Fiber frequency shifter based on generation of stimulated Brillouin scattering in high-finesse ring resonators

This is the authors' abstract. We don't add key points for this paper.

We demonstrate, for the first time to our knowledge, a discretely tunable all-fiber frequency shifter based on mixing the outputs of two stimulated Brillouin scattering fiber ring resonator lasers. The frequency tuning was achieved by differentially heating the rings. The observed temperature dependence of the frequency shift was as expected, with the discrete frequency jumps being equal to the free spectral range of the resonator.