Self-mixing sensitivity dependence of dual-polarization microchip Nd:YAG lasers on the frequency difference of orthogonal polarizations

Xinjun Wan; Shulian Zhang

doi:10.1117/12.576600

14 February 2005 Self-mixing sensitivity dependence of dual-polarization microchip Nd:YAG lasers on the frequency difference of orthogonal polarizations

Xinjun Wan, Shulian Zhang

Author Affiliations +

Proceedings Volume 5634, Advanced Sensor Systems and Applications II; (2005) https://doi.org/10.1117/12.576600
Event: Photonics Asia, 2004, Beijing, China

Abstract

In this paper, we demonstrate the evolution of the self-mixing phenomena of dual-polarization microchip Nd:YAG lasers as we change the feedback strength and the frequency difference. At high feedback level the microchip laser's polarization flips orthogonally as the external mirror moves. Especially, we observed that the intensity modulation amplitude varies periodically with the frequency difference of orthogonal polarizations, and that with different types of targets the periodic change always exists. A qualitative model is put forward and is in good agreement with the experimental results. The results can be applied to the self-mixing sensitivity enhancement, and also presents a novel method of absolute distance measurement.

Citation Download Citation

Xinjun Wan and Shulian Zhang "Self-mixing sensitivity dependence of dual-polarization microchip Nd:YAG lasers on the frequency difference of orthogonal polarizations", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); https://doi.org/10.1117/12.576600

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