Transition between Kerr comb and stimulated Raman comb in a silica whispering gallery mode microcavity

Abstract

We theoretically and experimentally investigated the transition between modulation instability and Raman gain in a small silica microcavity with a large free-spectral range (FSR), which reveals that we can selectively switch from a four-wave mixing dominant state to a stimulated Raman scattering dominant state. Both the theoretical analysis and the experiment show that a Raman-dominant region is present between transitions of Kerr combs with different free-spectral range spacings. We can obtain a stable Kerr comb and a stable Raman state selectively by changing the driving power, coupling between the cavity and the waveguide, and laser detuning. Such a controllable transition is achieved thanks to the presence of gain competition between modulation instability and Raman gain in silica whispering gallery mode microcavities.

7 pages, 6 figures

References in corpus (4)

• Microresonator Soliton Dual-Comb Spectroscopy
• Optical combs with a crystalline whispering gallery mode resonator
• The effect on Kerr comb generation in a clockwise and counter-clockwise mode coupled microcavity
• Theoretical and experimental study of stimulated and cascaded Raman scattering in ultra-high-Q optical microcavities

Cited by in corpus (2)

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