Open AccessCircuit-based method for synthesizing of coupled-resonators bandpass photonic crystal filters
Author(s) -
Zuoxing Dai,
Jiali Wang,
Yan Heng
Publication year - 2011
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.19.003667
Subject(s) - chebyshev filter , passband , band pass filter , center frequency , photonic crystal , resonator , optics , finite difference time domain method , bandwidth (computing) , ripple , photonic integrated circuit , stopband , attenuation , materials science , physics , computer science , telecommunications , quantum mechanics , voltage , computer vision
A method for synthesizing bandpass photonic crystal filters for wavelength division multiplexing (WDM) systems is presented. The proposed method permits the calculation of the physical dimensions of the crystalline structures given the desired frequency response of the filter in terms of bandwidth, in-band ripple, minimum out-of-band attenuation, and central frequency. The method, explained in detail for Chebyshev frequency responses, is equivalent circuit based. The resulting devices are very compact, have a high out-of-band attenuation, and are suitable for high density photonic integrated circuits. The validity of the proposed method is confirmed through contrasting the simulation concluded from the finite-difference time-domain (FDTD) method by the design of a third-order Chebyshev filter having a center frequency of 1 THz, a flat bandwidth of 4 GHz, and ripples of 0.5 dB in the passband.