Modified Brillouin ring laser technology for Brillouin-based sensing

We present a tunable narrow-linewidth dual pump-probe optical source based on modified Brillouin ring laser technology aimed at Brillouin-based sensing. The developed source exhibits a narrow linewidth and allows for a large tuning range, attaining <2.5 MHz bandwidth, ~200 MHz tuning range and ~0.5 mW power, thus constituting an efficient and cost-effective solution for sensing interrogators.