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Proceedings Paper

Self-mixing sensitivity dependence of dual-polarization microchip Nd:YAG lasers on the frequency difference of orthogonal polarizations
Author(s): Xinjun Wan; Shulian Zhang
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Paper 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.

Paper Details

Date Published: 14 February 2005
PDF: 8 pages
Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.576600
Show Author Affiliations
Xinjun Wan, Tsinghua Univ. (China)
Shulian Zhang, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 5634:
Advanced Sensor Systems and Applications II
Yun-Jiang Rao; Osuk Y. Kwon; Gang-Ding Peng, Editor(s)

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