Stimulated Brillouin scattering and Brillouin-coupled four-wave-mixing in a silica microbottle resonator

TL;DR

This paper reports the first observation of stimulated Brillouin scattering with Brillouin lasing and Brillouin-coupled four-wave-mixing in a silica microbottle resonator, demonstrating new nonlinear optical phenomena at high Q-factors.

Contribution

It introduces the first experimental demonstration of SBS with Brillouin lasing and coupled FWM in a silica microbottle resonator, revealing new nonlinear interactions.

Findings

Brillouin lasing observed at 10.4 GHz with 0.45 mW threshold

Coupling between Brillouin and FWM observed in both directions

FWM spacing reached 7th and 9th order at 10 mW pump power

Abstract

We report the first observation of stimulated Brillouin scattering (SBS) with Brillouin lasing, and Brillouin-coupled four-wave-mixing (FWM) in an ultra-high-Q silica microbottle resonator. The Brillouin lasing was observed at the frequency of $\Omega_B=2\pi\times10.4$ GHz with a threshold power of $0.45$ mW. Coupling between Brillouin and FWM was observed in both backward and forward scattering directions with separations of $2\Omega_B$. At a pump power of $10$ mW, FWM spacing reached to 7th and 9th order anti-Stokes and Stokes, respectively.