Tunable chromatic dispersion compensation in 40-Gb/s systems using nonlinearly chirped fiber Bragg gratings

Z. Pan, Y. W. Song, Changyuan Yu, Y. Wang, Q. Yu, J. Popelek, H. Li, Y. Li, Alan Eli Willner

Research output: Journal article publicationJournal articleAcademic researchpeer-review

80 Citations (Scopus)


Chromatic dispersion management and tunable compensation are essential features of 40-Gb/s wavelength-division-multiplexed (WDM) systems. In this paper, we demonstrate both single and multi channel 40-Gb/s tunable dispersion compensation using nonlinearly chirped FBGs (NC-FBGs). For single channel compensation, we show that the NC-FBG can be tuned over a moderate range (∼ 400 ps/nm) with tolerable third-order dispersion (< 200 ps/nm2) within the channel's data bandwidth (intrachannel third-order dispersion). For multichannel systems, we demonstrate 4 × 40-Gb/s tunable dispersion compensation using sampled NC-FBGs in two configurations. First, we show that a single, sampled NC-FBG with fairly low intrachannel third-order dispersion induces negligible penalty on all four channels. This solution has a limited dispersion tuning range because of the deleterious intra-channel third-order dispersion. We show a moderate tuning range from -300 ps/nm to -700 ps/nm. Second, we demonstrate that two inverse, concatenated, sampled NC-FBGs can cancel the high deleterious intrachannel third-order dispersion, thus extending the dispersion tuning range. This solution provides both positive and negative dispersion values by stretching the two NC-FBGs separately. A tuning range of -300 ps/nm to +300 ps/nm with zero intrachannel third-order dispersion is shown.
Original languageEnglish
Pages (from-to)2239-2246
Number of pages8
JournalJournal of Lightwave Technology
Issue number12
Publication statusPublished - 1 Jan 2002
Externally publishedYes


  • Chromatic dispersion
  • Fiber Bragg gratings (FBG)
  • Fiber-optic components
  • Optical fiber communication

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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