We have demonstrated reshaping and bandwidth control of a second-harmonic (SH) curve in a periodically poled Ti:LiNb O3 (Ti:PPLN) waveguide (Λ=16. 6 μm) by using a local-temperature-control technique. With this technique, we have achieved several useful shapes of the SH curve such as an almost ideal sinc function, and double and multipeaks in a 74-mm -long Ti:PPLN waveguide, which has a prechirped SH curve at room temperature. More than 60% improvement of SH conversion efficiency and a 5 nm broadening of SH phase-matching bandwidth were achieved.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)