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

Jun Ming, Jiangnan Xiao, Junyuan Song, Hailian He, Zhipei Li, Ze Dong, Xiangjun Xin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2683-2692
Number of pages10
JournalJournal of Lightwave Technology
Volume42
Issue number8
DOIs
Publication statusPublished - 15 Apr 2024

Keywords

  • Direct detection
  • multiple sideband superposition
  • optical field recovery
  • sideband modulation

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