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Optical Engineering

Pulse-grouping transmission of optical quadrature phase-shift keying signals with time diversity multiple-input and multiple-output detection and processing
Author(s): Guanjun Gao; Sai Chen; Jie Zhang
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Paper 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.

Paper Details

Date Published: 29 August 2016
PDF: 6 pages
Opt. Eng. 55(8) 086113 doi: 10.1117/1.OE.55.8.086113
Published in: Optical Engineering Volume 55, Issue 8
Show Author Affiliations
Guanjun Gao, Beijing Univ. of Posts and Telecommunications (China)
Sai Chen, Beijing Univ. of Posts and Telecommunications (China)
Jie Zhang, Beijing Univ. of Posts and Telecommunications (China)

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