Abstract
Coherent beam combining (CBC) is a powerful technique to scale up the brightness of arrays of laser diodes [1]. As compared to spectral beam combining, it maintains a narrow spectral bandwidth. We investigate a new CBC architecture using a common external cavity on the back side of the lasers for phase locking, while coherent beam superposition of the phase-locked beams is realized on the front side. This technique leads to a separation of the phase-locking stage – which takes place in the common external cavity - and the beam combining stage – which is achieved outside the cavity. As a consequence, the electrical-to-optical efficiency of the phase-locked laser array is increased as compared to standard external cavity configurations.
© 2015 IEEE
PDF ArticleMore Like This
G. Bloom, C. Larat, E. Lallier, M. Carras, and X. Marcadet
CTuC1 CLEO: Science and Innovations (CLEO:S&I) 2011
M. Antier, J. Bourderionnet, C. Larat, E. Lallier, C. Scarcella, J. Su Lee, P. O’Brien, T. Spuesens, G. Lepage, P. Verheyen, P. Absil, and A. Brignon
CJ_1_4 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2015
D. Kabeya, V. Kermène, A. Desfarges-Berthelemot, A. Tonello, and A. Barthélémy
CJ_1_5 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2015