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Self-Mixing Interference in Dual-Polarization Microchip Nd:YAG Lasers |
| WAN Xin-Jun;ZHANG Shu-Lian;LIU Gang;FEI Li-Gang |
| State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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WAN Xin-Jun, ZHANG Shu-Lian, LIU Gang et al 2004 Chin. Phys. Lett. 21 2175-2178 |
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Abstract The self-mixing interference in dual-polarization microchip Nd:YAG lasers is demonstrated. Under optical feedback, the orthogonal polarization components of the laser would undergo antiphase intensity modulations; at high feedback level, the polarization switching appears. We also observe that the laser self-mixing sensitivity changes periodically with the frequency difference of orthogonal polarizations. An initial theoretical model is put out and agrees well with the experiments. The results are useful for self-mixing sensitivity enhancement and offer a new way of absolute distance measurement.
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| Keywords:
42.55.Sa
42.25.Ja
42.79.Qx
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Published: 01 November 2004
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| PACS: |
42.55.Sa
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(Microcavity and microdisk lasers)
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42.25.Ja
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(Polarization)
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42.79.Qx
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(Range finders, remote sensing devices; laser Doppler velocimeters, SAR, And LIDAR)
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