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Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity

Schimmel, G.; Doyen, I.; Janicot, S.; Ramirez, L.P.; Hanna, M.; Georges, P.; Lucas-Leclin, G.; Vilokkinen, V.; Melanen, P.; Uusimaa, P.; Decker, J.; Crump, P.; Erbert, G.; Bull, S.; Kaunga-Nyirenda, S.; Larkins, E.C.

Authors

G. Schimmel

I. Doyen

S. Janicot

L.P. Ramirez

M. Hanna

P. Georges

G. Lucas-Leclin

V. Vilokkinen

P. Melanen

P. Uusimaa

J. Decker

P. Crump

G. Erbert

S. Kaunga-Nyirenda

ERIC LARKINS eric.larkins@nottingham.ac.uk
Professor of Opto-Electronics



Abstract

We describe a new coherent beam combining architecture based on passive phase-locking of two laser diodes in a Michelson external cavity on their rear facet, and their coherent combination on the front facet. As a proof-of-principle, two ridge lasers have been coherently combined with >90 % efficiency. The phase-locking range, and the resistance of the external cavity to perturbations have been thoroughly investigated. The combined power has been stabilized over more than 15 min with an optical feedback as well as with an automatic adjustment of the driving currents. Furthermore, two high-brightness high-power tapered laser diodes have been coherently combined in a similar arrangement; the combining efficiency is 70% and results in an output power of 4 W. We believe that this new configuration combines the simplicity of passive self-organizing architectures with the optical efficiency of master-oscillator power-amplifier ones.

Publication Date Apr 23, 2015
Electronic ISSN 0277786X
Peer Reviewed Peer Reviewed
Volume 9348
Article Number 93480P
Book Title High-Power Diode Laser Technology and Applications XIII
APA6 Citation Schimmel, G., Doyen, I., Janicot, S., Ramirez, L., Hanna, M., Georges, P., …Larkins, E. (2015). Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity. In High-Power Diode Laser Technology and Applications XIII. https://doi.org/10.1117/12.2079314
DOI https://doi.org/10.1117/12.2079314
Keywords coherent combining, passive phase-locking, diode lasers, external cavity
Publisher URL http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2240065
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Schimmel, G. [et al.],"Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity", Proc. SPIE, High-Power Diode Laser Technology and Applications XIII, editor, Mark S. Zediker, v. 9348, article no. 93480P (2015). doi:10.1117/12.2079314.
Copyright 2015. 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.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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