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Adhesively bonded Ce:YIG/SOI integrated optical circulator.

Samir Ghosh1, Shahram Keyvaninia, Wim Van Roy

  • 1Photonics Research Group, Department of Information Technology, Ghent University, Gent, Belgium. samir.ghosh@intec.ugent.be

Optics Letters
|March 19, 2013
PubMed
Summary

Researchers demonstrated a silicon-on-insulator optical circulator using a magneto-optical garnet. This device achieves 22 dB isolation at 1562 nm, showing potential for integrated photonic applications.

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Area of Science:

  • Integrated photonics
  • Materials science
  • Optoelectronics

Background:

  • Optical circulators are essential non-reciprocal devices for photonic integrated circuits.
  • Silicon-on-insulator (SOI) platform offers excellent optical properties and scalability.
  • Magneto-optical materials are key for non-reciprocal device operation.

Purpose of the Study:

  • To demonstrate a 3-port optical circulator on the SOI platform.
  • To integrate a magneto-optical material with a Mach-Zehnder interferometer (MZI) circuit.
  • To characterize the performance of the integrated optical circulator.

Main Methods:

  • Fabrication of an MZI circuit on SOI.
  • Bonding of a cerium-doped yttrium iron garnet (Ce:YIG) layer onto the MZI.

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  • Application of an external magnetic field transversal to light propagation.
  • Measurement of power transmission and isolation between ports.

    • Main Results:

    • Successful integration of Ce:YIG on SOI using adhesive bonding.
    • Demonstration of optical circulation functionality.
    • Achieved an isolation of 22 dB at a wavelength of 1562 nm.

    Conclusions:

    • The demonstrated device represents a viable approach for on-chip optical circulators.
    • The SOI platform combined with magneto-optical garnets is promising for integrated non-reciprocal photonics.
    • Further optimization could lead to improved performance for advanced photonic systems.