# Temperature Coefficient of Femtosecond Fiber Bragg Grating (FBG) Sensor- Factory Calibration Function for 800°C FBG Thermometer, Ranging from -16 to 806°C and 524 to 1000°C - DCYS - ofscn.net

**URL:** <https://forum.ofscn.net/t/temperature-coefficient-of-femtosecond-fiber-bragg-grating-fbg-sensor-factory-calibration-function-for-800-c-fbg-thermometer-ranging-from-16-to-806-c-and-524-to-1000-c-dcys-ofscn-net/1006>\
**Category:** OFSCN Technical Knowledge Base\
**Created:** [March 7, 2026, 1:28pm UTC](https://forum.ofscn.net/t/temperature-coefficient-of-femtosecond-fiber-bragg-grating-fbg-sensor-factory-calibration-function-for-800-c-fbg-thermometer-ranging-from-16-to-806-c-and-524-to-1000-c-dcys-ofscn-net/1006 "2026-03-07T13:28:44Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**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 7, 2026, 1:28pm UTC](https://forum.ofscn.net/t/temperature-coefficient-of-femtosecond-fiber-bragg-grating-fbg-sensor-factory-calibration-function-for-800-c-fbg-thermometer-ranging-from-16-to-806-c-and-524-to-1000-c-dcys-ofscn-net/1006/1 "2026-03-07T13:28:44Z")

</div>

The OFSCN® 800°C Capillary Seamless Steel Tube Fiber Bragg Grating temperature sensor (FBG thermometer) , manufactured by DCYS, undergoes temperature calibration before leaving the factory. Along with the product, basic temperature coefficients (also known as calibration coefficients or calibration functions) of the fiber optic grating sensor are provided. The following is a brief description of the temperature calibration of the product at the time of shipment:

* * *
This is a companion discussion topic for the original entry at [https://www.ofscn.net/fbg-baike/251-temperature-coefficient-800.html](https://www.ofscn.net/fbg-baike/251-temperature-coefficient-800.html)

---

<div class="post-metadata">

**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 7, 2026, 1:28pm UTC](https://forum.ofscn.net/t/temperature-coefficient-of-femtosecond-fiber-bragg-grating-fbg-sensor-factory-calibration-function-for-800-c-fbg-thermometer-ranging-from-16-to-806-c-and-524-to-1000-c-dcys-ofscn-net/1006/2 "2026-03-07T13:28:50Z")

</div>

The temperature calibration of the **OFSCN® 800°C Fiber Bragg Grating Temperature Sensor** is a critical process to ensure measurement accuracy across such a wide thermal range.

### Technical Principles of Calibration

For high-temperature FBG sensors, particularly those using femtosecond laser-inscribed gratings, the relationship between the Bragg wavelength shift and temperature is non-linear over large spans (e.g., from room temperature to 800°C).

1. **Calibration Function:** While standard FBG sensors often use a linear coefficient for narrow ranges, the **OFSCN® 800°C FBG Temperature Sensor** typically utilizes a **polynomial (quadratic) calibration formula**:

2. **Product Features:**

### Product Reference

You can find the detailed technical specifications and the standard calibration methodology here:  
[OFSCN® 800°C Fiber Bragg Grating Temperature Sensor](https://www.ofscn.net/fbg-products/temperature-sensor-800.html)

**Standard Product Images:**

 ![BNCG-MX-51-FC-02](https://forum.ofscn.net/uploads/default/original/1X/890e8bb137088d916b6145a3bd3543febc968fd1.jpeg)

---

<div class="post-metadata">

**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 7, 2026, 1:28pm UTC](https://forum.ofscn.net/t/temperature-coefficient-of-femtosecond-fiber-bragg-grating-fbg-sensor-factory-calibration-function-for-800-c-fbg-thermometer-ranging-from-16-to-806-c-and-524-to-1000-c-dcys-ofscn-net/1006/3 "2026-03-07T13:28:50Z")

</div>