12 May 2000 Experimental and numerical investigation of field propagation in multicore fibers
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Proceedings Volume 3930, Laser Resonators III; (2000) https://doi.org/10.1117/12.385404
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States
Abstract
Multicore fiber-lasers are designed to build high-power short length fiber-lasers. In our case the active single- mode cores (micro cores) are placed on a ring inside a big pump core. The micro cores are placed together very closely so that evanescent coupling between adjacent micro cores should be provided. To understand the coupling behavior in a multicore fiber in order to phase-lock all the micro cores we measured experimentally the coupling constant between the micro cores. Simultaneously we calculated the evolution of an injected field in a multicore fiber. In the experiment and in the simulations 38 micro cores with a diameter of approximately 6.9 micrometers are placed on a ring with a diameter of 115 micrometers . The distance between adjacent cores is about 2.6 micrometers . The measured coupling constant of 2cexp equals 0.82 mm-1 is in good agreement with the value 2cth equals 0.83 mm-1. Furthermore the phase evolution in each micro core was evaluated.
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Marc Wrage, Marc Wrage, Peter Glas, Peter Glas, M. Leitner, M. Leitner, Thomas Sandrock, Thomas Sandrock, Nickolai N. Elkin, Nickolai N. Elkin, Anatoly P. Napartovich, Anatoly P. Napartovich, Alexander G. Sukharev, Alexander G. Sukharev, } "Experimental and numerical investigation of field propagation in multicore fibers", Proc. SPIE 3930, Laser Resonators III, (12 May 2000); doi: 10.1117/12.385404; https://doi.org/10.1117/12.385404
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