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Proceedings Paper

Suppression of stray interference peaks of optical joint in white light interferometer
Author(s): Yongqing Cheng; Jun Yang; Yonggui Yuan; Haoliang Zhang; Zhe Yang; Yan Lv; Libo Yuan
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Paper Abstract

The stray interference peaks (SIPs) are an important factor resulting in the misjudgment of measurement information in white light interferometer (WLI). SIPs are generated by the residual reflected light beams. We theoretically analyze the interference conditions of the SIP. The analysis shows that these SIPs are discrete main interference peak outside and have different orders. We present a stagger optical path (SOP) method for suppressing or eliminating these SIP which will appear in the interference pattern. The SOP means that there is an appropriate fiber length determined by the delay amount of delay line between each joint. Moreover, an experiment with two joints, for simplicity, is given as an example. Experimental results show that the high-order SIP from the joints can be suppressed by the SOP to obtain a clean interference pattern.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032385 (23 April 2017); doi: 10.1117/12.2265480
Show Author Affiliations
Yongqing Cheng, Harbin Engineering Univ. (China)
Jun Yang, Harbin Engineering Univ. (China)
Yonggui Yuan, Harbin Engineering Univ. (China)
Haoliang Zhang, Harbin Engineering Univ. (China)
Zhe Yang, Harbin Engineering Univ. (China)
Yan Lv, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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