Passive coherent combining of two tapered laser diodes in an interferometric external cavity (poster)

Guillaume Schimmel (1) , Ioana Doyen (1) , S Janicot (1) , Marc Hanna (1) , Patrick Georges (1) , Gaëlle Lucas-Leclin (1) , J Decker (2) , Paul Crump (2) , Götz Erbert (2)

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

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.

Keywords: phase-locking; Coherent beam combining; tapered diode laser; external cavity

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]; Engineering Sciences [physics]; Optics / Photonic

Guillaume Schimmel, Ioana Doyen, S Janicot, Marc Hanna, Patrick Georges, et al.. Passive coherent combining of two tapered laser diodes in an interferometric external cavity (poster). High Power Laser Diode Conference, Oct 2015, Coventry, United Kingdom. ⟨10.1109/HPD.2015.7439670⟩. ⟨hal-01257023⟩