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题名	单频激光相频特性测量与传输控制技术研究
作者	徐丹
学位类别	博士
答辩日期	2016
授予单位	中国科学院上海光学精密机械研究所
导师	瞿荣辉
关键词	单频激光器 相频特性 迈克尔逊干涉仪 光频传递
其他题名	Studies on Measurement and Transmission of Laser Phase and Frequency Characteristics
中文摘要	窄线宽单频激光器在相干光频传递、相干光通信、高精度光纤传感、相干激光雷达等领域有着十分重要的地位。相位噪声、频率噪声、线宽等参数是评价单频激光器性能的重要指标，如何测量以及如何传递是一项非常重要的工作。基于此背景，开展了基于3×3耦合器的非平衡迈克尔逊干涉仪测量单频激光相频特性的研究，以及单频激光相频特性传输控制技术的研究。 首先，梳理总结了单频激光相频特性表征的理论基础，详细介绍了差分/瞬时相位波动PSD、差分/瞬时频率波动PSD、单边带相位噪声等各个物理量的联系与区别，并且分析了测量时间对线宽的影响。其次，提出了一种基于3×3耦合器的新型延时自外差技术，并利用该技术搭建了相应的单频激光相频特性测量系统。然后对该测量系统用于相位解调的正确性和稳健性进行了实验验证，并在多个方面进行了实际应用。一是对几种商用单频激光器的相频特性进行了测试与分析，仔细研究了它们的噪声分布特征；二是对大范围、高速率的线性扫频激光光源的瞬时相频特性进行了测量，并从不同的时间尺度（对应不同的频率分辨率）和不同的采样率（对应不同的频谱分析范围）两方面来分析了瞬时线宽；三是研究了单频DFB半导体激光器在不同参数下的相频特性，测试结果可以用于对激光器进行状态监测和优化设计。 最后研究了单频激光在光纤中传输时其相频特征的演化特性，通过测量不同长度光纤链路处参考光源的相位和频率噪声功率谱密度，直观地展示出单频激光在经过光纤传递后的噪声累积情况。在此基础上提出了一种基于注入锁定技术的单频激光相频特性传输控制方案，实验搭建了一套110km的传输系统，实验结果表明注入锁定的方式可以对光纤链路引入的噪声进行有效抑制，可以实现单频激光在光纤中的低噪声传输，结果也说明注入锁定的方式可以为后续光频传递技术的研究提供有效的相频特性控制手段，在超长距离光频传递级联链路中也具有重要应用价值。
英文摘要	Single frequency narrow-linewidth lasers are fundamental to a vast array of applications in fields including optical frequency transfer, metrology, coherent optical communications, high resolution sensing, LIDAR. In these applications, the phase and frequency noise is one of the key factors to affect the system performance. The characterization and measurement of the phase and frequency noise are very important for the applications, and thus have been one of the most attractive subjects of researches in laser and photonics field. Characterization theory of the single-frequency laser phase and frequency noise is described. The relations and differences of the power spectral density (PSD) of differential phase and frequency fluctuation, PSD of instantaneous phase and frequency fluctuation, phase noise and linewidth are derived strictly and discussed carefully. An unbalanced Michelson interferometer composed of a 3 × 3 optical fiber coupler is proposed to obtain the noise features of a narrow linewidth laser conveniently without any specific assumptions or noise models. The correction and robustness of the phase demodulation of the proposed setup is verified firstly. The technique is used to characterize the noise features of many commercial lasers and home-made fiber and semiconductor lasers. Moreover, it is also used to characterize the instantaneous linewidth of the swept-frequency broadband laser source. The time-resolved instantaneous linewidth are analyzed from the aspects of different time scale and different sampling rates. The technique can monitor the state change of lasers in different processes of designing, installation, debugging, routine test and final check test, and it offers suggestions to optimize design and improve its performance. The phase and frequency characteristics evolution of single frequency laser is studied when it transfers in fiber link. The phase and frequency noise PSD of optical frequency along the fiber with different length are analyzed. A phase and frequency characteristics transmission control method based on optical injection-locked technique is proposed and a 110km fiber link transfer system is established. The results show that the noise cancellation by using of an optical injection lock loop is realized and it offers a usefull phase and frequency control method for the followed optical frequency transfer research. It will play a great role in the long-haul cascaded fiber link for phase coherent dissemination of optical frequency.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/15969]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	徐丹. 单频激光相频特性测量与传输控制技术研究[D]. 中国科学院上海光学精密机械研究所. 2016.

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