Talbot fiber: a poorman’s approach to coherent combining

Cesar Jauregui; Albrecht Steinkopff; Jens Limpert

doi:10.1117/12.2543380

21 February 2020 Talbot fiber: a poorman’s approach to coherent combining

Cesar Jauregui, Albrecht Steinkopff, Jens Limpert

Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 1126011 (2020) https://doi.org/10.1117/12.2543380
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

In this work we present a multicore fiber design that exploits the Talbot effect to carry out the beam splitting and recombination inside of the fiber. This allows reducing the complexity of coherent combining systems since it makes the splitting and combining subsystems together with the active stabilization redundant. In other words, such a multicore fiber behaves for the user as a single core fiber, since the energy is coupled just in a single core and it is extracted from the same core. This work describes the operating principle of this novel fiber design and analyzes its performance in high power operation using a simulation model based on the supermode theory. This includes a study on the impact on non-linear effects, on the amplification efficiency, on the thermal resilience of this design and on the performance dependence on the pump direction. Moreover, some design guidelines will be provided to tailor the characteristics of the fiber. Finally, it will be discussed how these fibers can be used to increase the TMI threshold of fiber laser systems.

Citation Download Citation

Cesar Jauregui, Albrecht Steinkopff, and Jens Limpert "Talbot fiber: a poorman’s approach to coherent combining", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 1126011 (21 February 2020); https://doi.org/10.1117/12.2543380

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