Broadband optical wavelength conversion through four-wave mixing in W3-type AlGaAs photonic crystal waveguides

We realized a wide-band wavelength conversion method through four-wave mixing in W3-type AlGaAs photonic crystal waveguides. AlGaAs exhibits a large third-order nonlinearity. Furthermore, because of its large bandgap, two-photon absorption can be avoided in the 1550 nm range. A four-wave mixing efficiency of -7 dB was obtained for a pump peak power of 7 W. Furthermore, by utilizing the two even guided bands of the W3-type photonic crystal waveguide, a conversion bandwidth greater than 38 nm was achieved with a conversion efficiency of -22 dB.

Automated summary

We achieved wide-band wavelength conversion through four-wave mixing in W3-type AlGaAs photonic crystal waveguides. The large third-order nonlinearity of AlGaAs and its large bandgap in the 1550 nm range enabled us to avoid two-photon absorption. We obtained a four-wave mixing efficiency of -7 dB for a pump peak power of 7 W, and a conversion bandwidth greater than 38 nm with a conversion efficiency of -22 dB by utilizing the two even guided bands of the W3-type photonic crystal waveguide.