Improving Dynamic Range of RoF System Using Dual-Drive Mach-Zehnder Modulator

  • Joseph Zacharias
  • V. Civin
  • Vijayakumar Narayanan
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 472)

Abstract

A novel radio over fiber (RoF) system incorporating a dual-electrode dual-parallel Mach-Zehnder modulator (DE-DPMZM) is used to transmit vector signal to minimize the distortions that are caused by the Mach-Zehnder modulator (MZM) nonlinearity. The MZMs are biased such that the offset voltage in both the MZMs is opposite. A 30 MSym/s 16-QAM signal is transmitted after single-sideband modulation, and the detected signal is analyzed for its error vector magnitude (EVM) performance. The measured EVM is 8.363% which shows there is much improvement in the EVM performance. The system is cost-effective since it rectifies the nonlinearities of the Mach-Zehnder modulator using the simplest optical methods and the EVM% shows that proposed biasing results in higher dynamic range.

Keywords

RoF Dynamic range Nonlinearity 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Joseph Zacharias
    • 1
  • V. Civin
    • 1
  • Vijayakumar Narayanan
    • 2
  1. 1.Department of Electronics and CommunicationRajiv Gandhi Institute of TechnologyKottayamIndia
  2. 2.Department of Electronics and CommunicationGovernment Engineering CollegeThiruvananthapuramIndia

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