Open AccessCompact second-harmonic generation laser module with 1 W optical output power at 490 nm
Author(s) -
Christian Fiebig,
Alexander Sahm,
M. Uebernickel,
G. Blume,
B. Eppich,
K. Paschke,
G. Erbert
Publication year - 2009
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.17.022785
Subject(s) - optics , materials science , laser , laser beam quality , second harmonic generation , optical path , distributed bragg reflector , energy conversion efficiency , optoelectronics , beam (structure) , diode , harmonic , laser beams , physics , quantum mechanics
We demonstrate continues-wave 1 W at 490 nm on a 2.5 cm(3) micro-optical bench using single-path second-harmonic generation with a periodically poled MgO:LiNbO(3) bulk crystal. The pump laser is a distributed Bragg reflector tapered diode laser having a single-frequency spectrum and a pump power of 9.5 W. Based on that 1 W blue light could be achieved resulting in an optical conversion efficiency of 11%. Furthermore, the module has an output power stability of better than 2% and the blue laser beam shows an nearly diffraction limited beam quality of M(2)(sigma) = 1.2 in vertical and M(2)(sigma) = 2 in lateral direction.