Modal cut-off and the V-parameter in photonic crystal fibers

Abstract

We address the long-standing unresolved problem concerning the V-parameter in a photonic crystal fiber (PCF). Formulate the parameter appropriate for a core-defect in a periodic structure we argue that the multi-mode cut-off occurs at a wavelength lambda* which satisfies V_PCF(lambda*)=pi. Comparing to numerics and recent cut-off calculations we confirm this result.

3 pages including 2 figures. Accepted for Optics Letters

References in corpus (2)

• Effective area of photonic crystal fibers
• Experimental investigation of cut-off phenomena in non-linear photonic crystal fibers

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