Cascaded X sub ((2)) Wavelength Converter in LiNbO sub 3 Waveguides with Counter-propagating Beams
08 July 1999
We report a wide-band wavelength converter based on a cascaded second-order nonlinearity in periodically-poled LiNbO sub 3 waveguides pumped at 1.5 microns. The converter uses counter-propagating beams in order to improve conversion efficiency and pump rejection. We show an internal conversion efficiency of -10 dB and a conversion bandwidth of 68 nm in a 4 cm long device.