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Spectral beam combining of a 980 nm tapered diode laser bar
Deepak Vijayakumar1, Ole Bjarlin Jensen, Ralf Ostendorf
1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Roskilde, Denmark. devi@fotonik.dtu.dk
Abstract:
We demonstrate spectral beam combining of a 980 nm tapered diode laser bar. The combined beam from 12 tapered emitters on the bar yielded an output power of 9.3 W at 30 A of operating current. An M2 value of 5.3 has been achieved along the slow axis. This value is close to that of a free running single tapered emitter on the bar at the same current level. The overall spectral beam combining efficiency was measured to be 63%.
