High Brightness Spectral Beam Combination of High-Power Vertical-External-Cavity Surface-Emitting Lasers
ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
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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.
- Lasers and Masers