Open AccessTunable 2-μm optical vortex parametric oscillator
Author(s) -
Taximaiti Yusufu,
Yu Tao,
Masaki Yamada,
Katsuhiko Miyamoto,
Takashige Omatsu
Publication year - 2012
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.20.023666
Subject(s) - topological quantum number , optics , optical parametric oscillator , physics , optical vortex , vortex , wavelength , signal beam , beam (structure) , quantum mechanics , thermodynamics
We generated tunable 2-μm optical vortex pulses with a topological charge of 1 or 2 in the wavelength range 1.953-2.158 μm by realizing anisotropic transfer of the topological charge from the pump beam to the signal output in a vortex-pumped half-symmetric optical parametric oscillator. A maximum vortex output energy of 2.1 mJ was obtained at a pump energy of 22.8 mJ, which corresponds to a slope efficiency of 15%. The topological charges of the signal and idler output were investigated using a shearing interferometric technique employing a low-spatial-frequency transmission grating.