摘要
A compact temperature sensor based on a symmetrical metal-cladding optical waveguide using free-space coupling is proposed and demonstrated theoretically and experimentally.The symmetrical Au-cladding optical waveguide is based on a thin LiNbO3 slab sandwiched between two metal films,which serve as the coupling layer and reflecting panel,respectively.The sensitivity of this sensor of 9.08 × 10^(-2) deg/℃,6.6 × 10^(-2) deg/℃ and 4.8 × 10^(-2) deg/℃ corresponding to 3238-order,3237-order and 3236-order modes,respectively,are obtained.Higher resolution is predicted with a larger linear expansion coefficient material and a higher resolution θ/2θ goniometer.
作者
周国瑞
冯国英
张一
马孜
王建军
ZHOU Guo-Rui;FENG Guo-Ying;ZHANG Yi;MA Zi;WANG Jian-Jun(Department of Opto-Electronics,College of Electronics and Information Engineering,Sichuan University,Chengdu 610064;Southwest Institute of Technical Physics,Chengdu 610041;Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10876022,60890200 and 10976017.
