Fibre Optical Coupler Simulation by Comsol Multiphysics Software

Latvian Journal of Physics and Technical Sciences 2022
E. Elsts, Andis Supe, Sandis Spolītis, Kaspars Zaķis, Sergejs Olonkins, Aleksejs Udaļcovs, Rihards Mūrnieks, Uģis Seņkāns, Dmitrijs Prigunovs, Lilita Ģēģere, K. Draguns, I. Lukosevics

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).

Keywords
COMSOL MULTIPHYSICS | double-clad fibre | optical coupler | side pumping
DOI
10.2478/lpts-2022-0036
Hyperlink
https://sciendo.com/article/10.2478/lpts-2022-0036

Elsts, E., Supe, A., Spolītis, S., Zaķis, K., Olonkins, S., Udaļcovs, A., Mūrnieks, R., Seņkāns, U., Prigunovs, D., Ģēģere, L., Draguns, K., Lukosevics, I. Fibre Optical Coupler Simulation by Comsol Multiphysics Software. Latvian Journal of Physics and Technical Sciences, 2022, Vol. 59, No. 5, pp.3-14. ISSN 0868-8257. Available from: doi:10.2478/lpts-2022-0036

Publication language
English (en)