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Proceedings Paper

High-power operation of coherently coupled tapered laser diodes in an external cavity
Author(s): G. Schimmel; I. Doyen; S. Janicot; M. Hanna; P. Georges; G. Lucas-Leclin; J. Decker; P. Crump; G. Erbert; S. Kaunga-Nyirenda; D. Moss; S. Bull; E. C. Larkins; U. Witte; M. Traub
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Paper 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 6.7 W in a nearly diffraction-limited beam. The rear-side architecture is then used with a laser bar of 5 tapered emitters using an interferometric extended cavity, based on a diffractive optical element. We describe the experimental evaluation of the diffractive optical element, and the phase-locked operation of the laser bar.

Paper Details

Date Published: 4 March 2016
PDF: 11 pages
Proc. SPIE 9733, High-Power Diode Laser Technology and Applications XIV, 97330I (4 March 2016); doi: 10.1117/12.2211613
Show Author Affiliations
G. Schimmel, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
I. Doyen, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
S. Janicot, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
M. Hanna, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
P. Georges, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
G. Lucas-Leclin, Lab. Charles Fabry, CNRS, Univ. Paris Saclay (France)
J. Decker, Ferdinand-Braun-Institut (Germany)
P. Crump, Ferdinand-Braun-Institut (Germany)
G. Erbert, Ferdinand-Braun-Institut (Germany)
S. Kaunga-Nyirenda, The Univ. of Nottingham (United Kingdom)
D. Moss, The Univ. of Nottingham (United Kingdom)
S. Bull, The Univ. of Nottingham (United Kingdom)
E. C. Larkins, The Univ. of Nottingham (United Kingdom)
U. Witte, Fraunhofer-Institut für Lasertechnik (Germany)
M. Traub, Fraunhofer-Institut für Lasertechnik (Germany)


Published in SPIE Proceedings Vol. 9733:
High-Power Diode Laser Technology and Applications XIV
Mark S. Zediker, Editor(s)

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