Single-mode near-infrared optical parametric oscillator amplifier based on periodically poled KTiOPO_(4)

摘要

A singly resonant, single-axial-mode, optical parametric oscillator (OPO) based on periodically poled KTiOPO_(4) (PPKTP) is reported. Signal (1.68 μm) and idler (2.90 μm) optical bandwidths have been narrowed to <400 MHz by use of a diffraction grating at grazing incidence. The OPO generates 370 μJ of signal radiation when pumped by 3.1 mJ of 1.064-μm radiation. We implemented a single-pass PPKTP amplifier to yield 2.15-mJ signal and 1.17-mJ idler radiation without broadening the spectral bandwidths.