全光纤M-Z干涉仪激光器鉴频系统

贾豫东; 欧 攀; 张春熹; 王纪强

全光纤M-Z干涉仪激光器鉴频系统

北京航空航天大学仪器科学与光电工程学院, 北京 100191

详细信息

作者简介:
贾豫东(1975-),男,甘肃庆阳人,博士生,jyd_blueeye@126.com.

中图分类号: TN 248
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出版历程
- 收稿日期: 2008-11-03
- 网络出版日期: 2009-12-31

Laser frequency discriminator using all fiber unbalanced-arm Mach-Zehnder interferometer technique

School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 研究了不等臂M-Z干涉仪鉴频的基本原理,对采用三角波调制改变干涉仪臂长获得鉴频信号的过程进行了定量分析.在此基础上,仿真计算了线性改变干涉仪臂长和频率漂移对鉴频信号输出的影响,采用LiNbO₃相位调制器取代PZT(Piezo-Electric Transducer)调制方式,设计实现了鉴频实验装置,获得的实验结果与理论和仿真结果吻合.对驱动信号和环境扰动对该方案的影响进行了实验验证和理论分析,与 PZT调制方式相比,无需高精度温控装置,系统工作稳定可靠,信号调制动态范围可以从PZT调制方式下的几十Hz扩大到GHz.同时可以在该方案中采用lock-in确定相位-频率响应度,从而测定激光器的频率波动范围.
- 激光器 /
- 不等臂M-Z干涉仪 /
- 鉴频 /
- 相位调制器
Abstract: An improved laser frequency discriminator using all fiber unbalanced-arm Mach-Zehnder interferometer technique was studied in detail. The acquisition technique of frequency error signal through utilizing triangular wave to modulate the an arm of interferometer was analyzed quantitatively. The piezo-electric transducer (PZT)-type frequency modulator was replaced with LiNbO₃phase modulator. The interferometer output signal was calculated through emulator. An experimental setup to validate the theoretical analysis was constructed. The result was agreement with simulation result. The modulation signal and environment perturbations were evaluated through experiment. The result shows the system stability is improved greatly, and the modulation dynamic range is extended from Hz to GHz. The phase to frequency responsibility was measured by applying lock-in amplifier, and the peak to peak frequency fluctuation of measured laser can be calculated according to the phase to frequency responsibility.
- laser /
- unbalanced-arm Mach-Zehnder interferometer /
- frequency discriminator /
- phase modulator

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参考文献(1)

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