Broadening of the second-harmonic phase-matching bandwidth in a temperature-gradient-controlled periodically poled Ti : LiNbO3 channel waveguide

Abstract

We have demonstrated broadening of the phase-matching bandwidth in a periodically poled Ti: LiNbO3 (Ti: PPLN) channel waveguide (Lambda = 16.6 mum) by using a temperature-gradient-control technique. With this technique, we have achieved a second-harmonic phase-matching bandwidth of more than 13 nm in a 74-mm-long Ti: PPLN waveguide, which has a 0.21-nm phase-matching bandwidth at a uniform temperature. (C) 2003 Optical Society of America.