| Intensity modulation in single-mode microchip Nd：YAG lasers with asymmetric external cavity |
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| 引用本文： | 谈宜东,张书练,刘维新,毛威.Intensity modulation in single-mode microchip Nd：YAG lasers with asymmetric external cavity[J].中国物理 B,2007,16(4):1020-1026. |
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| 作者姓名： | 谈宜东 张书练 刘维新 毛威 |
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| 作者单位： | State Key Laboratory of Precision Measurement Technology and Instruments,
Department of Precision Instruments, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Project supported by the
National Natural Science Foundation of China (Grant No~60438010). |
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| 摘 要： | Intensity modulation induced by the asymmetric external cavity in
single-mode microchip Nd:YAG lasers is presented. Two kinds of experimental
results are discussed based on multiple feedback effects. In one case, the
intensity modulation curve is a normal sine wave, whose fringe frequency is
four times higher than that of a conventional optical feedback system,
caused by multiple feedback effects. In the other case, the intensity modulation
curve is the overlapping of the above quadruple-frequency signal and
conventional optical feedback signal, which is determined by the additional
phase difference induced by the asymmetric external cavity. The theoretical
analyses are in good agreement with the experimental results. The
quadruple-frequency modulation of the laser output intensity can greatly
increase the resolution of displacement measurement of an optical feedback
system.
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| 关 键 词： | 单模微芯片Nd：YAG激光器 不对称外腔场 光强调制 光学反馈 |
| 收稿时间： | 2006-06-29 |
| 修稿时间： | 2006-06-292006-11-06 |
Intensity modulation in single-mode microchip Nd:YAG lasers with asymmetric external cavity |
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| Tan Yi-Dong,Zhang Shu-Lian,Liu Wei-Xin and Mao Wei.Intensity modulation in single-mode microchip Nd:YAG lasers with asymmetric external cavity[J].Chinese Physics B,2007,16(4):1020-1026. |
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| Authors: | Tan Yi-Dong Zhang Shu-Lian Liu Wei-Xin and Mao Wei |
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| Affiliation: | State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China |
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| Abstract: | Intensity modulation induced by the asymmetric external cavity in
single-mode microchip Nd:YAG lasers is presented. Two kinds of experimental
results are discussed based on multiple feedback effects. In one case, the
intensity modulation curve is a normal sine wave, whose fringe frequency is
four times higher than that of a conventional optical feedback system,
caused by multiple feedback effects. In the other case, the intensity modulation
curve is the overlapping of the above quadruple-frequency signal and
conventional optical feedback signal, which is determined by the additional
phase difference induced by the asymmetric external cavity. The theoretical
analyses are in good agreement with the experimental results. The
quadruple-frequency modulation of the laser output intensity can greatly
increase the resolution of displacement measurement of an optical feedback
system. |
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| Keywords: | optical feedback asymmetric external cavity multiple
feedbacks |
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