Tsinghua University

National Chung Shan Institute of Science and Technology

Tsong-Dong Wang

Yen-Chieh Huang

Jian-Hung Lin

Po-Tse Tai

Chiang-Hsin Lin

Yu-Chung Chiu

Po-Cheng Wang

Bo-Kai Feng

A dielectric grating apparatus comprises a substrate; a grating layer, disposed above the substrate; a first interference layer, disposed above the substrate; and a second interference layer, adjacent to the first interference layer, wherein a refractive index of a material of the second interference layer is greater than a refractive index of a material of the first interference layer.

Dielectric grating apparatus

A high-efficiency non-collinearly phase matched parametric oscillator is provided, wherein a laser pumps a nonlinear optical material with a plural number of flat reflection surfaces that zigzag at least one parametrically generated off-axis radiation about the pump laser beam axis via multiple reflections from the surfaces. The off-axis zigzag oscillation of the radiation establishes parametric oscillation and improves energy coupling among mixing waves in a monolithic nonlinear optical material. Preferably the pump laser has a transverse beam size covering the area of the zigzagging parametrically generated radiation. To further enhance the performance of the off-axis zigzag parametric oscillator, the other parametrically generated radiation can be seeded by an external laser source or resonated in a cavity. The present invention also includes a double-side pumped off-axis zigzag parametric oscillator installed inside a standing-wave pump-laser cavity.

Off-axis zigzag parametric oscillator

Growing community of inventors

Taoyuan, Taiwan

Tsong-Dong Wang