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Related Experiment Video

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Angled multimode interferometer for bidirectional wavelength division (de)multiplexing.

Y Hu1, D J Thomson1, A Z Khokhar1

  • 1Optoelectronics Research Centre , University of Southampton , Southampton SO17 1BJ, UK.

Royal Society Open Science
|November 21, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a bidirectional wavelength division multiplexer (WDM) on silicon-on-insulator. This device uses angled multimode interferometers for efficient datacom and telecom applications, enabling integrated optical transceivers.

Keywords:
infraredsilicon photonicswavelength division (de)multiplexer

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Semiconductor Devices

Background:

  • Wavelength division multiplexing (WDM) is crucial for high-capacity optical communication systems.
  • Existing WDM devices often face challenges in wavelength matching and spatial integration.
  • Silicon-on-insulator (SOI) platform offers advantages for fabricating compact and efficient photonic devices.

Purpose of the Study:

  • To demonstrate a novel bidirectional wavelength division (de)multiplexer (WDM) on the silicon-on-insulator platform.
  • To achieve precise wavelength matching between multiplexing and demultiplexing channels.
  • To design a compact and efficient device suitable for integrated optical transceivers.

Main Methods:

  • Utilized two 4-channel angled multimode interferometers (AMMIs) sharing a common multimode interference waveguide.
  • Optimized the arrangement of input and output access waveguides to minimize optical crosstalk.
  • Employed a single lithography and etching step for simplified fabrication on the SOI platform.

Main Results:

  • Achieved excellent peak transmission wavelength matching between the two AMMIs.
  • Demonstrated minimal perturbation between the optical paths of the two AMMIs.
  • Reported low insertion loss (3-4 dB) and low crosstalk (-15 to -20 dB).

Conclusions:

  • The developed bidirectional WDM device is suitable for datacom and telecom applications, particularly for integrated optical transceivers.
  • The device offers simplified fabrication, improved transceiver design, reduced tuning requirements, and efficient space utilization.
  • The achieved performance metrics indicate the potential for practical implementation in next-generation optical communication systems.