Solid-State MWIR Beam Steering Using Optical Phased Array on Germanium-Silicon Photonic Platform

Solid-State MWIR Beam Steering Using Optical Phased Array on Germanium-Silicon Photonic Platform

We demonstrate a chip-scale germanium-silicon optical phased array (OPA) fabricated on a CMOS-compatible platform capable of 2D beam steering in the mid-infrared wavelength range. The OPA included a specially designed grating emitter waveguide array with uniform emission intensity along the <ital...

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Bibliographic Details
Main Authors: Mathias Prost, Yi-Chun Ling, Semih Cakmakyapan, Yu Zhang, Kaiqi Zhang, Junjie Hu, Yichi Zhang, S. J. Ben Yoo
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Photonics Journal
Subjects:
Optical phased array
silicon photonics
germanium photonics
MWIR
integrated photonic chip
LIDAR
Online Access:https://ieeexplore.ieee.org/document/8896888/
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Summary:We demonstrate a chip-scale germanium-silicon optical phased array (OPA) fabricated on a CMOS-compatible platform capable of 2D beam steering in the mid-infrared wavelength range. The OPA included a specially designed grating emitter waveguide array with uniform emission intensity along the <italic>mm</italic>-length waveguide propagation to realize very sharp instantaneous field-of-view (IFOV) and wide beam-steering total-field-of-view (TFOV). The experimental results indicated lateral beam-steering TFOV up to 12.7&#x00B0; by phase-tuning the waveguide array and longitudinal TFOV up to 12&#x00B0; by wavelength tuning. The 3-dB beam divergence is 3.08&#x00B0; &#x00D7; 0.18&#x00B0;. The demonstrated OPA architecture can employ wafer-scale fabrication and integration while supporting sensing and imaging applications in the mid-infrared spectral range.
ISSN:1943-0655

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