Experimental research of temperature sensor based on twin-core fiber

• 作 者: 赵瑞峰 裴丽 李卓轩 宁提纲 范林勇 江微微
• 机 构: Institute of Lightwave Technology, Beijing Jiaotong University,Key Laboratory of All Optical Network
• 出 处: Chinese Optics Letters
• 发表日期: 2011年06期
• 关键词: extinction splicing manufactured silica fabrication Bragg grating cladding photo

A low-cost, compact, and lossless temperature sensor based on a twin-core fiber (TCF) is demonstrated and manufactured by splicing two single-mode fibers to the ends of a TCF. The extinction ratio of the comb transmission spectrum is bigger than 15 dB, and the temperature sensitivity of the coupling angle is –0.02 rad/(°C· m) at–30–90°C and –0.032 rad/(°C· m) at 90–175°C. Finite element method is used to calculate the supermodes of the TCF, and the result agrees well with the experiment.

A low-cost, compact, and lossless temperature sensor based on a twin-core fiber (TCF) is demonstrated and manufactured by splicing two single-mode fibers to the ends of a TCF. The extinction ratio of the comb transmission spectrum is bigger than 15 dB, and the temperature sensitivity of the coupling angle is -0.02 rad / (° C · m) at -30-90 ° C and -0.032 rad / (° C · m) at 90-175 ° C. Finite element method is used to calculate the supermodes of the TCF, and the result agrees well with the experiment.