Physics:Thermo-optic coefficient
From HandWiki
The thermo-optic coefficient of a material is the change in refractive index with the response to temperature. This value itself also depends on the present temperature of the material and so has second-order behaviours. At low temperatures (0-400°C), the relationship is linear but at higher ones it exhibits a second-order polynomial behaviour.[1]
Applications
The relationship can be used in temperature measurement by Fibre Bragg Gratings (FBGs) where if no physical strain is applied, a Bragg's Wavelength shift of 1pm per 0.1°C temperature change can be measured. Fiber Bragg Grating Sensors
References
- ↑ Wang, Wenyuan (May 17, 2015). "Measurements of thermo-optic coefficient of standard single-mode fiber under large temperature range". 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications. doi:10.1117/12.2193091. http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2427675.
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