Fiber tension sensor is a fiber sensing system for measuring strain and stress,and it has significant commercial and military value.One of the traditional fiber tension sensors can be used to monitor the deformation of buildings,and is also known as SOFO.It uses Michelson interferometer as signal demodulator.Its response time is long as scanning is needed.In order to solve this problem,fiber tension sensors using microwave as subcarrier is presented.However,the optical circulator used in it brings large error,which makes the performance unsatisfactory.The error sources was analyzed,and optical coupler and phase comparator were used to replace the optical circulator and the multiplier.Good experiment result has been gotten.
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夏超,周柯江.使用微波作为副载波的光纤应力传感器[J].激光与红外,2015,45(6):689~692 XIA Chao, ZHOU Ke jiang. Fiber tension sensor using microwave as subcarrier[J]. LASER & INFRARED,2015,45(6):689~692