Compact second-harmonic generation laser module with 1 W optical output power at 490 nm.
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.
Fiebig
Christian
C
Ferdinand-Braun-Institut für Höchstfrequenztechnik,Gustav-Kirchhoff-Str.4 12489 Berlin, Germany. Christian.Fiebig@FBH-Berlin.de
Sahm
Alexander
A
Uebernickel
Mirko
M
Blume
Gunnar
G
Eppich
Bernd
B
Paschke
Katrin
K
Erbert
Götz
G
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D008904:Miniaturization