中国物理B ›› 2008, Vol. 17 ›› Issue (8): 2979-2983.doi: 10.1088/1674-1056/17/8/036

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Laser self-mixing interference fibre sensor

朱 钧, 赵 燕, 金国藩   

  1. State Key Lab of Precision Measurement Technology {\& Instruments, Tsinghua University, Beijing 100084, China
  • 出版日期:2008-08-20 发布日期:2008-08-20
  • 基金资助:
    Project supported by the foundations of State Key Lab of Precision Measurement Technology {\&} Instruments, Tsinghua University, China.

Laser self-mixing interference fibre sensor

Zhu Jun(朱钧)†, Zhao Yan(赵燕), and Jin Guo-fan(金国藩)   

  1. State Key Lab of Precision Measurement Technology & Instruments, Tsinghua University, Beijing 100084, China
  • Online:2008-08-20 Published:2008-08-20
  • Supported by:
    Project supported by the foundations of State Key Lab of Precision Measurement Technology {\&} Instruments, Tsinghua University, China.

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摘要： Fibre sensors exhibit a number of advantages over other sensors such as high sensitivity, electric insulation, corrosion resistance, interference rejection and so on. And laser self-mixing interference can accurately detect the phase difference of feedback light. In this paper, a novel laser self-mixing interference fibre sensor that combines the advantages of fibre sensors with those of laser self-mixing interference is presented. Experimental configurations are set up to study the relationship between laser power output and phase of laser feedback light when the fibre trembles or when the fibre is stretched or pressed. The theoretical analysis of pressure sensors based on laser self-mixing interference is indicated to accord with the experimental results.

关键词: laser self-mixing interference, fibre sensor

Abstract: Fibre sensors exhibit a number of advantages over other sensors such as high sensitivity, electric insulation, corrosion resistance, interference rejection and so on. And laser self-mixing interference can accurately detect the phase difference of feedback light. In this paper, a novel laser self-mixing interference fibre sensor that combines the advantages of fibre sensors with those of laser self-mixing interference is presented. Experimental configurations are set up to study the relationship between laser power output and phase of laser feedback light when the fibre trembles or when the fibre is stretched or pressed. The theoretical analysis of pressure sensors based on laser self-mixing interference is indicated to accord with the experimental results.

Key words: laser self-mixing interference, fibre sensor

中图分类号:  (Sensors, gyros)

  • 42.81.Pa
42.55.Wd (Fiber lasers)