Abstract

We report highly efficient four wave mixing in a GaInP photonic crystal waveguide. Owing to its large bandgap, the ultrafast Kerr nonlinearity of GaInP is not diminished by two photon absorption and related carrier effects for photons in the $1550\mathrm{nm}$ range. A four-wave-mixing efficiency of $-49\mathrm{dB}$ was demonstrated for cw pump and probe signals in the milliwatt range, while for pulsed pumps with a peak power of $25\mathrm{mW}$ the conversion efficiency increased to $-36\mathrm{dB}$. Measured conversion efficiency dependencies on pump probe detuning and on pump power are in excellent agreement with a simple analytical model from which the nonlinear parameter γ is extracted. γ scales approximately with the square of the slow down factor and varies from $800{\mathrm{W}}^{-1}{\mathrm{m}}^{-1}$ at a pump wavelength ${\lambda }_p=1532\mathrm{nm}\text{to}2900{\mathrm{W}}^{-1}{\mathrm{m}}^{-1}$ at ${\lambda }_p=1550\mathrm{nm}$. These values are consistent with those obtained from self phase modulation experiments in similar devices.

© 2010 Optical Society of America

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