Optical phased array with linearly scalable phase shifters for 2d beam steering

EP4569377A4Pending Publication Date: 2026-06-17ADVANCED MICRO FOUNDRY PTE LTD
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
ADVANCED MICRO FOUNDRY PTE LTD
Filing Date
2022-08-10
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Conventional optical phased arrays for 2D beam steering face challenges with nonlinear scaling of optical phase shifters, leading to complex management, large footprint, and energy inefficiency, especially when using a fixed optical wavelength for beam steering in applications like LiDAR and free-space transceivers.

Method used

The implementation of an optical phased array with optical phase shifters that scale linearly with the number of array rows, allowing for 2D beam steering using a fixed optical wavelength by modulating the optical phases in waveguides along rows and columns, utilizing thermo-optic and plasma-dispersion effect-based phase shifters to steer the optical beam in both x and y dimensions.

Benefits of technology

This approach enables efficient, compact, and energy-effective 2D beam steering with a fixed optical wavelength, improving system manageability and reducing the footprint, while maintaining high precision and scalability for applications in LiDAR and free-space transceivers.

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Abstract

An optical phased array for 2D steering of an optical beam comprising an opticalwaveguide, with each waveguide having a plurality of scatterers. A first segment ofthe optical waveguide is adapted to steer the optical beam in an x-direction, and thefirst segment comprises a first optical phase shifter. A second segment of the opticalwaveguide is adapted to steer the optical beam in a different direction than the firstsegment, and the second segment comprises second optical phase shifter.
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