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

Guanjun Gao; Sai Chen; Jie Zhang

doi:10.1117/1.OE.55.8.086113

29 August 2016 Pulse-grouping transmission of optical quadrature phase-shift keying signals with time diversity multiple-input and multiple-output detection and processing

Guanjun Gao, Sai Chen, Jie Zhang

Author Affiliations +

Optical Engineering, Vol. 55, Issue 8, 086113 (August 2016). https://doi.org/10.1117/1.OE.55.8.086113

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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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," Optical Engineering 55(8), 086113 (29 August 2016). https://doi.org/10.1117/1.OE.55.8.086113

Published: 29 August 2016

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