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Mathematical Problems in Engineering
Volume 2013, Article ID 740412, 5 pages
Research Article

Investigation of Dispersion and Performance Based on Ring Cavity by Birefringent Interleaver for DWDM Transmission Systems

Graduate Institute of Electrical Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung City 811, Taiwan

Received 10 September 2013; Accepted 7 October 2013

Academic Editor: Teen-Hang Meen

Copyright © 2013 Tsair-Chun Liang and Chun-Ting Chen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We theoretically investigate a 25 GHz multichannel filter based on ring cavity birefringent optical interleaver for dense wavelength division multiplexing (DWDM) transmission systems. The simulation tool used in this work is the Advanced System Analysis Program (ASAP) optical modeling software. We improve the dispersion performance by employing λ/6 and λ/4 wave plates as birefringent compensators for interleavers. The new structure exhibits a high performance with nearly zero ripple, a channel isolation greater than 102 dB, and a passband utilization of 86% within the C-band. The research results illustrate that our modified scheme can improve the dispersion of more than 76.6% in comparison with the previous studies of optical interleaver with birefringent crystal and ring cavity structures.