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Related Experiment Videos

Thermooptic coupler for multimode optical fibers.

N Moll1, D Dolfi

  • 1Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California 94304, USA.

Applied Optics
|June 1, 1985
PubMed
Summary
This summary is machine-generated.

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This study presents an electronically controllable directional coupler for multimode optical fibers. The simple, compact, and reliable device demonstrates excellent performance, with adjustable coupling and minimal excess loss, aligning with theoretical predictions.

Area of Science:

  • Optoelectronics
  • Fiber optics engineering
  • Materials science

Background:

  • Directional couplers are essential components in optical communication systems.
  • Existing couplers may lack electronic controllability or compactness.
  • Multimode optical fibers require specialized coupler designs.

Purpose of the Study:

  • To detail the theory, design, and experimental results of an electronically controllable directional coupler for multimode optical fibers.
  • To introduce a novel, simple, compact, and highly reliable device.
  • To validate the device's performance against a theoretical model.

Main Methods:

  • Development of a theoretical model for the directional coupler.
  • Fabrication of a device using plastic-clad silica fiber.

Related Experiment Videos

  • Experimental characterization of coupling range and excess loss.
  • Comparison of experimental data with theoretical predictions.

    • Main Results:

    • The electronically controllable directional coupler exhibited a coupling range from -4 to -28 dB.
    • An exceptionally low excess loss of less than 0.2 dB was achieved over the entire coupling range.
    • Experimental results closely matched the predictions of the theoretical model.
    • The device demonstrated simple construction, compact size, and high reliability.

    Conclusions:

    • The presented electronically controllable directional coupler is a viable and high-performing component for multimode fiber applications.
    • The device's design offers a significant advancement in simplicity, size, and reliability.
    • Further improvements to the device design are possible and discussed.