Open AccessYb-fiber-pumped, high-beam-quality, idler-resonant mid-infrared picosecond optical parametric oscillator
Author(s) -
S. Parsa,
S. Chaitanya Kumar,
Biplob Nandy,
M. Ebrahim-Zadeh
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.025436
Subject(s) - optical parametric oscillator , picosecond , optics , laser beam quality , materials science , beam (structure) , infrared , signal beam , signal (programming language) , power (physics) , laser , optoelectronics , physics , laser beams , quantum mechanics , computer science , programming language
We report an Yb-fiber-pumped picosecond optical parametric oscillator (OPO) delivering high average power in excellent beam quality throughout the mid-infrared (mid-IR). Using MgO:PPLN as the nonlinear crystal and configured as a singly-resonant oscillator in the mid-IR idler wave, the OPO provides up to 3.5 W average power in high spatial quality with M2<1.8 across a continuous tuning range of 4028-2198 nm, with M 2 <1.5 at 4000 nm. It can also deliver as much as 4.3 W of signal power in an output beam with M2<1.4 across 1446-2062 nm. The extracted idler exhibits a passive power stability better than 0.46% rms over 1 hour across the entire mid-IR tuning range. We have also investigated OPO cavity length detuning behavior about the zero-group-velocity-mismatch crossing point and its effects on output power.