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Updated: Aug 30, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Circular Optical Phased Array with Large Steering Range and High Resolution.

Daniel Benedikovič^1,2,3, Qiankun Liu¹, Alejandro Sánchez-Postigo^1,4

¹Department Electronics, Carleton University, Ottawa, ON K1S 5B6, Canada.

Sensors (Basel, Switzerland)

|August 26, 2022

Summary

This summary is machine-generated.

This study presents novel two-dimensional optical phased arrays with a circular design for enhanced free-space beam steering. These silicon photonics devices offer narrow beam divergence and broad operational wavelengths for advanced applications.

Keywords:

beam forming beam steering circular phased arrays field-of-view light detection and ranging optical antenna optical phased arrays silicon photonics

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Nanophotonics

Background:

Optical phased arrays (OPAs) are crucial for applications like autonomous vehicles and free-space communications.
Integrated silicon photonics enables miniaturized and efficient optical systems.
Existing OPAs often face limitations in element spacing and beam steering capabilities.

Purpose of the Study:

To design and numerically investigate novel two-dimensional optical phased arrays with a circular, concentric ring topology.
To evaluate the performance of these arrays for both single-wavelength and broadband multi-wavelength operations.
To explore the potential of these arrays for advanced on-chip photonic applications requiring fast, high-resolution beam steering.

Main Methods:

Numerical investigation of two-dimensional OPAs with 110 and 820 elements arranged in concentric rings.
Simulation of both single-wavelength (1550 nm) and broadband multi-wavelength (1535 nm to 1565 nm) operations.
Analysis of beam steering capabilities, beam divergence, and main-to-sidelobe suppression ratio.

Main Results:

Achieved narrow beam divergences of 0.5° (110-element) and 0.22° (820-element) with >10 dB main-to-sidelobe suppression.
Demonstrated large element spacing beyond sub-wavelength limits due to the circular array topology.
Obtained solid-angle beam steering up to 0.51π sr (single-wavelength) and 0.57π sr (multi-wavelength).

Conclusions:

The proposed circular OPAs offer superior beam steering performance compared to traditional linear or rectangular arrays.
This design enables efficient, wide-angle, and broadband beam steering suitable for integrated photonic applications.
The findings open new avenues for advanced optical systems in sensing, communication, and autonomous technologies.