PCF based optical parametric oscillators and amplifiers

This study demonstrates photonic crystal fiber (PCF) based optical parametric oscillators and amplifiers. In the experiment, a wide range of fibres with varying zero GVD points around the visible red pump wavelength are used. The resulting upshifted sideband is in the yellow region of the spectrum of pumping in the normal dispersion regime (low group index mode) in agreement with simple predictions based on the linear phase matching curve, while the sidebands corresponding to conventional modulation instability are close to the pump wavelength when pumping in the anomalous dispersion regime (the high group index mode of the fibre).