Simultaneous multichannel carrier-suppressed return-to-zero to non-return-to-zero format conversion using a fiber Bragg grating

Hui Cao, Javid Atai*, Jun Zuo, Yu Yu, Adenowo Gbadebo, Bangyun Xiong, Jie Hou, Peiying Liang, Peiying Gao, Xuewen Shu

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A novel multichannel carrier-suppressed return-to-zero (CSRZ) to non-return-to-zero (NRZ) format conversion scheme based on a single custom-designed fiber Bragg grating (FBG) with comb spectra is proposed. The spectral response of each channel is designed according to the algebraic difference between the CSRZ and NRZ spectra outlines. The tailored group delays are introduced to minimize the maximum refractive index modulation. Numerical results show that four-channel 200-GHz-spaced CSRZ signals at 40 Gbits/s can be converted into NRZ signals with high Q-factor and wide-range robustness. It is shown that our proposed FBG is robust to deviations of bandwidth and central wavelength detuning. Another important merit of this scheme is that the pattern effects are efficiently reduced owing to the well-designed spectra response.

Original languageEnglish
Pages (from-to)6344-6350
Number of pages7
JournalApplied Optics
Volume54
Issue number20
DOIs
Publication statusPublished - 9 Jul 2015

Keywords

  • all-optical devices
  • fiber Bragg gratings
  • frequency filtering

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