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Related Experiment Videos

Compensation for multimode fiber dispersion by adaptive optics.

Xiling Shen1, Joseph M Kahn, Mark A Horowitz

  • 1Department of Electrical Engineering, Stanford University, California 94305, USA.

Optics Letters
|December 1, 2005
PubMed
Summary

Adaptive optics effectively compensates for modal dispersion in multimode fiber (MMF) digital transmissions. This technology enables error-free 10 Gbit/s data transfer over long MMF links by minimizing intersymbol interference.

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Area of Science:

  • Optical Communications
  • Photonics
  • Signal Processing

Background:

  • Modal dispersion in multimode fiber (MMF) limits digital transmission rates and distances.
  • Intersymbol interference (ISI) is a significant challenge in high-speed MMF data transmission.

Purpose of the Study:

  • To demonstrate the use of adaptive optics for mitigating modal dispersion in MMF.
  • To achieve high-speed, error-free data transmission through standard MMF.

Main Methods:

  • Employing a spatial light modulator (SLM) at the transmitter to control the launched optical field.
  • Utilizing a feedback loop from receiver-estimated ISI to adjust the SLM for minimizing dispersion effects.

Main Results:

  • Demonstrated error-free transmission of 10 Gbit/s non-return-to-zero signals.

Related Experiment Videos

  • Successful transmission over standard 50 micrometer graded-index MMFs up to 11.1 km.
  • Showcased the capability of a single SLM to compensate for modal dispersion across a 600 GHz bandwidth.

    • Conclusions:

    • Adaptive optics is a viable solution for overcoming modal dispersion limitations in MMF.
    • The demonstrated SLM-based system enables robust, high-speed optical communication over existing MMF infrastructure.