Coherent beam combining of high power tapered (poster)

Philipp Albrodt (1) , Marc Hanna (1) , Frédéric Moron (1) , J Decker (2) , Winterfeldt M. (2) , G Blume (2) , Paul Crump (2) , Patrick Georges (1) , Gaëlle Lucas-Leclin (1)

1 Laboratoire Charles Fabry / Lasers
2 FBH - Ferdinand-Braun-Institut für Höchtstfrequenztechnik

We describe the coherent beam combining of three high-power tapered laser amplifiers seeded by a DFB laser at λ = 976 nm, and demonstrate a combined power of 12.9 W in a close to diffraction-limit beam at a combining efficiency of > 65%. We use individual devices on C-mounts in a multi-arm interferometer. The phase pistons of each beam are matched by automatically controlling the ridge current of the amplifiers. Increased power per element was achieved by making use of a simplified, efficiently cooled single emitter-based optical system.

Domains: Optics [physics.optics]

Philipp Albrodt, Marc Hanna, Frédéric Moron, J Decker, Winterfeldt M., et al.. Coherent beam combining of high power tapered (poster). 2017 IEEE High Power Diode Lasers & Systems Conference, Oct 2017, Coventry, United Kingdom. pp.15-16. ⟨hal-01755123⟩