Open Access85 W VECSEL output at 1270 nm with conversion efficiency of 59 %
Author(s) -
S. Keller,
Alexei Sirbu,
В. Яковлев,
A. Caliman,
A. Mereuta,
E. Kapon
Publication year - 2015
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.23.017437
Subject(s) - materials science , optics , energy conversion efficiency , optoelectronics , laser , wafer , heat sink , physics , thermodynamics
We report on 1270 nm vertical-external-cavity surface-emitting lasers (VECSELs) with up to 59% conversion efficiency and maximum output power of 8.5 W (pump limited), at 5°C heat sink temperature. These VECSELs comprised wafer-fused gain mirrors in the flip-chip (thin-disk) heat dissipation scheme. The reflected pump light from the gain mirror surface was found to depend considerably on temperature and pump power.