Optical Nyquist filters based on silicon coupled resonator optical waveguides

Ke Xu*, Jiun Yu Sung, Chi Yan Wong, Zhenzhou Cheng, Chi Wai Chow, Hon Ki Tsang

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We propose an integrated optical Nyquist filter based on silicon coupled resonator optical waveguides (CROW). The designed filter can shape the 28 Gbaud QPSK spectrum to a spectrum having 0.2 roll-off raised cosine shape with 6-dB bandwidth equals to the baud rate. The impact of the fabrication tolerance induced coupling coefficients error on the figure of merits of the filter is considered. The filter overall performance is investigated in a Nyquist-WDM system and compared with a 4th order super Gaussian filter.

Original languageEnglish
Pages (from-to)23-27
Number of pages5
JournalOptics Communications
Volume329
DOIs
StatePublished - 15 Oct 2014

Keywords

  • Coupled resonator optical waveguide
  • Nyquist-WDM
  • Silicon photonics

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    Xu, K., Sung, J. Y., Wong, C. Y., Cheng, Z., Chow, C. W., & Tsang, H. K. (2014). Optical Nyquist filters based on silicon coupled resonator optical waveguides. Optics Communications, 329, 23-27. https://doi.org/10.1016/j.optcom.2014.05.007