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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Heterogeneous silicon photonics sensing for autonomous cars.
Weiqiang Xie,Tin Komljenovic,Jinxi Huang,Minh A. Tran,Michael L. Davenport,Alfredo Torres,Paolo Pintus,John E. Bowers +7 more
TL;DR: The recent research and the development of interferometric optical gyroscopes and LiDAR sensors are presented and a fully integrated gyroscope front-end occupying an area of only 4.5 mm2 is shown.
Journal ArticleDOI
2D broadband beamsteering with large-scale MEMS optical phased array
Youmin Wang,Guangya Zhou,Xiaosheng Zhang,Kyungmok Kwon,Pierre-A. Blanche,Nicholas Triesault,Kyoungsik Yu,Ming C. Wu +7 more
TL;DR: In this paper, a large-scale 2D OPA with novel microelectro-mechanical-system (MEMS)-actuated phase shifters is reported, where wavelength-independent phase shifts are realized by physically moving a grating element in the lateral direction.
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Wafer-scale silicon photonic switches beyond die size limit
TL;DR: In this article, the authors proposed to use wafer-scale integration to overcome the die size limit and fabricated a 240×240 switch by lithographically stitching a 3×3 array of identical 80×80 switch blocks across reticle boundaries.
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A Review and Perspective on Optical Phased Array for Automotive LiDAR
Ching-Pai Hsu,Boda Li,Braulio Solano-Rivas,Amar R. Gohil,Pak Hung Chan,Andrew D. Moore,Valentina Donzella +6 more
TL;DR: Current AV sensor challenges are highlighted, and the strengths and weaknesses of the perception sensor currently deployed are analyzed, and current factors hindering the affirmation of silicon photonics OPAs and their future research directions are discussed.
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A large-scale microelectromechanical-systems-based silicon photonics LiDAR
TL;DR: In this article , a 16,384-pixel LiDAR with a wide field of view (FoV, 70° × 70°), a narrow beam divergence (0.050° × 0.049°), and a random access beam addressing with sub-MHz operation speed is reported.
References
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Large-scale nanophotonic phased array
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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°.