Integrated Optical Temperature Sensor

摘要

An integrated optical temperature sensor requiring no electrical connection and consisting of a parallel array of unequal arm-length waveguide interferometers in LiNbO3 has been designed and the key components have been demonstrated. The optical transmission of each interferometer varies sinusoidally with temperature with a period in inversely proportional to the path length difference between the two arms. This device has a projected range and resolution of >700 C and 0.002 C, respectively, and would be particularly useful in application requiring immunity to electrical noise.