| 激光强回馈系统的动态调制稳频技术 |
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| 引用本文： | 曾召利,张书练.激光强回馈系统的动态调制稳频技术[J].红外与激光工程,2015,44(5):1402-1407. |
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| 作者姓名： | 曾召利 张书练 |
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| 作者单位： | 1.第四军医大学生物医学工程系,陕西 西安 710032; |
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| 摘 要： | 激光强回馈系统与弱回馈系统相比,在无任何电子细分条件下就可获得纳米级的分辨率。但是,由于其回馈水平高,容易发生模式转换或偏振跳变,稳频十分困难。提出了一种激光强回馈系统的动态调制稳频方法,研究了动态调制稳频中的零点定位、清零补偿等关键技术及算法。实验结果表明,通过采用动态调制稳频技术,消除了激光强回馈系统中的模式转移及偏振跳变现象,获得了调制均匀、幅值相等的回馈条纹,有效地解决了激光强回馈系统的稳频问题,大大提高了系统的抗干扰能力,对进一步研究高精度强回馈测量系统具有重要意义。
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| 关 键 词： | 稳频技术 激光强回馈 动态调制 |
| 收稿时间： | 2014-09-20 |
Dynamic modulation frequency stabilization technology in laser strong optical feedback system |
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| Zeng Zhaoli,Zhang Shulian.Dynamic modulation frequency stabilization technology in laser strong optical feedback system[J].Infrared and Laser Engineering,2015,44(5):1402-1407. |
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| Authors: | Zeng Zhaoli Zhang Shulian |
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| Affiliation: | 1.Department of Mathematics and Physics,The Fourth Military Medical University,Xi'an 710032,China;2.State Key Laboratory of Precision Measurement Technology and Instruments,Tsinghua University,Beijing 100084,China |
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| Abstract: | Compared with laser weak optical feedback, laser strong optical feedback can obtain nano-scale resolution without any electric subdivision. However, it is hard to stabilize the laser frequency owing to the strong feedback level high, which may insults in mode transformation or polarization flipping. A novel technology of dynamic modulation frequency stabilization method was presented. The key technologies and algorithms of zero point and reset compensation were studied systematically. Experimental results show that the uniform modulation and equal amplitude fringes are obtained. The frequency stabilization problem of strong optical feedback system is resolved successfully by using the dynamic modulation frequency stabilization technology. The result plays an important role in developing high accuracy displacement measurement system with strong optical feedback. |
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| Keywords: | frequency stabilization technology laser strong optical feedback dynamic modulation |
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