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Updated: Feb 2, 2026
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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
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Wavelength-division multiplexing Si photonic crystal beam steering device for high-throughput parallel sensing
Optics Express
|November 25, 2018
Summary
We developed a novel optical beam-steering device using wavelength-division multiplexing (WDM) and silicon photonic crystals. This technology enables precise beam control for enhanced sensing applications.
Area of Science:
- Photonics and Optical Engineering
- Materials Science (Silicon Photonics)
Background:
- Traditional optical phased arrays require complex phase control for beam steering.
- Existing beam-steering methods face limitations in precision and profile sharpness.
Purpose of the Study:
- To propose and demonstrate a wavelength-division multiplexing (WDM) optical beam-steering device.
- To achieve precise beam forming and steering with a sharp profile using silicon photonic crystals.
- To enhance sensing throughput in applications like light detection and ranging (LiDAR).
Main Methods:
- Fabrication of a device featuring a thermally controlled, doubly periodic Si 2D bulk photonic crystal waveguide.
- Integration of coupled microring multiplexers for wavelength channel division.
- Utilizing thermal control for beam steering and collimator lenses for 2D steering.
Main Results:
- Demonstrated beam steering of 4°-5° per wavelength channel, totaling 16° with four channels.
- Achieved 112 resolution points with four wavelengths and 448 points by switching waveguides.
- Confirmed the feasibility of 2D beam steering.
Conclusions:
- The proposed WDM optical beam-steering device offers simpler beam control compared to optical phased arrays.
- This technology enables efficient beam steering and sharp profile maintenance.
- Potential for significantly increased sensing throughput in LiDAR and other applications through parallel operation.
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