TITLE

Photonic-crystal fiber supports two modes

AUTHOR(S)
Overton, Gail
PUB. DATE
May 2005
SOURCE
Laser Focus World;May2005, Vol. 41 Issue 5, p54
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
This article asserts that photonic-crystal fiber supports two modes. Conventional and elliptical-core twomode optical fibers have been fabricated with wavelength ranges for two-mode operation typically limited to around 150 nm. Typically, a photonic-crystal fibers (PCF) has a solid core surrounded by a holey cladding region. When the ratio of the hole diameter to the hole-spacing pitch is less than 0.45, PCFs can support single-mode operation for any wavelength. Analysis of the mode field for these twomode PCFs shows that the mode-field intensity pattern of the four second-order modes actually varies along the fiber length because of the coherent mixing of the four modes and is not stable against environmental disturbance.
ACCESSION #
16971250

 

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