Kores Cristine C, Mutter Patrick, Kianirad Hoda, Canalias Carlota, Laurell Fredrik
Opt Express. 2018 Dec 10;26(25):33142-33147. doi: 10.1364/OE.26.033142.
A 10.8 µm wide ridge waveguide was fabricated by diamond-blade dicing in an ion-exchanged periodically poled Rb-doped KTiOPO sample. The waveguide was used to generate blue second harmonic light at 468.8 nm in the TM mode through first order Type I quasi-phase matching, exploiting the large d coefficient of the crystal. It was evaluated using a cw Ti:Sapphire laser, and 6.7 µW of blue light was generated with 5.8 mW of fundamental radiation at 933.8 nm coupled through the waveguide. The results presented here pave the way for efficient nonlinear processes in a waveguide format.
通过在离子交换周期性极化掺铷磷酸钛氧钾（KTiOPO）样品中使用金刚石刀片切割制备了一条宽度为10.8 µm的脊形波导。该波导用于通过一阶I型准相位匹配在TM模式下产生468.8 nm的蓝色二次谐波光，利用了晶体的大d系数。使用连续波钛宝石激光器对其进行了评估，通过波导耦合933.8 nm的5.8 mW基频辐射产生了6.7 µW的蓝光。本文给出的结果为波导形式的高效非线性过程铺平了道路。
