Optics Letters
Kilohertz laser frequency sensing with Brillouin mutually modulated cross-gain modulation
Shmuel Sternklar, Maxim Wart, Alexander Lifshitz, Shalom Bloch, Er’el Granot
Abstract
Using mutually modulated cross-gain modulation, Stokes optical frequency changes are converted into modulation phase changes with high sensitivity. In the slow-light transition regime, we demonstrate kilohertz sensitivity to the Stokes optical carrier frequency. The sensitivity is inversely proportional to the modulation frequency of the pump and Stokes beams.