【摘要】 回音壁模式(whispering gallery mode, WGM)微腔具有超高Q值和极小的模式体积，并且还存在一种弱后向瑞利散射。利用WGM微腔的该反馈机制，可以实现激光线宽几个数量级的压缩，基于此设计了一种窄线宽激光器。利用数值仿真分析了自注入锁定过程中的光学行为，具体而言分析了系统中相位、失谐、后向散射、耦合效率的变化对系统性能的影响。同时并使用半导体激光器进行了验证实验，半导体激光器中心波长为1552.126 nm,实验中将7 MHz线宽激光输出压窄至500 kHz。基于该方案实现的窄线宽激光器具有轻量化、便捷性高、性能稳定等诸多优点。因而，这种窄线宽激光器在激光干涉测量、激光陀螺、激光测距等领域具有潜在的应用价值。更多还原

【Abstract】 Whispering Gallery Mode(WGM)microcavities exhibit ultrahigh Q factors and extremely small mode volumes, along with weak backward Rayleigh scattering.By utilizing this feedback mechanism in WGM microcavities, a laser linewidth compression by several orders of magnitude can be achieved, based on which a narrow linewidth laser is designed.Numerical simulations were used to analyze the optical behavior during the self-injection locking process, specifically the effects of changes in phase, detuning, backscattering and coupling efficiency on the system performance.Additionally, experimental validation is performed using a semiconductor laser with a central wavelength of 1552.126nm, and the 7 MHz linewidth laser output was narrowed to 500 kHz in the experiments.The narrow linewidth laser achieved through this approach has many advantages such as lightweight, high convenience, and stable performance.As a result, this narrow linewidth laser holds potential applications in areas such as laser interferometry, laser gyroscopes, laser ranging, and other related fields.更多还原