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

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2012,（2）
• 页码范围: 163-165
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0256-307X/29/2/026501

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.