摘要
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.
基金
supported by the National Natural Science Foundation of China (Nos. 60837002 and61007007)
the Foundation for the Returning Scholars(No. [2008]890)
the Ph.D. Programs Foundation of Ministry of Education of China (No. 200800040002)
the Fundamental Research Funds for the Central Universities (No. 2011YJS007)
Beijing Jiaotong University Science and Technology Innovation Fund for Outstand-ing Doctoral (No. 141061522)
