Open AccessEfficient continuous wave and quasi-continuous wave operation of a 28 μm Er:Lu_2O_3 ceramic laser
Author(s) -
Hiyori Uehara,
Ryo Yasuhara,
Shigeki Tokita,
Junji Kawanaka,
Masanao Murakami,
Seiji Shimizu
Publication year - 2017
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.25.018677
Subject(s) - continuous wave , ceramic , slope efficiency , laser , materials science , lasing threshold , optics , wavelength , spectroscopy , analytical chemistry (journal) , optoelectronics , physics , fiber laser , chemistry , quantum mechanics , composite material , chromatography
We have demonstrated a highly efficient 2.8 μm Er-doped Lu 2 O 3 ceramic laser and investigated the lasing dynamics by time-resolved spectroscopy. During room-temperature continuous wave operation, a slope efficiency of 22% was achieved with a high-quality transparent ceramic. To our knowledge, this is the highest slope efficiency obtained by an Er:Lu 2 O 3 ceramic laser. In addition, an output peak power of 1.2 W was obtained during quasi-continuous wave operation. Time-resolved spectroscopy showed that the emission wavelengths exhibited a red shift from 2715 to 2845 nm, which indicated that continuous wave operation may be possible at 2740 and 2845 nm.