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Measurement of the feedback coefficient by monitoring the power difference at power jump point in self-mixing vibration signal |
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| Authors: | Chenchen Wang Junfeng Zhou Yunkun Zhao Youze Chen Benli Yu Liang Lu |
| Institution: | 1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Jiulong Road 111#, Hefei, 230601, China;2. Institute of Physical Science and Information Technology, Anhui University, Jiulong Road 111#, Hefei, 230601, China |
| Abstract: | This paper proposed a new method for measuring the feedback coefficient in the self-mixing interference. In experiment, the value of feedback coefficient is obtained by measuring the power difference at power jump point that based on the self-mixing vibration sensing system. It realized the measurement of feedback coefficient in range of 1–7.8 and shows a good agreement with the theoretical derivation and the corresponding simulation. Meanwhile, there is a good fitting result with the determination coefficient of 0.98 and line-width broadening factor of 3.245 respectively, which also realized measurement of feedback coefficient and line-width broadening factor at the same time. |
| Keywords: | Corresponding author Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education Anhui University Jiulong Road 111# Hefei 230601 China Self-mixing effect Optical feedback measurement Laser sensors |
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