Photonic crystal fiber design for broadband directional coupling

A novel design for a broadband directional coupler based on a photonic crystal fiber is investigated numerically. It is shown that suitable index-depressing doping of the core regions in an index-guiding twin-core photonic crystal fiber can stabilize the coupling coefficient between the cores over a...

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Bibliographic Details
Published in:Optics letters 2004-11, Vol.29 (21), p.2473-2475
Main Authors: LAEGSGAARD, Jesper, BANG, Ole, BJARKLEV, Anders
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fabrication, cladding, and splicing
Fiber waveguides, couplers, and arrays
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical materials
Optics
Photonic bandgap materials
Physics
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Summary:A novel design for a broadband directional coupler based on a photonic crystal fiber is investigated numerically. It is shown that suitable index-depressing doping of the core regions in an index-guiding twin-core photonic crystal fiber can stabilize the coupling coefficient between the cores over an extremely broad (octave-spanning) frequency range.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.29.002473