Novel F-P dual interferometer for measuring small displacement

Zhaoxia Wu; Zhiquan Li; Kai Tong; Xifu Qiang

doi:10.1117/12.401760

5 October 2000 Novel F-P dual interferometer for measuring small displacement

Zhaoxia Wu, Zhiquan Li, Kai Tong, Xifu Qiang

Proceedings Volume 4223, Instruments for Optics and Optoelectronic Inspection and Control; (2000) https://doi.org/10.1117/12.401760
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

An optical fiber dual-interferometer for measuring small displacement has been developed in this paper. A wavelength- scanning source is used to simultaneously illuminate two Fabry-Perot cavities. One is as the sensing cavity, the other is as the reference cavity. If the length of the reference cavity is pre-calibrated and maintain constant, and the scanning wavelength is taken as an inter-converter to compare the gap length of the sensing cavity with the reference cavity length, using the frequency spectrum separator, absolute measurement can be obtained.

Citation Download Citation

Zhaoxia Wu, Zhiquan Li, Kai Tong, and Xifu Qiang "Novel F-P dual interferometer for measuring small displacement", Proc. SPIE 4223, Instruments for Optics and Optoelectronic Inspection and Control, (5 October 2000); https://doi.org/10.1117/12.401760

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