Experimental demonstration of the eigen modes resonant coupling in the step-index fiber with high index absorbing rods embedded into fiber cladding

Svetlana Aleshkina; Tatiana Kashaykina; Mikhail Yashkov; Mikhail Salganskii; Vladimir Velmiskin; Mikhail Bubnov; Alexey Guryanov; Mikhail Likhachev

doi:10.1117/12.2590670

18 April 2021 Experimental demonstration of the eigen modes resonant coupling in the step-index fiber with high index absorbing rods embedded into fiber cladding

Svetlana Aleshkina, Tatiana Kashaykina, Mikhail Yashkov, Mikhail Salganskii, Vladimir Velmiskin, Mikhail Bubnov, Alexey Guryanov, Mikhail Likhachev

Author Affiliations +

Proceedings Volume 11773, Micro-structured and Specialty Optical Fibres VII; 117730Z (2021) https://doi.org/10.1117/12.2590670
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

Here for the first time the technique of the resonant modes coupling is used for spectrally-selective fundamental mode suppression. In our work we considered the fiber design consisting of the low-index core surrounding by the appropriately chosen high-index absorbing rods. Mode suppression in this case happens due to the resonant core mode deformation owing to mode-anticrossing effect and its partial absorption into the rods. According to our calculations it was established that stop-band of the core fundamental mode can be easily adjusted for different practical aims by fiber bending. Furthermore, in the present work we implemented and studied passive fiber with three high-index absorbing rods incorporated into fiber cladding. The Sm was chosen as an absorbing element of the high-index rods.

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Svetlana Aleshkina, Tatiana Kashaykina, Mikhail Yashkov, Mikhail Salganskii, Vladimir Velmiskin, Mikhail Bubnov, Alexey Guryanov, and Mikhail Likhachev "Experimental demonstration of the eigen modes resonant coupling in the step-index fiber with high index absorbing rods embedded into fiber cladding", Proc. SPIE 11773, Micro-structured and Specialty Optical Fibres VII, 117730Z (18 April 2021); https://doi.org/10.1117/12.2590670

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