Chin. Phys. Lett.  2006, Vol. 23 Issue (5): 1188-1191    DOI:
Original Articles |
Optical Feedback Characteristics in He--Ne Dual Frequency Lasers
MAO Wei;ZHANG Shu-Lian;ZHANG Lian-Qing;ZHU Jun;LI Yan
The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084
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MAO Wei, ZHANG Shu-Lian, ZHANG Lian-Qing et al  2006 Chin. Phys. Lett. 23 1188-1191
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Abstract Optical feedback characteristics in He--Ne dual frequency lasers are studied systematically in different feedback power ratios with a variable attenuator. Feedback power ratios vary from 0.010 up to 0.998. Five distinct regimes of self-interference effects are found and defined as regimes I, II, III, IV and V. Accordingly, five optical feedback levels have been put forward in He--Ne dual frequency lasers. Strong mode competitions are observed in regimes III and IV. In regime V, multiple feedback effects are investigated. The basic theoretical analysis is also presented. Our results can advance the research of self-mixing interferometer and displacement sensor of He--Ne orthogonally polarized dual frequency lasers.
Keywords: 42.55.Lt      42.60.Jf      42.25.Lc     
Published: 01 May 2006
PACS:  42.55.Lt (Gas lasers including excimer and metal-vapor lasers)  
  42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)  
  42.25.Lc (Birefringence)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I5/01188
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