Title :
Influence of Dispersive Coupling Coefficient in Microring Channel Drop Filters
Author :
Chen, Qin ; Yang, Yue-De ; Huang, Yong-Zhen
Author_Institution :
Inst. of Semicond., Chinese Acad. of Sci., Beijing
Abstract :
Wide transmission dips are observed in the through spectra in microring and racetrack channel drop filters by two-dimensional finite-difference time-domain (FDTD) simulation. The transmission spectra, which reflect the coupling efficiency, are also calculated from the FDTD output as the pulse just travels one circle inside the resonator. The results indicate that the dips are caused by the dispersion of the coupling coefficient between the input waveguide and the resonator. In addition, a near-zero channel drop on resonance and a large channel drop off resonance are observed due to the near zero coupling coefficient and a large coupling coefficient, respectively. If the width of the input waveguide is different from that of the ring resonator, the oscillation of the coupling coefficient can be greatly suppressed
Keywords :
finite difference time-domain analysis; light reflection; micro-optics; optical dispersion; optical filters; optical resonators; optical waveguides; channel drop filters; coupling coefficient dispersion; dispersive coupling coefficient; finite-difference time-domain simulation; microring filters; optical resonator; racetrack filters; transmission dips; transmission spectra; Couplings; Dispersion; Finite difference methods; Optical filters; Optical resonators; Optical ring resonators; Optical waveguides; Resonance; Resonator filters; Time domain analysis; FDTD method; microresonators; optical filters; optical waveguides;
Conference_Titel :
Transparent Optical Networks, 2006 International Conference on
Conference_Location :
Nottingham
Print_ISBN :
1-4244-0235-2
Electronic_ISBN :
1-4244-0236-0
DOI :
10.1109/ICTON.2006.248449
