A Temperature Sensor Based on a Symmetrical Metal-Cladding Optical Waveguide

作者：Zhou Guo-Rui; Feng Guo-Ying^*; Zhang Yi; Ma Zi; Wang Jian-Jun

来源：Chinese Physics Letters, 2012, 29(2): 026501.

DOI：10.1088/0256-307X/29/2/026501

• ULTRAHIGH-ORDER MODES
• SENSITIVITY
• POLYMER
• BEAM

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 x 10(-2) deg/degrees C, 6.6 x 10 (2) deg/degrees C and 4.8 x 10(-2) deg/degrees C 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 0/20 goniometer.

• 出版日期2012-2
• 单位中国工程物理研究院; 核工业西南物理研究院; 四川大学; 中国工程物理研究院激光聚变研究中心