The Investigation of Forward and Backward Brillouin Scattering in High-<i>Q</i> Chalcogenide Microspheres

Traditional optomechanical research is rarely studied in compound glass, especially chalcogenide glass. In this paper, the forward and backward Stimulated Brillouin Scattering (SBS) demonstrated for first time a glass microsphere resonator. A high-purity with high quality (Q) factor of 2.1 &#x00D7; 107 investigated using 1550 nm tunable laser. experiment, resulting mechanical vibration frequencies caused by SBS are measured at 80 MHz 7.8 GHz, respectively. The triply resonant scattering process greatly enhances light&#x2013;acoustic interactions, enabling threshold power to be 344 &#x03BC;W. work microresonator important potential applications which has higher nonlinearity low absorptions mid-infrared band.