G. Schreiber et al., Efficient cascaded difference frequency conversion in periodically poled Ti : LiNbO3 waveguides using pulsed and cw pumping, APP PHYS B, 73(5-6), 2001, pp. 501-504
Using an FM-mode-locked Ti:Er:LiNbO3 waveguide laser as the fundamental sou
rce, wavelength conversion by cascaded chi ((2)) : chi ((2))-difference fre
quency generation with a conversion efficiency of up to +3 (-4.6) dB was de
monstrated at a pulse repetition rate of about 2 (10) GHz. In addition, mul
tichannel conversion was demonstrated with a fully packaged wavelength conv
erter using a continuous fundamental source.