半导体激光器稳频方法的对比研究

发布时间：2018-01-04 04:05

本文关键词：半导体激光器稳频方法的对比研究　出处：《中北大学》2015年硕士论文　论文类型：学位论文

【摘要】：激光器自20世纪60年代诞生以来，由于其具备良好的物理性能，应用日益广泛，发展迅速。其中，激光器类的外腔半导体激光器由于具备体积小、效率高、使用寿命长等优点，在光通信、光交换、高精度干涉测量等近乎整个光电子领域都有长远的应用，在这些应用中都要求激光器具有窄线宽和高频率的输出稳定性。论文针对原子干涉仪项目中对激光器稳定度的要求,介绍了几种典型的稳频方法，从是否带调制的角度对比分析稳频方法的优劣。本文选择调制类的稳频方法——饱和吸收稳频法和塞曼（Zeeman）稳频法，非调制的稳频法——DAVLL（Dichroic-Atomic-VaporLaser Lock）和DFDL（Doppler-free Dichroic Lock）稳频法，分别搭建实验平台，对稳频效果进行计算评估，通过计算得到饱和吸收稳频法和DAVLL稳频法的锁频稳定度均为10-9量级，塞曼稳频法和DFDL稳频法的锁频稳定度均为10-10量级，稳频结果能基本满足实验运用的需求，，对以后客观选择适合的稳频方法进行实验有一定的帮助。从实验系统搭建的复杂程度、实现稳频的难易程度以及稳频结果的好坏综合对比了这几种稳频方法的优劣。饱和吸收法直接将调制信号加载到激光器，给激光器引入额外的频率噪声，造成激光频率抖动；外调制的塞曼稳频法以及无调制的DAVLL和DFDL稳频方法不会给激光器带来频率扰动，而且实验系统简单，容易搭建，稳频效果也相对较好。因此，外调制和无调制的稳频方法将逐步成为半导体激光器稳频技术研究的发展方向。
[Abstract]:Since its birth in 1960s, lasers have been widely used and developed rapidly due to their good physical properties. Among them, lasers with external cavity semiconductor lasers have small volume and high efficiency. Long service life and other advantages, in optical communications, optical switching, high-precision interferometry and other nearly the whole field of optoelectronics has a long-term application. In these applications, the laser is required to have narrow linewidth and high frequency output stability. Aiming at the requirement of laser stability in the atomic interferometer project, several typical frequency stabilization methods are introduced in this paper. The advantages and disadvantages of the frequency stabilization methods are compared and analyzed from the point of view of whether or not the modulation is carried out. In this paper, the modulation methods, saturated absorption frequency stabilization method and Zeeman Zeemann frequency stabilization method, are selected. Unmodulated Frequency Stabilization method DAVLLE-Atomic-VaporLaser Lock and DFDL. Doppler-free Dichroic Lockhart method. The experimental platform was set up to calculate and evaluate the frequency stabilization effect. The results show that the frequency locking stability of the saturated absorption method and the DAVLL method is 10-9 magnitude. The frequency locking stability of Zeeman method and DFDL method are 10-10 orders of magnitude, and the results can basically meet the needs of experimental application. It is helpful to choose the suitable frequency stabilization method in the future. According to the complexity of the experimental system, the difficulty of realizing the frequency stabilization and the result of the frequency stabilization, the advantages and disadvantages of these methods are compared. The saturation absorption method loads the modulated signal directly into the laser. The laser frequency jitter is caused by introducing extra frequency noise to the laser. The external modulation Zeeman frequency stabilization method and the non-modulation DAVLL and DFDL frequency stabilization method will not bring the frequency disturbance to the laser, and the experimental system is simple, easy to build, and the frequency stabilization effect is relatively good. The frequency stabilization method of external modulation and no modulation will gradually become the research direction of frequency stabilization technology of semiconductor lasers.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN248.4

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