【摘 要】
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Optical feedback characteristics in He-Ne dual frequency lasers are studied systematically in different feedback power ratios with a variable attenuator. Feedba
【机 构】
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The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precisio
论文部分内容阅读
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 reults can advance the research ofself-mixing interferometer and displacement sensor of He-Ne orthogonally polarized dual frequency lasers.
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