Supermode analysis of seven-core photonic quasi-crystal fibers

【摘要】 We design custom-shaped modes for a sixfold symmetric photonic quasi-crystal fiber(PQF),an optical fiber with a sixfold symmetric quasi-periodic array of air holes in the cladding region.The supermodes of the PQF are calculated by the finite element method,and the coupling of an in-phase supermode for the quasi-periodic optical fiber is numerically optimized to obtain identical values.The optimization is guaranteed by the selection of appropriate PQF design parameters.The eigenvalue equation associated with a seven-core PQF is derived from a coupled mode equation.We realize mode shaping and provide the far-field distribution mode of PQFs.The results are beneficial for the structural design and uniform distribution of the in-phase supermodes of PQFs.更多还原

【Abstract】 We design custom-shaped modes for a sixfold symmetric photonic quasi-crystal fiber(PQF),an optical fiber with a sixfold symmetric quasi-periodic array of air holes in the cladding region.The supermodes of the PQF are calculated by the finite element method,and the coupling of an in-phase supermode for the quasi-periodic optical fiber is numerically optimized to obtain identical values.The optimization is guaranteed by the selection of appropriate PQF design parameters.The eigenvalue equation associated with a seven-core PQF is derived from a coupled mode equation.We realize mode shaping and provide the far-field distribution mode of PQFs.The results are beneficial for the structural design and uniform distribution of the in-phase supermodes of PQFs.更多还原