中国物理B ›› 2006, Vol. 15 ›› Issue (12): 2934-2941.doi: 10.1088/1009-1963/15/12/028

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Mode hopping in single-mode microchip Nd:YAG lasers induced by optical feedback

谈宜东, 张书练, 万新军, 程 翔   

  1. The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University, Beijing 100084, China
  • 收稿日期:2006-04-24 修回日期:2006-07-24 出版日期:2006-12-20 发布日期:2006-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60438010).

Mode hopping in single-mode microchip Nd:YAG lasers induced by optical feedback

Tan Yi-Dong(谈宜东)†, Zhang Shu-Lian(张书练), Wan Xin-Jun(万新军), and Cheng Xiang(程翔)   

  1. The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University, Beijing 100084, China
  • Received:2006-04-24 Revised:2006-07-24 Online:2006-12-20 Published:2006-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60438010).

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摘要： The mode hopping phenomenon induced by optical feedback in single-mode microchip Nd:YAG lasers is presented. With optical feedback, mode hopping strongly depends on two factors: the ratio of external cavity length to intra-cavity length, and initial gains of the two hopping modes. When external cavity length equals an integral multiple of intra-cavity length, there is almost no mode hopping. However, if the external cavity length does not equal an integral multiple of intra-cavity length, mode hopping occurs. The ratio of external cavity length to intra-cavity length determines the position of two-mode hopping. The initial gains of the two hopping modes determine the corresponding peak values and oscillating periods of them in the intensity modulation curves.

Abstract: The mode hopping phenomenon induced by optical feedback in single-mode microchip Nd:YAG lasers is presented. With optical feedback, mode hopping strongly depends on two factors: the ratio of external cavity length to intra-cavity length, and initial gains of the two hopping modes. When external cavity length equals an integral multiple of intra-cavity length, there is almost no mode hopping. However, if the external cavity length does not equal an integral multiple of intra-cavity length, mode hopping occurs. The ratio of external cavity length to intra-cavity length determines the position of two-mode hopping. The initial gains of the two hopping modes determine the corresponding peak values and oscillating periods of them in the intensity modulation curves.

Key words: mode hopping, optical feedback, modes competition, intensity modulation

中图分类号:  (Doped-insulator lasers and other solid state lasers)

  • 42.55.Rz
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 42.60.Fc (Modulation, tuning, and mode locking)