中国物理B ›› 2018, Vol. 27 ›› Issue (2): 24201-024201.doi: 10.1088/1674-1056/27/2/024201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Sub-external cavity effect and elimination method in laser self-mixing interference wave plate measurement system

Haisha Niu(牛海莎), Yanxiong Niu(牛燕雄), Jianjun Song(宋建军)   

  1. 1. School of Instrument Science and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
    2. School of Mechanical Engineering, Nantong University, Nantong 226019, China
  • 收稿日期:2017-09-06 修回日期:2017-10-10 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: Yanxiong Niu E-mail:niuyx@buaa.edu.cn

Sub-external cavity effect and elimination method in laser self-mixing interference wave plate measurement system

Haisha Niu(牛海莎)1, Yanxiong Niu(牛燕雄)1, Jianjun Song(宋建军)2   

  1. 1. School of Instrument Science and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
    2. School of Mechanical Engineering, Nantong University, Nantong 226019, China
  • Received:2017-09-06 Revised:2017-10-10 Online:2018-02-05 Published:2018-02-05
  • Contact: Yanxiong Niu E-mail:niuyx@buaa.edu.cn
  • About author:42.25.Hz; 42.30.Lr; 42.25.Lc; 06.30.Ka

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摘要： Laser self-mixing interference (SMI) wave plate measurement method is a burgeoning technique for its simplicity and efficiency. But for the non-coated sample, the reflected light from the surface can seriously affect the measurement results. To analyze the reason theoretically, a self-consistent model for laser operation with a sub-external and an external cavity is established, and the sub-external cavity formed by the sample and a cavity mirror is proved to be the main error source. A synchronous tuning method is proposed to eliminate the sub-external cavity effect. Experiments are carried out on the synchronously tuning double external cavities self-mixing interference system, and the error of the system is in the range of -0.435°~0.387° compared with the ellipsometer. The research plays an important role in improving the performance and enlarging the application range of the laser self-mixing interference system.

关键词: self-mixing interference, non-coated wave plate measurement, self-consistent model

Abstract: Laser self-mixing interference (SMI) wave plate measurement method is a burgeoning technique for its simplicity and efficiency. But for the non-coated sample, the reflected light from the surface can seriously affect the measurement results. To analyze the reason theoretically, a self-consistent model for laser operation with a sub-external and an external cavity is established, and the sub-external cavity formed by the sample and a cavity mirror is proved to be the main error source. A synchronous tuning method is proposed to eliminate the sub-external cavity effect. Experiments are carried out on the synchronously tuning double external cavities self-mixing interference system, and the error of the system is in the range of -0.435°~0.387° compared with the ellipsometer. The research plays an important role in improving the performance and enlarging the application range of the laser self-mixing interference system.

Key words: self-mixing interference, non-coated wave plate measurement, self-consistent model

中图分类号:  (Interference)

  • 42.25.Hz
42.30.Lr (Modulation and optical transfer functions) 42.25.Lc (Birefringence) 06.30.Ka (Basic electromagnetic quantities)