材料科学
光纤陀螺
光学
干涉测量
灵敏度(控制系统)
单模光纤
光纤传感器
双折射
保偏光纤
光纤
极化(电化学)
半径
曲率
光电子学
物理
电子工程
化学
工程类
物理化学
计算机科学
计算机安全
数学
几何学
作者
Laipeng Shao,Junhui Hu,Hanglin Lu,Jing Du,Tianyin Wu,Yiping Wang
标识
DOI:10.1007/s13320-018-0517-6
摘要
A high-sensitivity all-fiber temperature sensor based on a Sagnac interferometer is demonstrated by splicing a section of polarization maintaining fiber (PMF) between two sections of standard single mode fibers (SMFs). In this sensor, the SMF-PMF-SMF structure in the Sagnac loop is bent into a circle to enhance the sensitivity. The length and curvature of the PMF in the loop are investigated and can be optimized to further increase the temperature sensitivity of the sensor. Results show that the radius of the circle has an important effect upon temperature sensitivity due to the bend-induced birefringence variation of the PMF. The SMF-PMF-SMF structure bent into a circle with a radius of 30 mm exhibits a high-sensitivity temperature of 1.73 nm/°C. The sensor is provided with the advantages of easy fabrication, low-insertion loss, and high sensitivity, which may find potential applications in the field of high precision temperature measurement.
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