High gain two-wave mixing in H ⁺ -implantedphotorefractiveFe:KNbO ₃ planar waveguides

Abstract

For the first time, photorefractive two-wave mixing in H+-implanted Fe:KNbO3 waveguides is reported. Exponential gains of up to 40 cm-1 and grating build-up times of ~1 ms for a pump beam power of 1 mW in the waveguide were measured at a wavelength of 514.5 nm.