Stimulated Brillouin scattering provides optical gain for efficient and narrow-linewidth lasers in high-Q microresonator systems. However, the thermal dependence of the Brillouin process as well as the microresonator frequencies impose strict temperature control requirements for long term frequency-stable operation. Here, we study Brillouin backaction and use it to both measure and phase-sensitively lock modal temperature to a reference temperature defined by the Brillouin phase matching condition. At a specific lasing wavelength, the reference temperature can be precisely set by adjusting the resonator’s free spectral range. This backaction control method is demonstrated in a chip-based Brillouin laser, but can be applied in all Brillouin laser platforms. It offers a new approach for frequency-stable operation of Brillouin lasers in atomic clock, frequency metrology, and gyroscope applications.

中文翻译：

---

用于模态温度控制的布里渊反作用温度计

受激布里渊散射为高 Q 微谐振器系统中的高效窄线宽激光器提供光学增益。然而，布里渊过程的热依赖性以及微谐振器频率对长期频率稳定运行提出了严格的温度控制要求。在这里，我们研究了布里渊反作用，并使用它来测量模态温度并将其相位敏感地锁定到由布里渊相位匹配条件定义的参考温度。在特定的激光波长下，可以通过调整谐振器的自由光谱范围来精确设置参考温度。这种反作用控制方法在基于芯片的布里渊激光器中得到演示，但可以应用于所有布里渊激光器平台。它为原子钟中布里渊激光器的频率稳定运行提供了一种新方法，