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Updated: Jun 5, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Wide-bandwidth continuously tunable optical delay line using silicon microring resonators.

Jaime Cardenas1, Mark A Foster, Nicolás Sherwood-Droz

  • 1School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA.

Optics Express
|December 18, 2010
PubMed
Summary
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We developed a distortion-free tunable optical delay system using silicon microring resonators. This compact device offers a 135 ps delay with a 10 GHz bandwidth, enabling precise optical signal control.

Area of Science:

  • Photonics and Optical Engineering
  • Materials Science

Background:

  • Optical delay lines are crucial for signal processing and telecommunications.
  • Existing tunable delay technologies often face limitations in bandwidth, tunability, or device footprint.

Purpose of the Study:

  • To demonstrate a novel, compact, and high-performance tunable optical delay line.
  • To leverage silicon microring resonators for distortion-free optical delay generation.

Main Methods:

  • Utilized thermally tuned silicon microring resonators in a balanced configuration.
  • Integrated the resonators onto a compact chip measuring 30 µm x 250 µm.

Main Results:

  • Achieved a distortion-free tunable optical delay of up to 135 picoseconds (ps).

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  • Demonstrated a wide operational bandwidth of 10 gigahertz (GHz).
  • The device exhibited simplicity in control and a compact form factor.

    • Conclusions:

    • Thermally tuned silicon microring resonators offer a promising solution for high-performance optical delay lines.
    • The balanced configuration enables precise and distortion-free delay control.
    • The compact and efficient design is suitable for integration into various photonic systems.