| 光学锁相环的研究进展 |
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| 引用本文： | 张超超,王建波,殷聪,张宝武,刘若男,席路,李孟瑶. 光学锁相环的研究进展[J]. 红外与激光工程, 2022, 51(4): 20210156-1-20210156-11. DOI: 10.3788/IRLA20210156 |
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| 作者姓名： | 张超超 王建波 殷聪 张宝武 刘若男 席路 李孟瑶 |
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| 作者单位： | 1.中国计量大学 计量测试工程学院，浙江 杭州 310018 |
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| 基金项目： | 国家重点研发计划（2016YFF0200302）；国家自然科学基金（62075165） |
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| 摘 要： | 光学锁相环（OPLL）根据其锁定的两束激光间是否存在频差可分为零差光学锁相环和外差光学锁相环。主要介绍了外差光学锁相环的研究进展，它是一种通过鉴频鉴相方式使激光间的频率差保持相对稳定的偏频锁定方法。相较于其他激光偏频锁定方法，光学锁相环具有结构简单、伺服频率带宽大、频率偏置范围宽、锁定准确度高等优势，在原子相干、冷原子系统、相干功率合成以及外差干涉测量等领域都得到了越来越广泛的应用。首先介绍了激光偏频锁定的主要方法及光学锁相环的特点；其次介绍了光学锁相环的基本模型，分析了光学锁相环的误差反馈过程，并按照光学锁相环实现方法的不同详细介绍了其采用的关键技术和研究进展，对近年来光学锁相环在不同领域的应用进展做了简要介绍；最后对该方法的发展路线进行了总结和展望。
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| 关 键 词： | 光学锁相环 偏频锁定 光相位锁定 激光稳频 |
| 收稿时间： | 2021-03-10 |
Research progress of optical phase-locked loop |
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| Affiliation: | 1.College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China2.National Institute of Metrology, China, Beijing 100013, China3.School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | According to whether there is frequency difference between two laser beams locked by an optical phase-locked loop (OPLL), it can be divided into homodyne optical phase-locked loop and heterodyne optical phase-locked loop. The progress of heterodyne optical phase-locked loop was mainly introduced, which could keep the frequency difference between lasers relatively stable through frequency discrimination and phase discrimination. Compared with other laser offset locking methods, optical phase-locked loop has the advantages of simple structure, large servo bandwidth, wide offset range and high locking accuracy. It plays a very important role in atomic coherence, cold atom system, coherent beam combining, heterodyne interferometry and other fields, and has received more and more extensive attention. The main method of laser offset locking and the characteristics of optical phase-locked loop were introduced firstly, then the basic model of optical phase-locked loop was introduced, and the basic error model of optical phase-locked loop was analyzed. According to the different realization methods of OPLL, the key technologies and research progress of OPLL were introduced in detail. Then the application progress of OPLL in different fields in recent years was introduced. Finally, the development of this method was summarized and prospected. |
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