Laser & Optoelectronics Progress, Volume. 55, Issue 2, 020604(2018)
Study of Temperature Characteristics of the Current Sensing Fiber in Fiber Optic Current Sensor Applications
We analyze states of polarization in the fiber with different pitches and the influence of the environmental temperature on the fiber from the high-birefringence pitch and the structure of the sensing fiber. We compare the temperature characteristics of PANDA fiber, elliptical core fiber, and polarization-maintaining (PM) microstructure fiber, and make the conclusion that for a given fiber optic current sensor (FOCS), when the pitch of the sensing fiber LT is twice as long as the beat length Lp of the fiber in non-helical state, the temperature characteristic is the worst; when LT decreases, polarization-maintaining ability and anti-physical-interference ability weaken; when LT≈Lp, the sensing fiber has good temperature characteristics and strong anti-physical-interference ability. The sensing fibers with different structures have different ratio errors. Without compensation at the temperature of -40-+70 ℃, the sensing fiber based on PM microstructure fiber has a minimum value of ratio error ±0.32%.
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Dongping Zhou, Yi Dong, Yong Huang. Study of Temperature Characteristics of the Current Sensing Fiber in Fiber Optic Current Sensor Applications[J]. Laser & Optoelectronics Progress, 2018, 55(2): 020604
Category: Fiber Optics and Optical Communications
Received: Jun. 21, 2017
Accepted: --
Published Online: Sep. 10, 2018
The Author Email: Zhou Dongping (zhoudongping@gmail.com)