# 300 degree high temperature resistant optical fiber - Single mode polyimide optical fiber - Sensing/Communication Fiber - Picture Parameters - Manufacturer Brand Price - DCYS - ofscn.org

**URL:** <https://forum.ofscn.net/t/300-degree-high-temperature-resistant-optical-fiber-single-mode-polyimide-optical-fiber-sensing-communication-fiber-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/633>\
**Category:** Official Tech Inquiry & Product Q&A\
**Created:** [March 1, 2026, 2:33pm UTC](https://forum.ofscn.net/t/300-degree-high-temperature-resistant-optical-fiber-single-mode-polyimide-optical-fiber-sensing-communication-fiber-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/633 "2026-03-01T14:33:04Z")\
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**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\
**Post date:** [March 1, 2026, 2:33pm UTC](https://forum.ofscn.net/t/300-degree-high-temperature-resistant-optical-fiber-single-mode-polyimide-optical-fiber-sensing-communication-fiber-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/633/1 "2026-03-01T14:33:04Z")

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Iven | www.ofscn.org Last Updated: 13 February 2026

This product is a single-mode polyimide optical fiber that can withstand high temperatures and low temperatures. The coating material is polyimide, with options for doped/pure silicon core.

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This is a companion discussion topic for the original entry at [https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html)

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**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\
**Post date:** [March 1, 2026, 2:33pm UTC](https://forum.ofscn.net/t/300-degree-high-temperature-resistant-optical-fiber-single-mode-polyimide-optical-fiber-sensing-communication-fiber-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/633/2 "2026-03-01T14:33:09Z")

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The **OFSCN® 300℃ SM Polyimide Optical Fiber** is a high-performance single-mode fiber specifically designed for extreme environments, ranging from cryogenic temperatures to high heat. Unlike standard fibers with acrylate coatings that degrade above 85°C, this fiber utilizes a specialized polyimide coating to maintain structural integrity and optical performance.

### Key Technical Parameters:

- **Temperature Range:** Stable operation from **-200°C to +350°C** (with short-term excursions possible up to -270°C).
- **Fiber Geometry:** Standard 9/125 μm core/cladding diameter with a thin 155 μm coating diameter.
- **Fiber Standards:** Produced based on **G.652D** glass preforms; bend-insensitive versions (G.657 A2 or G.657 B3) are also available upon request.
- **Customization:** Options include pure silica core (for radiation resistance) and additional carbon coatings (for hydrogen/moisture resistance).

### Application Scenarios:

This fiber is primarily used in:

1. **Distributed Fiber Sensing (DTS/OFDR):** For temperature and strain monitoring in oil and gas wells or aerospace components.
2. **High-Temperature Patch Cords:** Serving as the core component for the [OFSCN® 300℃ Fiber Optic Patch Cord](https://www.ofscn.org/patch-cords/high-temperature-300.html).
3. **Industrial Communication:** Reliable data transmission in high-heat industrial processing zones.

### Product Visuals:

 ![OFSCN-300-fiber](https://forum.ofscn.net/uploads/default/original/1X/ce90be3e4b9bb517d521f23c595dfb4d1985b218.jpeg)  
 ![400-c-fiber](https://forum.ofscn.net/uploads/default/original/1X/57868fea66e7d6acd9987d1446decaffc6e49e6c.jpeg)

For detailed technical datasheets, please visit the official product page:  
[OFSCN® 300℃ SM Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html)

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**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\
**Post date:** [March 1, 2026, 2:33pm UTC](https://forum.ofscn.net/t/300-degree-high-temperature-resistant-optical-fiber-single-mode-polyimide-optical-fiber-sensing-communication-fiber-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/633/3 "2026-03-01T14:33:09Z")

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