Fiber optic multiple-wavelength filter based on one dimensional photonic bandgap structures with defects
Fecha
2004Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1109/JLT.2004.827668
Resumen
In this paper, a theoretical analysis is given of an
optical fiber multiple-wavelength tunable filter based on a onedimensional
(1-D) photonic bandgap (PBG) structure with four
defects. To understand the positioning of the modes in the bandgap,
a previous analysis of structures with one and two defects is performed.
By adequate parameterization, it will be possible to control
the central wa ...
[++]
In this paper, a theoretical analysis is given of an
optical fiber multiple-wavelength tunable filter based on a onedimensional
(1-D) photonic bandgap (PBG) structure with four
defects. To understand the positioning of the modes in the bandgap,
a previous analysis of structures with one and two defects is performed.
By adequate parameterization, it will be possible to control
the central wavelengths of the various filters of the device.
Parameters responsible for this effect are the contrast of refractive
indexes of high- and low-index layers, the optical thickness of
the defects, and the number of layers stacked among the defects related
to those stacked at the extremes. In addition to this, the finesse
of the filters can be controlled by the adequate addition of layers
among defects. As a result, a simple 1-D PBG structure with defects
will permit designing almost any multiple-wavelength filter,
with immediate application in the treatment of wavelength-division-
multiplexed (WDM) signals. The possibility of the tunability
of this device can be introduced if materials are included whose
refractive index changes with some parameter, such as temperature,
voltage, or strain. As an example, liquid crystals change their
refractive index with an applied voltage, leading to a shift of the
central wavelengths of the filters. [--]
Materias
Diffraction,
Optical fiber filters,
Coupled mode analysis,
Non-homogeneous media
Editor
IEEE
Publicado en
Journal of Lightwave Technology Vol. 22, No. 6, June 2004
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported by Spanish
Ministerio de Ciencia y Tecnologia and FEDER Research Grants CICYT-TIC
2003-00909 and CICYT-TIC 2001-0877-C02-02; Gobierno de Navarra and
FPU MECD Grant.