Open AccessResonantly diode-pumped Ho^3+:Y_2O_3 ceramic 21 µm laser
Author(s) -
G. Alex Newburgh,
Akil Word-Daniels,
Arocksiamy Michael,
Larry D. Merkle,
Akio Ikesue,
Mark Dubinskii
Publication year - 2011
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.19.003604
Subject(s) - optics , laser , materials science , slope efficiency , diode , laser diode , ceramic , excited state , absorption cross section , atomic physics , optoelectronics , fiber laser , physics , cross section (physics) , quantum mechanics , composite material
We report what is believed to be the first laser operation based on Ho3+-doped Y2O3. The Ho3+:Y2O3 ceramic was resonantly diode-pumped at ~1.93 µm to produce up to 2.5 W of continuous wave (CW) output power at ~2.12 µm. The laser had a slope efficiency of ~35% with respect to absorbed power and a beam propagation factor of M2 ~1.1. We have measured the absorption and stimulated emission cross sections of Ho3+:Y2O3 at 77 K and 300 K and present the calculated gain cross section spectrum at 77 K for different excited state inversion levels.