# 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/659>\
**Category:** Official Tech Inquiry & Product Q&A\
**Created:** [March 2, 2026, 2:55am 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/659 "2026-03-02T02:55:37Z")\
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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 2, 2026, 2:55am 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/659/1 "2026-03-02T02:55:37Z")

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Iven | www.ofscn.org Last Updated: 01 March 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%20%e8%bf%99%e4%b8%80%e6%ac%be](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html%20%e8%bf%99%e4%b8%80%e6%ac%be)

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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 2, 2026, 2:55am 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/659/2 "2026-03-02T02:55:42Z")

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This high-temperature resistant optical fiber is a core product in our specialty fiber line, specifically designed for extreme environments where standard acrylate coatings would fail.

### Technical Overview of OFSCN® 300℃ SM Polyimide Optical Fiber

The [OFSCN® 300℃ SM Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html) utilizes a specialized polyimide coating that maintains structural integrity and optical performance across a vast temperature gradient.

**Key Technical Specifications:**

- **Operating Temperature:** -200℃ to +350℃ (Excursions up to 400℃).
- **Fiber Geometry:** 9μm Core / 125μm Cladding / 155μm Coating.
- **Core Material:** Standard doped core (pure silica core available for radiation resistance or specific sensing needs).
- **Standards:** Based on G.652D; bend-insensitive versions (G.657 A2/B3) are also available upon request.

**Product Visuals:**

 ![OFSCN® 300℃ Polyimide Fiber](https://forum.ofscn.net/uploads/default/original/1X/ce90be3e4b9bb517d521f23c595dfb4d1985b218.jpeg)  
 ![OFSCN® High Temp Fiber Detail](https://forum.ofscn.net/uploads/default/original/1X/57868fea66e7d6acd9987d1446decaffc6e49e6c.jpeg)

### Why Polyimide Coating?

Unlike traditional buffers, polyimide is chemically bonded to the glass cladding. This prevents the “piston effect” and ensures minimal signal attenuation even at 300°C. It is the industry standard for:

1. **Distributed Fiber Optic Sensing (DTSS/DTS):** Providing accurate strain and temperature transfer.
2. **Aerospace & Oil/Gas:** Reliable communication in high-heat zones.
3. **Medical Sterilization:** Withstanding repeated autoclaving cycles.

For applications requiring even higher mechanical protection, this fiber is often integrated into our [OFSCN® 300°C Distributed Fiber Temperature Sensor](https://www.ofscn.org/dofs/300-c-ofdr-strain-sensor.html), which adds a seamless stainless steel tube jacket.

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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 2, 2026, 2:55am 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/659/3 "2026-03-02T02:55:42Z")

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