Abstract
A rectangular-core large-mode-area photonic crystal fiber structure has been designed based on the principle of higher order mode filtering by introducing fluorine-doped material rods in the cladding region. The proposed structure has an effective-mode area of fundamental mode (FM) as large as at 1.064 μm with nominal loss of and at first higher order mode (FHOM), which confirms effective single-mode operation after propagation length. The same structure offers effective-mode area of at with confinement loss of for FM and for FHOM. The loss of FHOM is above from to with very small loss in FM, which offers extended single-mode operation within a broad spectral range.
© 2016 Optical Society of America
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