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12 March 2020 A fast and cost-efficient technique for estimating feedback strength parameter C in laser self-mixing interferometry
Ke Kou, Cuo Wang, Tianhong Lian, Jun Weng
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Proceedings Volume 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 114390Q (2020) https://doi.org/10.1117/12.2543271
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China
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.
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Ke Kou, Cuo Wang, Tianhong Lian, and Jun Weng "A fast and cost-efficient technique for estimating feedback strength parameter C in laser self-mixing interferometry", Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390Q (12 March 2020); https://doi.org/10.1117/12.2543271
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KEYWORDS
Laser interferometry
Nd:YAG lasers
Sensors
Laser applications
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