Long-Term Bend Radius (Mechanical) | ≥ 10 mm |
| Proof Test Level | 200 kpsi (1.38 Gpa) |
| Note | * Hydrogen diffusion performance curve on right |
Hydrogen Ingression Performance
| Hydrogen Ingression Performance | ||||
|---|---|---|---|---|
| Hydrogen Concentration | Partial Pressure (PSI) | Temperature (ºC) | Duration (Days) | H2 Induced Loss @ 1060 Nm |
| 5% | 1,500 | 250 | 23 | < 1.0 dB/km |
| 5% | 1,500 | 350 | 10 | < 1.0 dB/km |
Image
Comparison
| Comparison | ||
|---|---|---|
| Item | Commercially Available Polyimide-Coated Fibers | PYROCOAT® K |
| Lifetime at 275 ºC | 4 years | 80 years |
| Lifetime at 300 ºC | 0.8 years | 13 years |
| Lifetime at 325 ºC | 70 days | 2.2 years |
| Lifetime at 350 ºC | 18 days | 160 days |
| 20-year Continuous Upper Use Temperature | 250 ºC | 293 ºC |
| Fiber/Metal Interaction at 300 ºC | Fiber sticks to metal | Fiber does not stick to metal |
| Aging in distilled water, 200ºC, 2000 psi, 7 days | Coating material degrades | No coating degradation |
| Aging in sea water, 100ºC, 2000 psi, 14 days | No coating degradation | No coating degradation |
| Aging in mineral oil, 250ºC, 2000 psi, 10 days | No coating degradation | No coating degradation |
| Aging in isopropanol, 250ºC, 1500 psi, 7 days | No coating degradation | No coating degradation |
| The lifetimes are based on 25% loss of the initial coating mass criterion. For details, see A. A. Stolov, D. A Simoff, J. Li, Thermal Stability of Specialty Optical Fibers. J. Lightwave Technol., 2008, V 26, N 20, P. 3443-3451. | ||
Contact Information
For additional information please contact your sales representative. You can also visit our website at www.lightera.com or call 1-888-FIBERHELP (1-888-342-3743) USA or 1-770-798-555 outside the USA. For a full list of our certifications, visit our website.
Trademark Notice and Disclaimer
Lightera reserves the right to make changes to the product(s) described in this document at any time without notice. This document is for informational purposes only and is not intended to modify or supplement any Lightera warranties or specifications relating to any of its products or services.
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