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The article presents the analysis of a double-clad microstructured optical fibre (DC MOF) couplers based on the ray tracing technique. The calculations were done for couplers made of well-defined fibre structures. Such couplers can be employed in laser systems using a DC MOF as a gain medium and a side pumping method which will allow to build fully-fiberized laser systems based on active microstructured fibres.

Ray tracing methods in numerical analysis of double-clad microstructured optical fibre coupler