Open AccessLow-threshold, narrow-line THz-wave parametric oscillator with an intra-cavity grazing-incidence grating
Author(s) -
T D Wang,
YuHsuan Lin,
S Y Chen,
AnnShyn Chiang,
Shou-Tai Lin,
Yen-Chieh Huang
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.012571
Subject(s) - optics , grating , materials science , optical parametric oscillator , lithium niobate , terahertz radiation , parametric oscillator , laser , waveguide , optoelectronics , physics
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.