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Proceedings Paper

A fast and cost-efficient technique for estimating feedback strength parameter C in laser self-mixing interferometry
Author(s): Ke Kou; Cuo Wang; Tianhong Lian; Jun Weng
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Paper Abstract

The parameter C, named optical feedback strength coefficient, has always exhibited significance in the field of laser self-mixing interferometry (SMI), and it can be utilized to assess the feedback regime or reconstruct an external target's motion. Plenty of researchers have concerned about the technique of acquiring C from SMI signals. Instead of empirical conclusions and according to clear mathematical deduction, this manuscript proposes a fast and cost-efficient method to evaluate C, eliminating large calculation consumption as in the reported optimization methods. Regardless of laser types and the line-width enhancement factor α, it is possible to achieve a relative precision within 5% for C ranging from 0.1 to 5, which is helpful for SMI theoretical studies and SMI sensors.

Paper Details

Date Published: 12 March 2020
PDF: 9 pages
Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390Q (12 March 2020); doi: 10.1117/12.2543271
Show Author Affiliations
Ke Kou, Xi'an Univ. of Technology (China)
Cuo Wang, Xi'an Univ. of Technology (China)
Tianhong Lian, Xi'an Univ. of Technology (China)
Jun Weng, Xi'an Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11439:
2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Kexin Xu; Hai Xiao; Sen Han, Editor(s)

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