Whispering gallery modes in silica microspheres are excited by a tunable continuous-wave laser through the fiber taper. Ringing phenomenon can be observed with high frequency sweeping speed. The thermal nonlinearity in the microsphere can enhance this phenomenon. Our measurement results agree very well with the theoretical predictions by the dynamic equation.
© 2009 Chinese Optics Letters
Chunhua Dong, Changling Zou, Jinming Cui, Yong Yang, Zhengfu Han, and Guangcan Guo, "Ringing phenomenon in silica microspheres," Chin. Opt. Lett. 7, 299-301 (2009)