- Improved Waveguide Resists Hydrogen Darkening
- Graded-Index 50/125 Fiber Structure
- Carbon/Silicone/PFA Coating System
Code -
06738-01
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 at elevated temperatures for long duration exposure. The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening, and also features a triple-layer coating system. The innermost layer is a thin carbon layer that reduces stress-fatigue by ensuring that no water can attack the surface of the silica cladding. A secondary layer of enhanced silicone dampens attenuation-inducing compressive forces and is easily strippable while the teritiary layer of PFA provides excellent chemical and abrasion resistance and low water absorption. This combination is suitable for long-term use up to 200 ºC (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance).
In addition, this fiber structure is ideal for low temperature and cryogenic applications, operating indefinitely at low temperatures.
This optical fiber is designed for distributed temperature sensing and communications in applications where hydrogen diffusion is a concern, and at elevated temperatures for long duration exposure. The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening, and also features a triple-layer coating system. The innermost layer is a thin carbon layer that reduces stress-fatigue by ensuring that no water can attack the surface of the silica cladding. A secondary layer of enhanced silicone dampens attenuation-inducing compressive forces and is easily strippable while the teritiary layer of PFA provides excellent chemical and abrasion resistance and low water absorption. This combination is suitable for long-term use up to 200 ºC (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance).
In addition, this fiber structure is ideal for low temperature and cryogenic applications, operating indefinitely at low 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
- Fatigue resistant glass structure with low friction outer coating resists chemicals, abrasion and water absorption and is easy to mechanically strip
Product Description
This optical fiber is designed for distributed temperature sensing and communications in applications where hydrogen diffusion is a concern, and at elevated temperatures for long duration exposure. The waveguide features a proprietary, hydrogen insensitive core structure to minimize the effects of hydrogen darkening, and also features a triple-layer coating system. The innermost layer is a thin carbon layer that reduces stress-fatigue by ensuring that no water can attack the surface of the silica cladding. A secondary layer of enhanced silicone dampens attenuation-inducing compressive forces and is easily strippable while the teritiary layer of PFA provides excellent chemical and abrasion resistance and low water absorption. This combination is suitable for long-term use up to 200 ºC (~ up to 20 years, performance and reliability will vary depending on installation environment. Consult Lightera for guidance).
In addition, this fiber structure is ideal for low temperature and cryogenic applications, operating indefinitely at low temperatures.
Product Specifications
| Product Specifications | |
|---|---|
| Product Description | LineaSens® Proprietary, Hydrogen Insensitive Core GI MM 50 Optical Fiber (Carbon/Silicone/PFA Coating) |
| Item Number | F80401 |
| Description | GEO50-H Geophysical Graded-Index Optical Fiber – Hydrogen Resistant, Carbon/ Silicone/PFA |
| 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 ± 1 µm |
| Cladding Non-Circularity | ≤ 2.0% |
| Core Non-Circularity | ≤ 5.0% |
| Hermetic Carbon Layer | ~ 300 to 400 Å |
| Primary Coating Diameter | 450 ± 30 µm |
| Secondary Coating Diameter | 700 ± 50 µm |
| Operating Temperature | -55 to +200 ºC |
| Short Term Excursions (24 Hours) | Up to 410 ºC |
| Coating Material | Carbon/PYROCOAT® Silicone/PFA |
| Short-Term Bend Radius (Mechanical) | ≥ 4 mm |
| Long-Term Bend Radius (Mechanical) | ≥ 4 mm |
| Proof Test Level | 200 kpsi (1.38 Gpa) |
| NOTE | *Hydrogen diffusion performance curve on right |
Image
Hydrogen Ingression Performance
| Hydrogen Ingression Performance | ||||
|---|---|---|---|---|
| Hydrogen Concentration | Partial Pressure (PSI) | Temperature (ºC) | Duration (Days) | H Induced 2 Loss @ 1060 Nm |
| 5% | 1,500 | 200 | 10 | < 0.1 dB/km |
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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