Title :
High brightness spectral beam combination of high-power vertical-external-cavity surface-emitting lasers
Author :
Kaneda, Yushi ; Fan, Li ; Hsu, Ta-Chen ; Peyghambarian, Nasser ; Fallahi, Mahmoud ; Zakharian, Armis R. ; Hader, Jörg ; Moloney, Jerome V. ; Stoltz, Wolfgang ; Koch, Stephan ; Bedford, Robert ; Sevian, Armen ; Glebov, Leonid
Author_Institution :
Center for Math. Sci., Arizona Univ., Tucson, AZ
Abstract :
High brightness spectral beam combination of two high-power vertical-external-cavity surface-emitting laser (VECSEL) using volume Bragg grating in a photo-thermo-refractive (PTR) glass is demonstrated. High efficiency beam combination in excess of 90% is achieved, providing an efficient method for power scaling of diffraction limited beam. The beam quality of each starting lasers was 1.68 and 1.35, and that of combined beam was 1.9. Scaling opportunities based on the parameters of VECSELs and PTR Bragg gratings are discussed
Keywords :
Bragg gratings; laser beams; optical glass; photorefractive materials; photothermal effects; semiconductor lasers; surface emitting lasers; VECSEL; diffraction limited beam; photothermo-refractive glass; spectral beam combination; vertical-external-cavity surface-emitting lasers; volume Bragg grating; Bragg gratings; Brightness; Diffraction; Glass; Laser beams; Laser modes; Laser tuning; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers; Semiconductor laser; spectral combination; vertical-external-cavity surface-emitting laser (VECSEL); volume Bragg grating (VBG);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.880758
