2.79 μm YSGG:Cr:Er laser pumped at 790 nm

Author

Tempus, M. ; Lüthy, W. ; Weber, H.P. ; Ostroumov, V.G. ; Shcherbakov, I.A.

Author_Institution

Inst. of Appl. Phys., Bern Univ., Switzerland

Volume

30

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

2608

Lastpage

2611

Abstract

2.79 μm quasi-CW laser operation at room temperature was achieved from a YSGG:Cr:Er crystal. The output from the crystal, which was longitudinally pumped with a Ti:sapphire laser at 790 nm, was self-terminating. Under quasi-CW pumping, the length of the emitted pulses decreased exponentially with increasing pump power. The self-terminating behavior is explained by thermal effects with a computer simulation of the population mechanisms in the crystal. This simulation considers not only the common cross-relaxation and up-conversion processes, but also the inverse processes. They turn out to be of the same importance as the normal processes. The YSGG:Cr:Er crystal depends so critically on the laser parameters that it is an ideal candidate for testing the system of rate equations

Keywords

chromium; erbium; garnets; optical pumping; scandium compounds; simulation; solid lasers; yttrium compounds; 2.79 mum; 790 nm; IR laser; Ti:sapphire laser; YSGG:Cr:Er crystal; YSGG:Cr:Er laser; YScGG:Cr; YScGa5O12:Cr; common cross-relaxation; computer simulation; emitted pulses; inverse processes; laser parameters; longitudinally pumped; normal processes; population mechanism; quasi-CW laser operation; rate equations; room temperature; self-terminating; thermal effects; up-conversion processes; Absorption; Chromium; Computer simulation; Crystals; Laser excitation; Laser theory; Physics; Pump lasers; Resonance; Temperature;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.333714

Filename

333714