Dual-Polarization Differential Noise Reduction Technology in Dual-Beam Feedback Self-Mixing Interferometer

Guanping Song; Pan Qi; Ying Li; Jingang Zhong

doi:10.3788/LOP202259.1126001

Laser & Optoelectronics Progress, Volume. 59, Issue 11, 1126001(2022)

Dual-Polarization Differential Noise Reduction Technology in Dual-Beam Feedback Self-Mixing Interferometer

Guanping Song¹, Pan Qi², Ying Li³, and Jingang Zhong^1、*

¹Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou 510650, Guangdong , China

²School of Information, Guangdong Communication Polytechnic, Guangzhou 510650, Guangdong , China

³College of Chinese Language and Culture, Jinan University, Guangzhou 510650, Guangdong , China

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Fig. 1. Schematic diagram of dual-beam feedback self-mixing interference system model

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Fig. 2. Relationship curve between amplitude of self-mixing interference signal and external cavity length $L_{e x t 1}$

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Fig. 3. Simulation diagram of self-mixing interference signal with single-beam feedback and dual-beam feedback

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Fig. 4. Schematic diagram of dual-beam feedback self-mixing interference experimental system using randomly polarized He-Ne laser

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Fig. 5. Relationship curve between amplitude of self-mixing interference signal and external cavity length $L_{e x t 1}$

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Fig. 6. Comparison of self-mixing interference signals with single-beam feedback and double-beam feedback. (a) Single-beam feedback; (b) dual-beam feedback when $L_{e x t 1} = 50.50 μ m$ ; (c) dual-beam feedback when $L_{e x t 1} = 50.55 μ m$ ; (d) dual-beam feedback when $L_{e x t 1} = 50.60 μ m$

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Fig. 7. Spectra of self-mixing interference signals with single-beam feedback and double-beam feedback. (a) Single-beam feedback; (b) dual-beam feedback when $L_{e x t 1} = 50.50 μ m$ ; (c) dual-beam feedback when $L_{e x t 1} = 50.55 μ m$ ; (d) dual-beam feedback when $L_{e x t 1} = 50.60 μ m$

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Fig. 8. Schematic diagram of dual-beam feedback self-mixing interference experimental system for dual-polarization differential detection

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Fig. 9. Self-mixing interference signal for dual-polarization differential detection. (a) Self-mixing interference signal with single-beam feedback; (b) Dual-beam feedback self-mixing interference signal when $L_{e x t 1} = 50.45 μ m$

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Fig. 10. Spectra of self-mixing interference signal for dual-polarization differential detection. (a) Spectrum of S-polarized light interference signal with single-beam feedback; (b) spectrum of P-polarized light interference signal with single-beam feedback; (c) spectrum of dual-polarization differential signal with single-beam feedback; (d) spectrum of S-polarized light interference signal with dual-beam feedback; (e) spectrum of P-polarized light interference signal with dual-beam feedback; (f) spectrum of dual-polarization differential signal with dual-beam feedback

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Fig. 11. Variation curves of external cavity length caused by flat crystal rotation

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Guanping Song, Pan Qi, Ying Li, Jingang Zhong. Dual-Polarization Differential Noise Reduction Technology in Dual-Beam Feedback Self-Mixing Interferometer[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1126001

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Paper Information

Category: Physical Optics

Received: May. 28, 2021

Accepted: Jul. 19, 2021

Published Online: Jun. 9, 2022

The Author Email: Zhong Jingang (tzjg@jnu.edu.cn)

DOI:10.3788/LOP202259.1126001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology