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Kramers-Kronig self-phasing effect in passive beam combining resonators
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Paper Abstract

Passive phase adjustment via Kramers-Kronig (K-K) phase in coherent beam combining is reviewed and assessed. While recent experiments and modeling show that K-K does not improve the average output power when it is the only passive phasing mechanism in a resonator, K-K does improve the combining efficiency in the presence of other effects such as wavelength tuning, Kerr nonlinearity, and regenerative phase. For a two-laser array, an improvement in output power can be achieved by K-K alone if the constant of proportionality α between the gain and the K-K phase is very large (e.g., α = 100 rad/Neper), but this is unlikely to be practical in available materials, and does not appear to scale with array size.

Paper Details

Date Published: 4 March 2019
PDF: 9 pages
Proc. SPIE 10904, Laser Resonators, Microresonators, and Beam Control XXI, 109041N (4 March 2019); doi: 10.1117/12.2506693
Show Author Affiliations
W. Minster Kunkel, Univ. of Minnesota, Twin Cities (United States)
James R. Leger, Univ. of Minnesota, Twin Cities (United States)

Published in SPIE Proceedings Vol. 10904:
Laser Resonators, Microresonators, and Beam Control XXI
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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