We report on realization of an efficient triply resonant coupling between two long lived optical modes and a high frequency surface acoustic wave (SAW) mode of the same monolithic crystalline whispering gallery mode resonator. The coupling results in an opto-mechanical oscillation and generation of a monochromatic SAW. A strong nonlinear interaction of this mechanical mode with other equidistant SAW modes leads to mechanical hyperparametric oscillation and generation of a SAW pulse train and associated frequency comb in the resonator. We visualized the comb by observing the modulation of the light escaping the resonator.
© 2011 Optical Society of America
Original Manuscript: June 8, 2011
Revised Manuscript: July 28, 2011
Manuscript Accepted: July 28, 2011
Published: August 19, 2011
A. A. Savchenkov, A. B. Matsko, V. S. Ilchenko, D. Seidel, and L. Maleki, "Surface acoustic wave opto-mechanical oscillator and frequency comb generator," Opt. Lett. 36, 3338-3340 (2011)