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Proceedings Paper

Novel F-P dual interferometer for measuring small displacement
Author(s): Zhaoxia Wu; Zhiquan Li; Kai Tong; Xifu Qiang
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Paper 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.

Paper Details

Date Published: 5 October 2000
PDF: 5 pages
Proc. SPIE 4223, Instruments for Optics and Optoelectronic Inspection and Control, (5 October 2000); doi: 10.1117/12.401760
Show Author Affiliations
Zhaoxia Wu, Yanshan Univ. (China)
Zhiquan Li, Harbin Institute of Technology (China)
Kai Tong, Yanshan Univ. (China)
Xifu Qiang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 4223:
Instruments for Optics and Optoelectronic Inspection and Control
Guang Hui Wei; Sheng Liu, Editor(s)

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