Estimation of parametric gain in GaAs/AIO(x) waveguides by fluorescence and second harmonic generation measurements
05 November 2007
Efficient parametric fluorescence is obtained from a pump wavelength lambda=1.06 mu m in low-loss, form-birefringent GaAs/AlOx waveguides. Besides showing a 1 mu m wide tuning range and the onset of amplification regime for continuous-wave pump levels around 50 mW, an 8% parametric gain is determined. This is the highest figure reported to date in semiconductor waveguides, and confirms GaAs/AlOx waveguides as a candidate for an integrated parametric optical source.