High-resolution aliasing-free optical beam steering
David N. Hutchison,Jie Sun,Jonathan K. Doylend,Ranjeet Kumar,John Heck,Woosung Kim,Christopher T. Phare,Avi Feshali,Haisheng Rong +8 more
- Vol. 3, Iss: 8, pp 887-890
TLDR
In this paper, a two-axis steerable optical phased array with over 500 resolvable spots and 80° steering in the phased array axis (measurement limited) and a record small divergence in both axes (0.14°).Abstract:
Many applications, including laser (LIDAR) mapping, free-space optical communications, and spatially resolved optical sensors, demand compact, robust solutions to steering an optical beam. Fine target addressability (high steering resolution) in these systems requires simultaneously achieving a wide steering angle and a small beam divergence, but this is difficult due to the fundamental trade-offs between resolution and steering range. So far, to our knowledge, chip-based two-axis optical phased arrays have achieved a resolution of no more than 23 resolvable spots in the phased-array axis. Here we report, using non-uniform emitter spacing on a large-scale emitter array, a dramatically higher-performance two-axis steerable optical phased array fabricated in a 300 mm CMOS facility with over 500 resolvable spots and 80° steering in the phased-array axis (measurement limited) and a record small divergence in both axes (0.14°). Including the demonstrated steering range in the other (wavelength-controlled) axis, this amounts to two-dimensional beam steering to more than 60,000 resolvable points.read more
Citations
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Proceedings ArticleDOI
Planar-lens Enabled Beam Steering for Chip-scale LIDAR
Josue J. Lopez,Scott Skirlo,Dave Kharas,Jamison Sloan,Jeffrey S. Herd,Paul W. Juodawlkis,Marin Soljacic,Cheryl Sorace-Agaskar +7 more
TL;DR: In this article, a lens-enabled chip-scale beam steering device for LIDAR is theoretically analyzed and experimentally demonstrated with azimuthal, ϕ range = 38.8°, and polar, θ range = 12.0°, beam-steering.
Journal ArticleDOI
CMOS-Compatible Optical Phased Array Powered by a Monolithically-Integrated Erbium Laser
Jelena Notaros,Michael R. Watts,Nanxi Li,Christopher V. Poulton,Zhan Su,Matthew J. Byrd,Emir Salih Magden,Erman Timurdogan,Christopher Baiocco,Nicholas M. Fahrenkopf +9 more
TL;DR: In this article, an advanced CMOS-compatible 300mm-wafer silicon-photonics platform is introduced that consists of a silicon layer with eight doping masks, two silicon-nitride layers, three metal and via layers, a dicing trench for smooth edge-coupled facets, and a gain-film trench that enables interaction between the gain material and waveguide layers.
Journal ArticleDOI
Silicon nitride assisted 1×64 optical phased array based on a SOI platform.
TL;DR: A 1×64 optical phased array based on a silicon on insulator (SOI) platform with integrated silicon nitride with phase shifter using a silicon waveguide with heater because of the higher thermo-optic coefficient of silicon.
Proceedings ArticleDOI
Challenges in miniaturized automotive long-range lidar system design
TL;DR: In this article, the authors discuss the current technical limitations posed on endeavors to miniaturize lidar systems for use in automotive applications and how to possibly extend those limits, focusing on long-range scanning direct time of flight LiDAR systems using APD photodetectors.
References
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Journal ArticleDOI
Two-dimensional free-space beam steering with an optical phased array on silicon-on-insulator
Jonathan K. Doylend,Martijn J. R. Heck,Jock Bovington,Jonathan D. Peters,Larry A. Coldren,John E. Bowers +5 more
TL;DR: A 16-channel, independently tuned waveguide surface grating optical phased array in silicon for two dimensional beam steering with a total field of view of 20° x 14° and full-window background peak suppression of 10 dB is demonstrated.
Journal ArticleDOI
Off-chip beam steering with a one-dimensional optical phased array on silicon-on-insulator
TL;DR: An integrated approach is followed in which a 1D optical phased array is fabricated on silicon-on-insulator in which continuous thermo-optical steering of 2.3 degrees and wavelength steering of 14.1 degrees is reported.
Journal ArticleDOI
Fully integrated hybrid silicon two dimensional beam scanner.
Jared Hulme,Jonathan K. Doylend,Martijn J. R. Heck,Jon D. Peters,Michael L. Davenport,Jock Bovington,Larry A. Coldren,John E. Bowers +7 more
TL;DR: The photonic integrated circuit (PIC) consists of 164 optical components including lasers, amplifiers, photodiodes, phase tuners, grating couplers, splitters, and a photonic crystal lens and exhibited steering over 23° x 3.6°.