Open AccessReduction of chromatic dispersion due to coupling for synchronized-router-based flat-passband filter using multiple-input arrayed waveguide grating
Author(s) -
Koichi Maru,
Yusaku Fujii
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.022260
Subject(s) - passband , optics , arrayed waveguide grating , dispersion (optics) , waveguide , physics , astronomical interferometer , materials science , band pass filter , wavelength division multiplexing , interferometry , wavelength
An approach to reducing the chromatic dispersion due to coupling between input waveguides before the input slab for a synchronized-router-based flat-passband filter using a multiple-input arrayed waveguide grating (AWG) is proposed. The proposed method uses phase compensation at the waveguide array of the AWG by correction of waveguide lengths. The characteristics of the flat-passband filter that consists of a multiple-input AWG combined with cascaded Mach-Zehnder interferometers (MZIs) are simulated using a theoretical model of the multiple-input AWG based on Fourier optics and the coupled-mode theory. The simulation result reveals that the chromatic dispersion within the passband can be significantly reduced by using phase compensation and additional dummy waveguides at the input just before the slab.