Fibre Optical Coupler Simulation by Comsol Multiphysics Software

Author:

Elsts E.1,Supe A.2,Spolitis S.2,Zakis K.2,Olonkins S.3,Udalcovs A.2,Murnieks R.2,Senkans U.2,Prigunovs D.23,Gegere L.23,Draguns K.4,Lukosevics I.1,Ozolins O.2,Grube J.1,Bobrovs V.2

Affiliation:

1. Institute of Solid State Physics , University of Latvia , 8 Kengaraga Str., Riga, LV-1063 , Latvia

2. Institute of Telecommunications , Riga Technical University , 12 Azenes Str., Riga, LV-1048 , Latvia

3. AFFOC Solutions , 2-58 Jaunibas Str., Kalnciems, LV-3016 , Latvia

4. Institute of Atomic Physics and Spectroscopy , University of Latvia , 3 Jelgavas Str. - House of Science, Riga, LV-1004 , Latvia

Abstract

Abstract The paper presents a simulation model developed for a special optical coupler intended for coupling radiation from signal and pump sources used for the realization of cladding-pumped doped fibre amplifiers. The model is developed in COMSOL Multiphysics and used to assess the pumping efficiency for different side pumping angles and different numbers of electromagnetic modes. The obtained results show that the highest pumping efficiency, above 75 %, is achieved for 5–14 modes when two fibres representing the pump source and the signal source form a 10-degree angle between their central axes. The search for the optimal number of modes corresponds to the development trend in optical coupler technology where the multimode pumping by light-emitting diode (LED) replaces the classical scheme with a single-mode pumping by a laser diode (LD).

Publisher

Walter de Gruyter GmbH

Subject

Psychiatry and Mental health,Neuropsychology and Physiological Psychology

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