Thermal effects in optical microspheres

Summary form only given. In this paper thermal effects in optical microspheres is analyzed. Thermal dependence of the refractive index and optical absorption give birth to the thermal nonlinearity. Thermal fluctuations in the microspheres lead throw the thermal dependence of refractive index to thermorefractive noise and to the jitter of resonances. It was shown in particular that relation of thermal and Kerr nonlinearity is very important, and in pure fused silica with low level of absorption the oscillations are suppressed due to concurrency between both nonlinear mechanisms.