Open AccessOptimization of laser emission at 28 μm by Er:Lu2O3 ceramics
Author(s) -
Hiyori Uehara,
Shigeki Tokita,
Junji Kawanaka,
Daisuke Konishi,
Masanao Murakami,
Seiji Shimizu,
Ryo Yasuhara
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.003497
Subject(s) - ceramic , slope efficiency , materials science , laser , doping , optics , analytical chemistry (journal) , transparent ceramics , amplified spontaneous emission , continuous wave , emission spectrum , fiber laser , optoelectronics , composite material , spectral line , physics , chemistry , chromatography , astronomy
We have demonstrated the continuous-wave operation of a highly efficient 2.8 μm Er-doped Lu 2 O 3 ceramic laser at room temperature. An Er:Lu 2 O 3 ceramic with a doping concentration of 11 at.% afforded a slope efficiency of 29% and an output power of 2.3 W with pumping at 10 W. To our knowledge, these are the highest slope efficiency and output power obtained to date for an Er:Lu 2 O 3 ceramic laser at 2.8 μm. In addition, we prepared ceramics with various doping concentrations and determined their emission cross sections by fluorescence lifetime measurements and emission spectroscopy.