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

W. Minster Kunkel; James R. Leger

doi:10.1117/12.2506693

4 March 2019 Kramers-Kronig self-phasing effect in passive beam combining resonators

W. Minster Kunkel, James R. Leger

Proceedings Volume 10904, Laser Resonators, Microresonators, and Beam Control XXI; 109041N (2019) https://doi.org/10.1117/12.2506693
Event: SPIE LASE, 2019, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

W. Minster Kunkel and James R. Leger "Kramers-Kronig self-phasing effect in passive beam combining resonators", Proc. SPIE 10904, Laser Resonators, Microresonators, and Beam Control XXI, 109041N (4 March 2019); https://doi.org/10.1117/12.2506693

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