Spectroscopy and diode laser-pumped operation of Tm,Ho:YAG

Author

Fan, Tso Yee ; Huber, G. ; Byer, Robert L. ; Mitzscherlich, P.

Author_Institution

Edward L. Ginzton Lab., Stanford Univ., CA, USA

Volume

24

Issue

6

fYear

1988

fDate

6/1/1988 12:00:00 AM

Firstpage

924

Lastpage

933

Abstract

Spectroscopic measurements and analysis of diode laser-pumped operation of Tm,Ho:YAG at 2.1 mu m at room temperature have been performed. The peak effective stimulated emission cross section is measured to be 9*10/sup -21/ cm/sup 2/ at 2.091 mu m and the upper state lifetime is 8.5 ms. Under diode laser pumping, thresholds of 4.4 mW of absorbed power and slope efficiency of 19% have been demonstrated. Calculations of threshold power are performed based on the spectroscopic measurements. An energy transfer upconversion process is identified which leads to a sublinear rise in upper-state population with pump power.<>

Keywords

holmium; optical pumping; radiative lifetimes; solid lasers; stimulated emission; thulium; 2.091 micron; 2.1 micron; 4.4 mW; 8.5 ms; Tm,Ho:YAG; YAG:Tm,Ho; YAl5O12:Tm,Ho; absorbed power; diode laser-pumped operation; energy transfer upconversion process; peak effective stimulated emission cross section; pump power; room temperature; slope efficiency; spectroscopic measurements; thresholds; upper state lifetime; upper-state population; Diode lasers; Energy exchange; Laser excitation; Performance analysis; Performance evaluation; Power measurement; Pump lasers; Spectroscopy; Stimulated emission; Temperature;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.213

Filename

213