Low-threshold, narrow-line THz-wave parametric oscillator with an intra-cavity grazing-incidence grating.
We report a low-threshold, narrow-line THz-wave parametric oscillator with an intra-cavity grazing-incidence grating and a 1-mm thick, 45-mm long lithium-niobate planar waveguide. When pumped by an actively Q-switched Nd:YAG laser, the threshold energy and intensity of the parametric oscillator were about 2.2 mJ and 70 MW/cm(2), respectively. The linewidths of the output THz wave were 12 and 134 GHz with and without the intra-cavity grating, respectively.
Wang
T D
TD
Department of Electrical Engineering, Institute of Photonics Technologies, National Tsinghua University, Hsinchu 30013, Taiwan.
Lin
Y Y
YY
Chen
S Y
SY
Chiang
A C
AC
Lin
S T
ST
Huang
Y C
YC
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D053844:Lasers, Solid-State; D008872:Microwaves; D055095:Optics and Photonics / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*