Synthesis of MSBS-32QAM in a DD-MZM Based Simplified Twin-SSB System via IM/DD

This paper proposes a method for synthesizing a multiple sideband superposed 32QAM (MSBS-32QAM) signal from a QPSK and an 8QAM using a dual drive Mach-Zehnder modulator (DD-MZM) via intensity modulation/direct detection (IM/DD). This technique doubles the electrical spectral efficiency (SE) compared...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 42; no. 8; pp. 2683 - 2692
Main Authors Ming, Jun, Xiao, Jiangnan, Song, Junyuan, He, Hailian, Li, Zhipei, Dong, Ze, Xin, Xiangjun
Format Journal Article
LanguageEnglish
Published New York IEEE 15.04.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Amplitude modulation
Complexity
Digital signal processing
Direct detection
Mach-Zehnder interferometers
Modulation
multiple sideband superposition
Optical communication
optical field recovery
Optical filters
Optical modulation
Optical receivers
Optical signal processing
Optical transmitters
sideband modulation
Single sideband transmission
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Summary:This paper proposes a method for synthesizing a multiple sideband superposed 32QAM (MSBS-32QAM) signal from a QPSK and an 8QAM using a dual drive Mach-Zehnder modulator (DD-MZM) via intensity modulation/direct detection (IM/DD). This technique doubles the electrical spectral efficiency (SE) compared to DD-MZM-based single sideband (SSB) modulation because the two sidebands carry different data. Such ability to carry two different sidebands doubles the SE compared to the typical double sideband (DSB) modulation while realizing the recovery of complex DSB signal via IM/DD. Digital signal processing (DSP) is used to separate and demodulate the QPSK and 8QAM signal from the MSBS-32QAM signal, saving the optical filters/polarizers/interleaves used in the twin-SSB scheme, thus reducing receiver complexity and cost.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2023.3343824