Lasers, Fiber Optics, and Communications

Nyquist 4-ary pulse amplitude modulation scheme based on electrical Nyquist pulse shaping and fiber Bragg grating filter

[+] Author Affiliations
Na Liu, Xue Chen, Cheng Ju

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, P.O. Box 128, #10 XiTuCheng Road, HaiDian District, Beijing 100876, China

Qi Zhang, Huitao Wang

ZTE Corporation, #19 HuaYuanDong Road, HaiDian District, Beijing 100191, China

Opt. Eng. 54(4), 046105 (Apr 13, 2015). doi:10.1117/1.OE.54.4.046105
History: Received December 21, 2014; Accepted March 26, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Na Liu ; Xue Chen ; Cheng Ju ; Qi Zhang and Huitao Wang
"Nyquist 4-ary pulse amplitude modulation scheme based on electrical Nyquist pulse shaping and fiber Bragg grating filter", Opt. Eng. 54(4), 046105 (Apr 13, 2015). ; http://dx.doi.org/10.1117/1.OE.54.4.046105


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