Passive coherent combining of two tapered laser diodes in an interferometric external cavity
G. Schimmel1, I. Doyen1, S. Janicot1, M. Hanna1, P. Georges1, G. Lucas-Leclin1, J. Decker2, P. Crump2, G. Erbert2
Published in:
Proc. of 2015 High Power Diode Lasers and Systems Conference (HPD) and Photonex 2015, Coventry, UK, Oct.14-15, ISBN 978-1-4673-9177-1, pp. 11-12 (2015).
Abstract:
We demonstrate a rear-side phase-locking architecture with two high-brightness diode lasers. This technique is based on the passive phase-locking of emitters in an external cavity on their rear facet, and their coherent combination on the front facet. Two high-brightness high-power tapered laser diodes are coherently combined using a Michelson-based cavity. The combining efficiency is above 80% and results in an output power of 6.5 W in a nearly diffraction-limited beam.
1 Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, Univ Paris-Sud, 91127 Palaiseau, France
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
Index terms:
Coherent beam combining, External cavity, phase-locking, tapered diode laser.
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