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	Performance Optimization of Fiber Optic Interferometric Accelerometer Based on Phase Noise Analysis
	Yang, Yue1; Wang, Zhongmin1,2; Chang, Tianying1; Cheng, Liyao2; Yu, Miao2,3; Cui, Hong-Liang1,4
	2019-11-15
摘要	The phase noise of a Michelson interferometer-based fiber optic accelerometer is analyzed to determine the optimal modulation depth of the laser light frequency and the length difference between the interference arms. The output intensity fluctuation of the interferometer, originating from the phase noise of the modulated laser source, is examined theoretically, revealing that both the interference intensity noise power and the phase modulation depth of the interferometer are proportional to the frequency modulation depth of the laser and the interference arm length difference. In addition, it is determined experimentally that the laser linewidth, or equivalently, the laser phase noise, varies approximate linearly with the light frequency. As the optimum phase modulation depth is a constant, the interference intensity noise power has a minimum value, when the light frequency modulation depth is at its maximum. The proposed theory is demonstrated experimentally, with results showing that a high-performance broadband fiber optic interferometric accelerometer achieves the lowest noise level when the light frequency modulation depth of the source laser is at its maximum value.
关键词	Differential phase noise fiber optic accelerometer interference arm length difference Michelson interference modulation depth
DOI	10.1109/JSEN.2019.2929763
发表期刊	IEEE SENSORS JOURNAL
ISSN	1530-437X
卷号	19期号:22页码:10498-10505
通讯作者	Chang, Tianying(tchang@jlu.edu.cn)
收录类别	SCI
WOS记录号	WOS:000503399200039
语种	英语