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Four-quadrant demodulation fiber sensor for wavelength monitoring of a wavelength phase-shifting interferometer
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作者 Xiaoqin Shan Xingyue Fan +3 位作者 Zhigang Han Jin Wang Fengrui Li Rihong Zhu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第8期12-17,共6页
Real-time monitoring of wavelength is important for high-speed wavelength phase-shifting interferometry.In this paper,a wavelength sensor based on a polarization-maintaining fiber interferometer with four-quadrant dem... Real-time monitoring of wavelength is important for high-speed wavelength phase-shifting interferometry.In this paper,a wavelength sensor based on a polarization-maintaining fiber interferometer with four-quadrant demodulation was proposed.We built the wavelength sensing system with resolution better than 0.005 pm and 0.1 ms sampling interval and measured the response time of the tuned wavelength at 35 ms in the phase-shifting process of a commercial wavelength phase-shifting free-space interferometer,as well as the wavelength drift velocity of 0.01 pm per second in the hysteresis process.The optical fiber wavelength sensor with four-quadrant demodulation provides a real-time wavelength sensing scheme for high-speed wavelength phase-shifting interferometers. 展开更多
关键词 optical testing wavelength phase-shifting interferometer polarization-maintaining fiber interferometer four-quadrant polarization demodulation wavelength sensing
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