Phase-shifted photonic crystal waveguide gratings and their application for wavelength demultiplexing

Chao Chen; Xuechun Li; Hanhui Li; Kun Xu; Jintong Lin

doi:10.1117/1.2844716

1 February 2008 Phase-shifted photonic crystal waveguide gratings and their application for wavelength demultiplexing

Chao Chen, Xuechun Li, Hanhui Li, Kun Xu, Jintong Lin

Author Affiliations +

Optical Engineering, Vol. 47, Issue 2, 025006 (February 2008). https://doi.org/10.1117/1.2844716

Abstract

Standard photonic crystal (PC) waveguide gratings show a stopband only in reflection. By incorporating single or multiple phase-shift regions into the PC waveguide gratings, an extremely narrow transmission peak opens up in the reflection band. Using coupled-mode theory together with transfer-matrix formalism, it is shown that by properly choosing the magnitudes of the phase shifts, the transmission spectrum can be tailored into a nearly rectangular line shape. As a specific application, the designed phase-shifted PC waveguide gratings can be used as a filter in dense wavelength-division-multiplexed (DWDM) optical communication systems with a 100-GHz channel spacing. The theoretically calculated results are numerically verified by using two-dimensional (2-D) finite-difference time-domain (FDTD) method.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Chao Chen, Xuechun Li, Hanhui Li, Kun Xu, and Jintong Lin "Phase-shifted photonic crystal waveguide gratings and their application for wavelength demultiplexing," Optical Engineering 47(2), 025006 (1 February 2008). https://doi.org/10.1117/1.2844716

Published: 1 February 2008

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