Self imaging configurations for passive global Coherent Laser Beam Combining

Year: 2018

Authors: Lapucci A., Ciofini M.

Autors Affiliation: Istituto Nazionale di Ottica Consiglio Nazionale delle Ricerche (C.N.R.) Largo Enrico Fermi 6, 50125 Firenze, Italy

Abstract: Parallel Laser Beam Combining is widely studied as a mean to overcome the physical limits of single laser sources. It can be obtained by injection coupling of several independent laser resonators. This of course represents a complex dynamical problem, the individual lasers being non-linear oscillators. Stable single phase solutions can be obtained for the entire system of lasers as well as local domains of phase-locked elements or chaotic behaviors. In passive systems the elements locking can be pursued by means of next-neighbor coupling or global feedback. We study self-imaging optical schemes for global feedback Coherent Beam Combining (CBC). We propose guided configurations to overcome edge-losses typical of this approach. Numerical Simulations indicate this as a viable solution for fiber lasers CBC.

Conference title: 2018 IEEE Workshop on Complexity in Engineering (COMPENG)
Place: Firenze-Italy

KeyWords: Fiber lasers; Laser beams; Laser mode locking; Locks (fasteners); Oscillators (mechanical), Coherent beams; Laser arrays; Phase-locking; Self imaging; Talbot images, Mode-locked fiber lasers
DOI: 10.1109/CompEng.2018.8536245