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Updated: Jun 29, 2026
07:23
Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics
Published on: February 5, 2020
Ultracompact folded racetrack modulator based on lithium niobate on insulator platform.
Optics Express
|February 20, 2026
Summary
Researchers developed a compact lithium niobate racetrack modulator using a folded waveguide design. This innovation significantly reduces device size while maintaining high performance for advanced optical interconnects.
Area of Science:
- Photonics and Materials Science
- Integrated Optics
- Electro-optic Devices
Background:
- Thin-film lithium niobate (LNO) is crucial for high-speed electro-optic modulators.
- Conventional LNO modulators face size limitations (cm-scale), impeding high-density integration.
Purpose of the Study:
- To overcome size constraints in LNO modulators.
- To develop an ultra-compact, broadband modulator for next-generation optical interconnects.
Main Methods:
- Proposed a novel lithium niobate racetrack modulator utilizing a folded waveguide and electrode configuration.
- Structural reconfiguration to minimize device footprint.
Main Results:
- Achieved a modulation efficiency of 8 pm/V.
- Demonstrated an electro-optic bandwidth of 30.5 GHz.
- Successfully transmitted data at 112 Gbps (56 GBaud PAM-4).
Conclusions:
- The proposed modulator reduces area by an order of magnitude compared to Mach-Zehnder modulators.
- Achieves nearly doubled bandwidth and halved footprint versus traditional racetrack modulators.
- Establishes a pathway for ultra-compact, broadband modulators in optical interconnects.
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