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arXiv · 1510.07348

Phase-locking in cascaded stimulated Brillouin scattering

Thomas F. S. Büttner·Christopher G. Poulton·M. J. Steel·Darren D. Hudson·Benjamin J. Eggleton
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Abstract

Cascaded stimulated Brillouin scattering (SBS) is a complex nonlinear optical process that results in the generation of several optical waves that are frequency shifted by an acoustic resonance frequency. Four-wave mixing (FWM) between these Brillouin shifted optical waves can create an equally spaced optical frequency comb with a stable spectral phase, i.e. a Brillouin frequency comb (BFC). Here, we investigate phase-locking of the spectral components of BFCs, considering FWM interactions arising from the Kerr-nonlinearity as well as from coupling by the acoustic field. Deriving for the first time the coupled-mode equations that include all relevant nonlinear interactions, we examine the contribution of the various nonlinear processes to phase-locking, and show that different regimes can be obtained that depend on the length scale on which the field amplitudes vary.

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Thomas F. S. Büttner, Christopher G. Poulton, M. J. Steel, Darren D. Hudson, Benjamin J. Eggleton. 2015-10-26. Phase-locking in cascaded stimulated Brillouin scattering. https://doi.org/10.1088/1367-2630%2F18%2F2%2F025003

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