Open AccessApodized coupled resonator waveguides
Author(s) -
J. Capmany,
Pascual Muñoz,
José David Doménech,
Miguel A. Muriel
Publication year - 2007
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.010196
Subject(s) - apodization , resonator , optics , waveguide , band pass filter , fiber bragg grating , coupling (piping) , transfer function , materials science , optical fiber , optoelectronics , physics , engineering , electrical engineering , metallurgy
In this paper we propose analyse the apodisation or windowing of the coupling coefficients in the unit cells of coupled resonator waveguide devices (CROWs) as a means to reduce the level of secondary sidelobes in the bandpass characteristic of their transfer functions. This technique is regularly employed in the design of digital filters and has been applied as well in the design of other photonic devices such as corrugated waveguide filters and fiber Bragg gratings. The apodisation of both Type-I and Type-II structures is discussed for several windowing functions.