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Research on the strong optical feedback effects based on spectral analysis method
Author(s): Zhaoli Zeng; XueMin Qu; Weina Li; Min Zhang; Hao Wang; Tuo Li
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Paper Abstract

The strong optical feedback has the advantage of generating high resolution fringes. However, these feedback fringes usually seem like the noise signal when the feedback level is high. This defect severely limits its practical application. In this paper, the generation mechanism of noise fringes with strong optical feedback is studied by using spectral analysis method. The spectral analysis results show that, in most cases, the noise-like fringes are observed owing to the strong multiple high-order feedback. However, at certain feedback cavity condition, there may be only one high-order feedback beam goes back to the laser cavity, the noise-like fringes can change to the cosine-like fringes. And the resolution of this fringe is dozens times than that of the weak optical feedback. This research provides a method to obtain high resolution cosine-like fringes rather than noise signal in the strong optical feedback, which makes it possible to be used in nanoscale displacement measurements.

Paper Details

Date Published: 12 January 2018
PDF: 6 pages
Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 106210P (12 January 2018); doi: 10.1117/12.2285569
Show Author Affiliations
Zhaoli Zeng, Fourth Military Medical Univ. (China)
XueMin Qu, Fourth Military Medical Univ. (China)
Weina Li, Fourth Military Medical Univ. (China)
Min Zhang, Fourth Military Medical Univ. (China)
Hao Wang, Fourth Military Medical Univ. (China)
Tuo Li, Fourth Military Medical Univ. (China)


Published in SPIE Proceedings Vol. 10621:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Hwa-Yaw Tam; Kexin Xu; Hai Xiao; Liquan Dong, Editor(s)

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