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The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
Published on: December 5, 2025
Wavelength tracking with thermally controlled silicon resonators.
Ciyuan Qiu1, Jie Shu, Zheng Li
1Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA.
Optics Express
|March 30, 2011
Summary
We demonstrate feedback control for silicon dual-ring resonators. This method stabilizes the resonant wavelength, enabling robust microring electro-optic modulators in dynamic settings.
Area of Science:
- Photonics and Optical Engineering
- Materials Science (Silicon Photonics)
Background:
- Silicon microring resonators are key components in integrated photonics.
- Maintaining precise resonant wavelengths is crucial for device performance but challenging due to variations and environmental shifts.
Purpose of the Study:
- To experimentally demonstrate a feedback control system for stabilizing the resonant wavelength of a silicon dual-ring resonator.
- To enable the use of microring-based electro-optic modulators in dynamic and unpredictable environments.
Main Methods:
- Utilized a silicon dual-ring resonator architecture.
- Implemented a feedback control loop using optical scattering differences between coupled microring resonators as the feedback signal.
- Employed thermo-optic tuning with integrated micro-heaters for wavelength control.
Main Results:
- Successfully demonstrated feedback control of the resonant wavelength.
- The control scheme effectively aligned the resonator's central wavelength with the input wavelength.
- Showcased the system's ability to compensate for fabrication variations, temperature shifts, and laser wavelength drift.
Conclusions:
- The developed feedback control scheme provides a robust method for wavelength stabilization in silicon microring resonators.
- This technique enhances the reliability and applicability of microring-based electro-optic modulators in real-world, dynamic conditions.
