Lasers, Fiber Optics, and Communications

Pulse-grouping transmission of optical quadrature phase-shift keying signals with time diversity multiple-input and multiple-output detection and processing

[+] Author Affiliations
Guanjun Gao, Sai Chen, Jie Zhang

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, No. 10 Xitucheng Road, Beijing 100876, China

Opt. Eng. 55(8), 086113 (Aug 29, 2016). doi:10.1117/1.OE.55.8.086113
History: Received February 21, 2016; Accepted August 9, 2016
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Abstract.  We investigate an optical pulse-overlap transmission scheme where the orthogonal condition between neighbor pulses is violated. The interferences between the grouped optical pulses are mitigated at the optical coherent receiver with time diversity multiple-input and multiple-output-based digital signal processing. Numerical simulation investigates the performance of 50% return-to-zero (RZ)-quadrature phase-shift keying (QPSK) signals, where up to four pulses are overlapped and grouped for per pulse period. In the experiment demonstration, two 50% RZ-QPSK signals are combined with different time offset between neighbor pulses, and the Q-performance as a function of optical-signal-to-noise ratio (OSNR) is compared on each pulse channel basis, with minimum OSNR penalty of only 1-dB compared to the single pulse transmission.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Guanjun Gao ; Sai Chen and Jie Zhang
"Pulse-grouping transmission of optical quadrature phase-shift keying signals with time diversity multiple-input and multiple-output detection and processing", Opt. Eng. 55(8), 086113 (Aug 29, 2016). ; http://dx.doi.org/10.1117/1.OE.55.8.086113


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