Brillouin Backaction Thermometry for Modal Temperature Control
Abstract
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, impose strict temperature control requirements for long-term frequency-stable operation. Here, we study Brillouin back action 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 resonator 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.
Cite
@article{arxiv.2205.07181,
title = {Brillouin Backaction Thermometry for Modal Temperature Control},
author = {Yu-Hung Lai and Zhiquan Yuan and Myoung-Gyun Suh and Yu-Kun Lu and Heming Wang and Kerry J. Vahala},
journal= {arXiv preprint arXiv:2205.07181},
year = {2022}
}