SuperReceiver Design for Superchannel Coherent Optical Systems |
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Authors: | Cheng Liu Jie Pan Thomas Detwiler Andrew Stark Yu-Ting Hsueh Gee-Kung Chang and Stephen E. Ralph |
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Affiliation: | (School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA) |
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Abstract: | In this paper, we propose a novel super-receiver architecture for Nyquist-wavelength-division-multiplexing (WDM) superchannel optical coherent systems. As opposed to a conventional coherent receiver, where each subchannel is demodulated independently, the proposed super-receiver jointly detects and demodulates multiple subchannels simultaneously. By taking advantage of information from side channels that use joint DSP to cancel interchannel interference (ICI), the proposed super-receiver performs much better than a conventional receiver. This architecture also has the potential to compensate for cross-channel impairments caused by linear and nonlinear effects. We examine the proposed architecture through experiment and simulation. OSNR is improved by more than 5 dB after 1280 km fiber transmission with narrow channel spacing. |
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Keywords: | superchannel joint DSP ICI coherent receiver |
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