# Fiber Bragg Grating - FBG string - Fiber Optic Grating - high/low temperature resistance - single point/multipoint - wavelength parameter customization - manufacturer's brand price - DCYS - ofscn.net

**URL:** <https://forum.ofscn.net/t/fiber-bragg-grating-fbg-string-fiber-optic-grating-high-low-temperature-resistance-single-point-multipoint-wavelength-parameter-customization-manufacturers-brand-price-dcys-ofscn-net/953>\
**Category:** Official Tech Inquiry & Product Q&A\
**Created:** [March 5, 2026, 4:32pm UTC](https://forum.ofscn.net/t/fiber-bragg-grating-fbg-string-fiber-optic-grating-high-low-temperature-resistance-single-point-multipoint-wavelength-parameter-customization-manufacturers-brand-price-dcys-ofscn-net/953 "2026-03-05T16:32:41Z")\
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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 5, 2026, 4:32pm UTC](https://forum.ofscn.net/t/fiber-bragg-grating-fbg-string-fiber-optic-grating-high-low-temperature-resistance-single-point-multipoint-wavelength-parameter-customization-manufacturers-brand-price-dcys-ofscn-net/953/1 "2026-03-05T16:32:41Z")

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Iven | www.ofscn.net Last Updated: 07 August 2025

**Product Aliases:&nbsp;** UV mask FBG, Polyimide coated FBG, high-temperature FBG, Bare FBG.

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This is a companion discussion topic for the original entry at [https://www.ofscn.net/fbg-products/polyimide-fbg.html](https://www.ofscn.net/fbg-products/polyimide-fbg.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 5, 2026, 4:32pm UTC](https://forum.ofscn.net/t/fiber-bragg-grating-fbg-string-fiber-optic-grating-high-low-temperature-resistance-single-point-multipoint-wavelength-parameter-customization-manufacturers-brand-price-dcys-ofscn-net/953/2 "2026-03-05T16:32:47Z")

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This topic covers the technical specifications and applications of **OFSCN® Polyimide Fiber Bragg Gratings / Fiber Bragg Grating Strings (bare)**.

Polyimide-coated FBGs are specifically designed for demanding environments where standard acrylate coatings would fail. Below are the core technical advantages of this product:

### Key Technical Specifications:

- **Temperature Range:** Capable of operating from **-200°C to +300°C** , making it suitable for both cryogenic and high-temperature industrial monitoring.
- **Coating Material:** High-performance polyimide recoating with a standard diameter of **155μm**.
- **Optical Fiber:** Utilizes specialized [OFSCN® SM Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html).
- **Measurement Range:** Supports a high strain range of **≤10000με**.
- **Customization:** Available as single-point sensors or multipoint FBG strings. Grating lengths are typically 3mm, 5mm, or 10mm.

### Product Images:

 ![OFSCN® Polyimide FBG String](https://forum.ofscn.net/uploads/default/original/1X/682fc3f6b5857754daa0fc674bd96009af79eb9d.png)

### Why Choose Polyimide Coating?

Unlike traditional sensors, the polyimide coating provides excellent thermal stability and chemical resistance. It is often the preferred choice for:

1. **Aerospace applications** (extreme temperature cycling).
2. **Oil and gas sensing** (high-temperature downhole environments).
3. **Medical devices** (biocompatibility and sterilization requirements).

For detailed wavelength parameters or spectral characteristics, you can view the full product page here:  
[OFSCN® Polyimide Fiber Bragg Gratings / Fiber Bragg Grating Strings (bare)](https://www.ofscn.net/fbg-products/polyimide-fbg.html)

If you have specific technical requirements regarding grating reflectivity, bandwidth, or specific spacing for multipoint strings, please feel free to provide your operating conditions for further technical discussion.

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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 5, 2026, 4:32pm UTC](https://forum.ofscn.net/t/fiber-bragg-grating-fbg-string-fiber-optic-grating-high-low-temperature-resistance-single-point-multipoint-wavelength-parameter-customization-manufacturers-brand-price-dcys-ofscn-net/953/3 "2026-03-05T16:32:47Z")

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