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Chinese Physics, 2006, Vol. 15(12): 2934-2941    DOI: 10.1088/1009-1963/15/12/028
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

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)
The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University, Beijing 100084, China
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.
Keywords:  mode hopping      optical feedback      modes competition      intensity modulation  
Received:  24 April 2006      Revised:  24 July 2006      Accepted manuscript online: 
PACS:  42.55.Rz (Doped-insulator lasers and other solid state lasers)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
  42.60.Fc (Modulation, tuning, and mode locking)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60438010).

Cite this article: 

Tan Yi-Dong(谈宜东), Zhang Shu-Lian(张书练), Wan Xin-Jun(万新军), and Cheng Xiang(程翔) Mode hopping in single-mode microchip Nd:YAG lasers induced by optical feedback 2006 Chinese Physics 15 2934

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