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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Mode-selective spatial filtering for increased robustness in a mode group diversity multiplexing link.

C P Tsekrekos1, A M J Koonen

  • 1COBRA Research Institute, Eindhoven University of Technology, The Netherlands. c.tsekrekos@tue.nl

Optics Letters
|April 6, 2007
PubMed
Summary

We introduce a simple optical method to reduce signal interference in mode group diversity multiplexing (MGDM) links. This technique enhances link robustness and enables more communication channels over multimode fibers.

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Area of Science:

  • Optics and Photonics
  • Optical Communications
  • Fiber Optics

Background:

  • Mode group diversity multiplexing (MGDM) is a technique for creating independent communication channels over multimode fiber (MMF).
  • Current MGDM systems often rely on electronic methods to mitigate crosstalk among channels, limiting performance.
  • Reducing crosstalk is crucial for increasing the capacity and robustness of optical communication links.

Purpose of the Study:

  • To propose and demonstrate a simple optical method for reducing crosstalk in MGDM links.
  • To enhance the robustness and channel capacity of MGDM systems.
  • To optically mitigate crosstalk, complementing existing electronic methods.

Main Methods:

  • Implementing a lens between the graded-index MMF output and detectors.
  • Utilizing mode-selective spatial filtering (MSSF) for optical crosstalk reduction.
  • Comparing link performance with and without the proposed MSSF technique.

Main Results:

  • Successfully achieved optical reduction of crosstalk using MSSF.
  • Demonstrated increased link robustness compared to systems without MSSF.
  • Showcased the potential for a larger number of communication channels.

Conclusions:

  • The proposed simple optical method effectively reduces crosstalk in MGDM links.
  • Mode-selective spatial filtering offers a robust and efficient way to improve optical communication systems.
  • This technique paves the way for higher-capacity fiber optic communication.