~1 mJ pulsed vortex laser at 1645 nm with well-defined helicity

Yongguang Zhao; Qiyao Liu; Wei Zhou; Deyuan Shen

doi:10.1364/OE.24.015596

~1 mJ pulsed vortex laser at 1645 nm with well-defined helicity

Opt Express. 2016 Jul 11;24(14):15596-602. doi: 10.1364/OE.24.015596.

Authors

Yongguang Zhao, Qiyao Liu, Wei Zhou, Deyuan Shen

PMID: 27410832
DOI: 10.1364/OE.24.015596

Abstract

We report on a millijoule level Er:YAG ceramic pulsed vortex laser resonantly pumped by an annular beam at 1532 nm. By means of an uncoated YAG crystal plate inserting into the cavity and a proper thermal gradient on the ceramic, 1.03 mJ LG_0,-1 mode and 0.97 mJ LG_{0, + 1} mode were respectively produced, and no vortex mode instability problem was observed. We believe the directly generated millijoule level optical vortex with well-defined helicity will have potential applications in material modification and processing, high-field laser physics, and nonlinear optics, etc.