High-power operation of coherently coupled tapered laser diodes in an external cavity

Schimmel, G. and Doyen, I. and Janicot, S. and Hanna, M. and Georges, P. and Lucas-Leclin, G. and Decker, J. and Crump, P. and Erbert, G. and Kaunga-Nyirenda, S. and Moss, D. and Bull, S. and Larkins, E.C. and Witte, U. and Traub, M. (2016) High-power operation of coherently coupled tapered laser diodes in an external cavity. In: High-Power Diode Laser Technology and Applications XIV, 15-16 February 2016, San Francisco, California, United States.

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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.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Schimmel, G. [et al.], “High-power operation of coherently coupled tapered laser diodes in an external cavity", Proc. SPIE, High-power diode laser technology and Applications XIV, Editor, Mark S. Zediker, v. 9733, Article Number 97330I, (2016). doi:10.1117/12.2211613. Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Keywords: coherent beam combining, passive phase-locking, self-organized extended cavity, diode lasers
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: https://doi.org/10.1117/12.2211613
Depositing User: Eprints, Support
Date Deposited: 28 Jul 2016 07:33
Last Modified: 14 Sep 2016 10:16
URI: http://eprints.nottingham.ac.uk/id/eprint/35484

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