Optimizing the design of coherently combined multicore fiber amplifiers
| Autor: | Christopher Aleshire, Jens Limpert, Arno Klenke, Cesar Jauregui, Albrecht Steinkopff |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Amplifier Physics::Optics 02 engineering and technology 01 natural sciences Power (physics) Transverse mode 010309 optics Core (optical fiber) Reduction (complexity) 020210 optoelectronics & photonics Laser diode rate equations 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electronic engineering Fiber Fiber simulation |
| Zdroj: | SPIE 11665, 116651Q (2021). doi:10.1117/12.2583082 Fiber Lasers XVIII: Technology and Systems : [Proceedings]-SPIE, 2021.-ISBN 97815106416559781510641662 Fiber Lasers XVIII: Technology and Systems : [Proceedings]-SPIE, 2021.-ISBN 97815106416559781510641662 Fiber Lasers XVIII: Technology and Systems, SPIE LASE, Online Only, United States, 2021-03-06-2021-03-12 |
| DOI: | 10.1117/12.2583082 |
| Popis: | 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 2x2 up to 10x10 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. |
| Databáze: | OpenAIRE |
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