Abstract

Recently the nonlinear spectrum deformation and the position shift of resonances in microspheres have been investigated [1]. The laser light was coupled to the microsphere resonator on top of an optical fiber. The laser was operated in sweeping mode with controllable wavelength and speed. The optical output has been connected to the fiber taper used for coupling of the laser radiation into the microsphere [2]. The output of the taper has been coupled to the InGaAs detector with a bandwidth of 125 MHz connected to the oscilloscope. The oscilloscope has been triggered by a signal from the Tunable Laser Source. Among the multiple resonance lines only those which exhibited a small bandwidth, and consequently guaranteeing a high Q-factor and a low threshold for nonlinear effects [1, 2], have been selected. Experimental results, are shown in Fig. 1.

© 2007 IEEE