End-fire silicon optical phased array with half-wavelength spacing
Authors:
Open Access
- 20 December 2017
- journal article
- conference paper
- Published by AIP Publishing in APL Photonics
- Vol. 3 (1)
Abstract
We demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are terminated. The innovative design and high confinement afforded by the silicon waveguides enables λ/2 spacing (775-nm pitch) at the output thereby eliminating grating lobes and maximizing the power in the main lobe. Steering is achieved by inducing a phase shift between the waveguide feeds via integrated thermo-optic heaters. The device forms a beam with a full-width half-maximum angular width of 17°, and we demonstrate beam steering over a 64° range limited only by the element factor.Keywords
All Related Versions
Funding Information
- Johns Hopkins University Applied Physics Laboratory (IR&D)
This publication has 20 references indexed in Scilit:
- Large-scale silicon nitride nanophotonic phased arrays at infrared and visible wavelengthsOptics Letters, 2016
- Corrugated Waveguide-Based Optical Phased Array With Crosstalk SuppressionIEEE Photonics Technology Letters, 2014
- Fully integrated hybrid silicon free-space beam steering source with 32-channel phased array2014
- Large-scale nanophotonic phased arrayNature, 2013
- Hybrid III/V silicon photonic source with integrated 1D free-space beam steeringOptics Letters, 2012
- Two-dimensional free-space beam steering with an optical phased array on silicon-on-insulatorOptics Express, 2011
- 1 × 12 Unequally spaced waveguide array for actively tuned optical phased array on a silicon nanomembraneApplied Physics Letters, 2011
- Two-Dimensional Dispersive Off-Chip Beam Scanner Fabricated on Silicon-On-InsulatorIEEE Photonics Technology Letters, 2011
- Two-dimensional optical phased array antenna on silicon-on-InsulatorOptics Express, 2010
- A flat laser array aperture2010