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Fabrication and Testing of Photonic Thermometers
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Published on: October 24, 2018

Tunable silicon photonics directional coupler driven by a transverse temperature gradient.

Piero Orlandi1, Francesco Morichetti, Michael John Strain

  • 1Dipartimento di Ingegneria dell'Energia Elettrica e dell'Informazione, Università di Bologna, Bologna, Italy. piero.orlandi@unibo.it

Optics Letters
|March 19, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a tunable silicon photonic directional coupler using integrated heaters. This device precisely controls power splitting by exploiting thermal gradients for efficient optical signal management.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Directional couplers are fundamental components in photonic integrated circuits.
  • Tuning optical power splitting is crucial for various photonic applications.
  • Silicon photonics offers a scalable platform for integrated optical devices.

Purpose of the Study:

  • To present a compact, tunable directional coupler on a silicon photonic platform.
  • To demonstrate a novel tuning mechanism utilizing a transverse temperature gradient.
  • To optimize device design for enhanced tuning range and reduced power consumption.

Main Methods:

  • Fabrication of a directional coupler on a silicon photonic platform.
  • Integration of a laterally shifted heater to induce a transverse temperature gradient.
  • Exploitation of thermally induced phase velocity mismatch between coupled silicon waveguide modes.
  • Optimization of heater position and waveguide design.

Main Results:

  • Demonstration of a tunable power-splitting ratio from 0.7 to 0.01.
  • Achieved efficient operation with a maximum power dissipation of 36 mW.
  • Showcased improved efficiency in asynchronous devices with intrinsic phase mismatch.

Conclusions:

  • The presented silicon photonic directional coupler offers efficient and tunable power splitting.
  • The integrated heater-based tuning mechanism provides precise control over optical signals.
  • This technology holds promise for advanced optical signal processing and communication systems.