Coherent beam combining of high-power tapered amplifiers
P. Albrodt1, M. Hanna1, F. Moron1, J. Decker2, M. Winterfeldt2, G. Blume2, P. Crump2, P. Georges1 and G. Lucas-Leclin1
Published in:
IEEE High Power Diode Lasers and Systems Conference (HPD 2017), Coventry, UK, Oct. 11-12, pp. 15-16 (2017).
Abstract:
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-limited 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.
1 Laboratoire Charles Fabry, Institut d’Optique Graduate School, CNRS, Université Paris-Saclay
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Berlin, Germany
Index Terms:
Coherent Combining, Phase noise, Semiconductor optical amplifiers.
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