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Updated: Jun 12, 2026
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
Summary
We developed voltage-tunable wavelength filters using titanium-diffused lithium niobate (LiNbO3). These filters enable efficient cascading for combining or separating multiple optical channels.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Integrated Optics
Background:
- Optical communication systems require precise wavelength control.
- Existing wavelength filters present limitations in tunability and integration.
- Lithium niobate (LiNbO3) is a key material for electro-optic devices.
Purpose of the Study:
- To design and demonstrate voltage-tunable wavelength filters.
- To achieve specific channel separations and tuning rates.
- To explore the cascading potential for multi-channel optical signal processing.
Main Methods:
- Fabrication of filters in titanium-diffused LiNbO3.
- Utilizing a nonsymmetric interferometer design.
- Characterization of channel separation and tuning rates with applied voltage.
Main Results:
- Achieved channel separations of 11-31 nm at 1300 nm wavelength.
- Demonstrated tuning rates ranging from 3-10 nm/V.
- Verified the periodic wavelength response suitable for cascading.
Conclusions:
- Voltage-tunable filters in LiNbO3 offer efficient optical channel management.
- The nonsymmetric interferometer design provides practical performance metrics.
- Cascading capability enhances the potential for complex optical signal routing.
