All-optical wavelength conversion, amplification and switching in periodically poled Ti:LNbO/sub 3/ waveguide structures

Quasi-phasematched second order nonlinear optical interactions in periodically poled Ti:LiNbO/sub 3/ channel waveguides, directional couplers and waveguide arrays are exploited to develop efficient all-optical wavelength converters, parametric amplifiers, time division (de-)multiplexers, and space-, phase-, and polarisation-switches.