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Improved technique for the characterization of micro-ring resonator using low coherence measurement
Optics Letters
|June 16, 2015
Summary
A new signal-processing technique overcomes bandwidth limitations in low-coherence interferometry, enabling accurate characterization of small radius micro-ring resonators. This method improves analysis of optical waveguide devices.
Area of Science:
- Photonics and Optical Engineering
- Interferometry and Waveguide Technology
Background:
- Low-coherence interferometry offers high accuracy for optical waveguide devices.
- Incoherent light sources create distinct interferogram features for each optical path.
- Small radius micro-ring resonators suffer from cross-interference, hindering analysis.
Purpose of the Study:
- To develop a novel signal-processing technique to overcome light-source bandwidth limitations.
- To enable accurate characterization of small radius micro-ring resonators.
- To improve understanding of wavelength dependency in micro-ring resonators.
Main Methods:
- Utilized low-coherence interferometry with an incoherent light source.
- Applied a novel signal-processing technique to address cross-interference.
- Validated the technique through numerical simulations and experimental data.
Main Results:
- Successfully characterized small radius micro-ring resonators despite bandwidth limitations.
- Achieved significant improvements in extracted ring parameters.
- Demonstrated enhanced analysis of optical paths in micro-ring resonators.
Conclusions:
- The proposed signal-processing technique effectively overcomes bandwidth limitations in interferometry.
- This method provides a significant advancement for analyzing small radius micro-ring resonators.
- Enables deeper insights into the wavelength-dependent properties of micro-ring resonators.
