Static and Dynamic Performance of z-LiNbO3 Optical Temperature Sensor

Temperature serves as a critical parameter. This study introduces a z-cut lithium niobate (z-LiNbO3) optical temperature sensor, substantiated through experimental demonstrations. The static and dynamic performance of the z-LiNbO3 optical temperature sensor is evaluated through Goos-Hänchen (GH) and Imbert-Fedorov (IF) effects, examining reflectivity and sensitivity. The results indicate that the temperature resolutions of the z-LiNbO3 optical temperature sensor with linearly and circularly polarized laser beams based on the GH and IF effects are different. The optimal temperature resolution and the adjusted ${R}$ -square of the z-LiNbO3 optical temperature sensor with the circularly polarized laser beam are 0.041 °C and 0.97428 °C, respectively. The reflectivity of the z-LiNbO3 optical temperature sensor with the linearly and circularly polarized laser beam increases from 32% to 37.2%, and from 7.79% to 8.67%, respectively. The dynamic temperature resolutions of the z-LiNbO3 optical temperature sensor with the linearly and circularly polarized laser beams are 2 $^{\circ }\text{C}\,\,\times 10^{\text {-6}}\,\,^{\circ }\text{C}$ and 5 $^{\circ }\text{C}\,\,\times 10^{\text {-5}}\,\,^{\circ }\text{C}$ , respectively. The static and dynamic performance of the z-LiNbO3 optical temperature sensor, utilizing the linearly and circularly polarized laser beams, suggests advancements in the design and analysis of optical temperature sensors.