Passive coherent phasing of fiber laser arrays

Joshua E. Rothenberg

doi:10.1117/12.774569

25 February 2008 Passive coherent phasing of fiber laser arrays

Joshua E. Rothenberg

Proceedings Volume 6873, Fiber Lasers V: Technology, Systems, and Applications; 687315 (2008) https://doi.org/10.1117/12.774569
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

Theoretical and numerical analyses are presented of the passive coherent phasing of an array of fiber lasers that are combined in a single laser cavity by an Nx1 coupler. In an initial linear analysis it is found that the brightness gain of the passive coherent array grows linearly for a small number of fibers, however, for practical parameters, the coherent brightness gain saturates at ~ 8 - 12 for large arrays. An intensity dependent index (Kerr) nonlinearity is then introduced and it is shown that the expected maximum improvement is modest, with the coherent brightness gain saturating at 10 - 14, depending on the strength of the nonlinearity. These results are compared with recent experiments.

Citation Download Citation

Joshua E. Rothenberg "Passive coherent phasing of fiber laser arrays", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 687315 (25 February 2008); https://doi.org/10.1117/12.774569

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