期刊
APPLIED OPTICS
卷 54, 期 20, 页码 6344-6350出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.54.006344
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资金
- Fundamental Research Funds of Foshan University [2014042]
- National Natural Science Foundation of China (NSFC) [61178030]
- Natural Science Foundation of Guangdong Province, China [S201101000122]
- Science and Technology Research & Development Funds of Foshan [2012AA100451]
- Key Project of Department of Education of Guangdong Province [2014KTSCX153]
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. (C) 2015 Optical Society of America
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