Abstract

In the last few years, several authors have reported low-threshold stimulated Brillouin scattering (SBS) and lasing using ultrahigh quality Q whispering-gallery-mode (WGM) optical resonators [1,2]. This simple technique appears as a very promising solution for applications in telecommunications or microwave photonics and opens up a new mean to develop compact narrow-linewidth lasers and ultralow phase noise microwave signal generators [2]. So far, Brillouin lasing has been demonstrated in silica and calcium fluoride (CaF₂) WGM resonators [1,2].

© 2015 IEEE