中国物理B ›› 2006, Vol. 15 ›› Issue (9): 2036-2041.doi: 10.1088/1009-1963/15/9/024

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Intensity tuning characteristics of double-mode He--Ne laser with optical feedback

毛威, 张书练, 费立刚   

  1. The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University,Beijing 100084, China
  • 收稿日期:2005-10-17 修回日期:2006-02-14 出版日期:2006-09-20 发布日期:2006-09-20
  • 基金资助:
    Project supported by the Major Program of the National Natural Science Foundation of China (Grant No 60438010).

Intensity tuning characteristics of double-mode He--Ne laser with optical feedback

Mao Wei(毛威)†, Zhang Shu-Lian(张书练), and Fei Li-Gang(费立刚)   

  1. The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University,Beijing 100084, China
  • Received:2005-10-17 Revised:2006-02-14 Online:2006-09-20 Published:2006-09-20
  • Supported by:
    Project supported by the Major Program of the National Natural Science Foundation of China (Grant No 60438010).

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摘要： This paper investigates the intensity tuning characteristics of a double longitudinal modes He--Ne laser subjected to optical feedback. The intensity undulations of the total light and the two modes are observed for different external cavity length. Two modulations of the internal cavity length are performed. One is only for the internal cavity length being modulated and the other is for both the internal and the external cavity length being modulated. The undulation frequency of the total light is found to be determined by the ratio of external cavity length to internal cavity length in both modulations. When the external cavity length is integral times of the internal cavity length, the fringe frequency of the total light could be seven or even more times of that in conventional optical feedback. A simple theoretical analysis is presented, which is in good agreement with the experimental results. The potential use of the experimental results is also discussed.

Abstract: This paper investigates the intensity tuning characteristics of a double longitudinal modes He--Ne laser subjected to optical feedback. The intensity undulations of the total light and the two modes are observed for different external cavity length. Two modulations of the internal cavity length are performed. One is only for the internal cavity length being modulated and the other is for both the internal and the external cavity length being modulated. The undulation frequency of the total light is found to be determined by the ratio of external cavity length to internal cavity length in both modulations. When the external cavity length is integral times of the internal cavity length, the fringe frequency of the total light could be seven or even more times of that in conventional optical feedback. A simple theoretical analysis is presented, which is in good agreement with the experimental results. The potential use of the experimental results is also discussed.

Key words: tuning characteristics, optical feedback, double longitudinal modes

中图分类号:  (Self-focussing, channeling, and filamentation in plasmas)

  • 52.38.Hb
52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?) 52.38.Dx (Laser light absorption in plasmas (collisional, parametric, etc.)) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 02.60.Lj (Ordinary and partial differential equations; boundary value problems)