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., …Traub, M. (2016). High-power operation of coherently coupled tapered laser diodes in an external cavity. Proceedings of SPIE, 9733, Article 97330I. https://doi.org/10.1117/12.2211613

• Journal Article Type: Conference Paper
• Conference Name: High-Power Diode Laser Technology and Applications XIV
• Conference Location: San Francisco, California, USA
• 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
• Journal: Proceedings of SPIE
• Print ISSN: 0277-786X
• Electronic ISSN: 0277-786X
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 9733
• Article Number: 97330I
• Book Title: High-Power Diode Laser Technology and Applications XIV
• 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
• 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.