Optimizing the design of coherently combined multicore fiber amplifiers
Steinkopff A, Jauregui C, Aleshire C, Klenke A, Limpert J (2021)
Publication Type: Conference contribution
Publication year: 2021
Journal
Publisher: SPIE
Book Volume: 11665
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Virtual, Online, USA
ISBN: 9781510641655
DOI: 10.1117/12.2583082
Abstract
In this work we optimize the design of coherently-combined multicore fiber amplifiers. It has been shown that increasing the number of cores in such fibers helps to increase the combinable output power. However, in counter-pumped multicore fibers, thermal effects will finally lead to strong non-uniform mode-shrinking in each core. This, in turn, will result in a significant reduction of the combining efficiency. In this study we will examine the power and energy scaling potential for different pumping schemes and different fiber designs. To this purpose, a simulation tool is used that solves the laser rate equations taking into account the resulting temperature gradient and the transverse mode distortions caused by it. In the simulation co- and counter pumped multicore fibers with a square core arrangement and a core number ranging from 2×2 up to 10×10 will be considered. Moreover, we investigate the influence of the active core size in terms of thermal effects as well as the extractable output power and energy. Particular attention is paid to the mitigation of non-uniform mode-shrinking at the fiber end-facet. By comparing the co- and counter-pumped cases, we will show that a combinable output power of 26 kW (co-pump) instead of 14 kW (counter-pump) with a 10x10 MCF and 30 µm cores should be achievable.
Involved external institutions
Germany (DE)How to cite
APA:
Steinkopff, A., Jauregui, C., Aleshire, C., Klenke, A., & Limpert, J. (2021). Optimizing the design of coherently combined multicore fiber amplifiers. In Michalis N. Zervas, Cesar Jauregui-Misas (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Virtual, Online, USA: SPIE.
MLA:
Steinkopff, Albrecht, et al. "Optimizing the design of coherently combined multicore fiber amplifiers." Proceedings of the Fiber Lasers XVIII: Technology and Systems 2021, Virtual, Online, USA Ed. Michalis N. Zervas, Cesar Jauregui-Misas, SPIE, 2021.
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