Surface acoustic wave frequency comb

A. B. Matsko; A. A. Savchenkov; V. S. Ilchenko; D. Seidel; L. Maleki

doi:10.1117/12.906815

6 February 2012 Surface acoustic wave frequency comb

A. B. Matsko, A. A. Savchenkov, V. S. Ilchenko, D. Seidel, L. Maleki

Proceedings Volume 8236, Laser Resonators, Microresonators, and Beam Control XIV; 82361M (2012) https://doi.org/10.1117/12.906815
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

We investigate opto-mechanical oscillation (OMO) and subsequent generation of acoustic wave frequency combs in monolithic crystalline whispering gallery mode (WGM) resonators. The OMO is observed in resonators made of electro-optic (lithium tantalate), non-electro-optic birefringent (magnesium fluoride), and non-birefringent (calcium fluoride) materials. The phenomenon manifests itself as generation of optical harmonics separated by the eigenfrequency of a surface acoustic wave (SAW) mechanical mode of the same WGM resonator. We show that the light escaping the resonator and demodulated on a fast photodiode produces a spectrally pure radio frequency (RF) signal. For instance, we demonstrate generation of 200 MHz signals with instantaneous linewidth of 0.2 Hz.

Citation Download Citation

A. B. Matsko, A. A. Savchenkov, V. S. Ilchenko, D. Seidel, and L. Maleki "Surface acoustic wave frequency comb", Proc. SPIE 8236, Laser Resonators, Microresonators, and Beam Control XIV, 82361M (6 February 2012); https://doi.org/10.1117/12.906815

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