论文题目：Large measurement range and high sensitivity temperature sensor with FBG

cascaded Mach-Zehnder interferometer

作者：仝锐杰

发表刊物：Optics and Laser Technology

论文收录：SCI

论文摘要：A high sensitivity and wide measurement range temperature sensor with Mach-Zehnder interferometer (MZI) and fiber Bragg grating (FBG) cascaded is proposed and experimentally implemented. The proposed MZI is fabricated by inserting a section of single mode fiber between two sections of single mode fibers with 62μm coreoffset, where the length of the inserted fiber is 300μm. Polydimethylsiloxane (PDMS), as a kind of thermosensitive material, is covered on core-offset region. Meanwhile, FBG is adopted to enlarge the measurement range. Temperature experiment results turn out to be fruitful for improving the performance of sensitivity and measurement range, and the sensitivity of proposed sensor is up to 10.389nm/°C from 10°C to 59.4°C with good linearity. Moreover, the exhaustively comparison with other optical fiber interferometers reveals that the proposed sensor is simple making, miniature size, good reproducibility, high sensitivity and large measurement range, which has tempting commercial prospect.

Fig.  Sensing structure and the linear relationship of spectrum of proposed sensor and temperature.