title: Growth, spectroscopy, and laser performance of a 2.79 μm Cr,Er,Pr:GYSGG radiation-resistant crystal.
abstract: We demonstrate the growth, spectroscopy, and laser performance of a 2.79 μm Cr,Er,Pr:GYSGG radiation-resistant crystal. The lifetimes for the upper laser level (4)I(11/2) and lower laser level (4)I(13/2) are 0.59 and 0.84 ms, respectively, which are due to the doping of the Pr(3+) ions. A maximum pulse energy of 278 mJ operated at 10 Hz and 2.79 μm is obtained when pumped with a flash lamp, which corresponds to the electrical-to-optical efficiency of 0.6% and a slope efficiency of 0.7%. A maximum average power of 2.9 W at 60 Hz is achieved, which corresponds to the electrical-to-optical efficiency of 0.4% and slope efficiency of 0.8%. Compared with a Cr,Er:YSGG crystal, the Cr,Er,Pr:GYSGG crystal can be operated at a higher pulse repetition rate. These results suggest that doping deactivator Pr(3+) ions can effectively decrease the lower laser level lifetime and improve the laser repetition rate. Therefore, the application fields and range of the Cr,Er,Pr:GYSGG laser can be extended greatly due to its properties of radiation resistance and high repetition frequency.
authors.forename: Jianqiao
authors.initials: J
authors.lastname: Luo
authors.forename: Dunlu
authors.initials: D
authors.lastname: Sun
authors.forename: Huili
authors.initials: H
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Guo
authors.forename: Zhongqing
authors.initials: Z
authors.lastname: Fang
authors.forename: Xuyao
authors.initials: X
authors.lastname: Zhao
authors.forename: Maojie
authors.initials: M
authors.lastname: Cheng
authors.forename: Qingli
authors.initials: Q
authors.lastname: Zhang
authors.forename: Shaotang
authors.initials: S
authors.lastname: Yin
mesh_terms: D065638:Absorption, Radiation; D053844:Lasers, Solid-State; D013057:Spectrum Analysis