13 April 2015 Nyquist 4-ary pulse amplitude modulation scheme based on electrical Nyquist pulse shaping and fiber Bragg grating filter
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Abstract
Intensity modulation and direct detection signal are sensitive to power fading and nonlinear intersymbol interference (ISI) induced by modulator chirp, fiber dispersion, and square-law photo-detection. We propose and experimentally demonstrate a Nyquist 4-ary pulse amplitude modulation and direct detection scheme relying on pulse-shaping with an electrical filter and optical equalization with a vestigial-sideband (VSB) filter in the transmitter. The power fading could be eliminated by using the VSB filter. Compared with conventional 4-ary pulse amplitude modulation, the Nyquist signal has a stronger resistance to nonlinear ISI.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Na Liu, Na Liu, Xue Chen, Xue Chen, Cheng Ju, Cheng Ju, Qi Zhang, Qi Zhang, Huitao Wang, Huitao Wang, } "Nyquist 4-ary pulse amplitude modulation scheme based on electrical Nyquist pulse shaping and fiber Bragg grating filter," Optical Engineering 54(4), 046105 (13 April 2015). https://doi.org/10.1117/1.OE.54.4.046105 . Submission:
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