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Updated: Jun 5, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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Published on: March 20, 2017

A high spectral efficiency optical OFDM scheme based on interleaved multiplexing.

Cheng Lei1, Hongwei Chen, Minghua Chen

  • 1State Key Laboratory on Integrated Optoelectronics Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.

Optics Express
|December 18, 2010
PubMed
Summary

This study introduces a novel optical multiplexing scheme by interleaving two orthogonal frequency-division multiplexing (OFDM) signals. This method doubles spectral efficiency and maintains subcarrier orthogonality for real data, proving efficient in a 10 Gb/s system.

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Quasi-light Storage for Optical Data Packets
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Last Updated: Jun 5, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Published on: March 20, 2017

Quasi-light Storage for Optical Data Packets
07:45

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Published on: February 6, 2014

Area of Science:

  • Optical communications
  • Signal processing
  • Digital modulation

Background:

  • Orthogonal frequency-division multiplexing (OFDM) is a key technology in modern optical communication systems.
  • Increasing demand for higher data rates necessitates improvements in spectral efficiency.
  • Conventional multiplexing schemes face limitations in maximizing bandwidth utilization.

Purpose of the Study:

  • To propose and experimentally demonstrate a novel optical multiplexing scheme.
  • To enhance spectral efficiency in optical communication systems.
  • To investigate the feasibility of interleaving multiple OFDM signals.

Main Methods:

  • Multiplexing two OFDM signals in an interleaved mode within the same channel space.
  • Utilizing discrete Fourier transform (DFT) for signal processing.
  • Experimental setup of a 10 Gb/s optical transmission system.

Main Results:

  • Doubled spectral efficiency compared to conventional OFDM by halving the channel space.
  • Maintained orthogonality between subcarriers for real data.
  • Achieved convenient single sideband modulation.
  • Demonstrated the feasibility and efficiency of the proposed scheme in a 10 Gb/s system.

Conclusions:

  • The proposed interleaved OFDM multiplexing scheme effectively doubles spectral efficiency.
  • The scheme maintains subcarrier orthogonality and offers computational efficiency similar to conventional OFDM.
  • This approach presents a viable and efficient solution for high-capacity optical communication systems.