Thermo-optic coefficient
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
[edit]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 1 pm per 0.1 °C temperature change can be measured.
This application can be used as a thermal lens-based photonic diode along with semiconductor properties with different material combinations to make a device on liquid or solid transition from aluminium-based low band gap material with act as a photonic diode with sufficient power (depending on the material choice and application) and concentration especially for higher wavelength and concentration based photonic diode. It is employed in optical microscopy, optical communication optical switching, etc.[2]
References
[edit]- ^ 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.
- ^ Babu, Mahalingam; Bongu, Sudhakara Reddy; Shetty, Pritam P.; Varrla, Eswaraiah; Reddy, G Ramachandra; Bingi, Jayachandra (1 December 2023). "Demonstration of spatial self phase modulation based photonic diode functionality in MoS2/h-BN medium". Materials Science in Semiconductor Processing. 168: 107831. arXiv:2309.09209. doi:10.1016/j.mssp.2023.107831. ISSN 1369-8001.