Baker Christophe, Stapfner Sebastian, Parrain David, Ducci Sara, Leo Giuseppe, Weig Eva M, Favero Ivan
Université Paris Diderot, Sorbonne Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS-UMR 7162, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France.
Opt Express. 2012 Dec 17;20(27):29076-89. doi: 10.1364/OE.20.029076.
We report time domain observations of optical instability in high Q silicon nitride whispering gallery disk resonators. At low laser power the transmitted optical power through the disk looks chaotic. At higher power, the optical output settles into a stable self-pulsing regime with periodicity ranging from hundreds of milliseconds to hundreds of seconds. This phenomenon is explained by the interplay between a fast thermo-optic nonlinearity within the disk and a slow thermo-mechanic nonlinearity of the structure. A model for this interplay is developed which provides good agreement with experimental data and points out routes to control this instability.
我们报告了高Q值氮化硅回音壁圆盘谐振器中光学不稳定性的时域观测结果。在低激光功率下，通过圆盘传输的光功率看起来是混沌的。在较高功率下，光输出进入稳定的自脉冲状态，周期从几百毫秒到几百秒不等。这种现象是由圆盘内快速的热光非线性与结构的缓慢热机械非线性之间的相互作用所解释的。我们建立了这种相互作用的模型，该模型与实验数据吻合良好，并指出了控制这种不稳定性的途径。
