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

Schimmel, G.; Doyen, I.; Janicot, S.; Hanna, M.; Georges, P.; Lucas-Leclin, G.; Decker, J.; Crump, P.; Erbert, G.; Kaunga-Nyirenda, S.; Moss, D.; Bull, S.; Larkins, E. C.; Witte, U.; Traub, M.

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.

Citation

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

• Presentation Conference Type: Edited Proceedings
• Conference Name: High-Power Diode Laser Technology and Applications XIV
• Start Date: Feb 15, 2016
• End Date: Feb 16, 2016
• Acceptance Date: Feb 13, 2016
• Online Publication Date: Mar 4, 2016
• Publication Date: May 23, 2016
• Deposit Date: Jul 28, 2016
• Publicly Available Date: Jul 28, 2016
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 9733
• Article Number: 97330I
• Series Title: SPIE - International Society for Optical Engineering. Proceedings
• Series ISSN: 1996-756X
• Book Title: High-Power Diode Laser Technology and Applications XIV
• ISBN: 9781628419689
• DOI: https://doi.org/10.1117/12.2211613
• Keywords: coherent beam combining, passive phase-locking, self-organized extended cavity, diode lasers
• Public URL: https://nottingham-repository.worktribe.com/output/788961
• Publisher URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9733/1/High-power-operation-of-coherently-coupled-tapered-laser-diodes-in/10.1117/12.2211613.short?SSO=1
• Contract Date: Jul 28, 2016