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
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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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Journal ArticleDOI
Temporal response of polymer waveguide beam scanner with thermo-optic phase-modulator array.
TL;DR: A polymeric phase-modulator array designed and fabricated and analyzed the temporal response of the TO phase modulator, which exhibited a fast rise time of 12 ms, accompanied by slight power variations appearing for a long period (over hundreds of seconds), which originated from the inherent viscoelastic effect of the polymer materials.
Proceedings ArticleDOI
Two-Dimensional Beam Steering Based on LNOI Optical Phased Array
TL;DR: In this article, a two-dimensional optical beam steering chip based on X-cut LNOI wafer was designed and fabricated to achieve a maximum angle of 18° in the phase tuning dimension with about 10 dB side lobe suppression ratio.
Journal ArticleDOI
Free-Space Applications of Silicon Photonics: A Review
TL;DR: In this article , the authors review the recent advances in beam steering technologies based on silicon photonics, including optical phased arrays, focal plane arrays, and dispersive grating diffraction.
Proceedings ArticleDOI
29.5 A Single-Chip Optical Phased Array in a 3D-Integrated Silicon Photonics/65nm CMOS Technology
Taehwan Kim,Pavan Bhargava,Christopher V. Poulton,Jelena Notaros,Ami Yaacobi,Erman Timurdogan,Christopher Baiocco,Nicholas M. Fahrenkopf,Seth Kruger,Tat Ngai,Yukta Timalsina,Michael R. Watts,Vladimir Stojanovic +12 more
TL;DR: Independent phase control for each element becomes crucial since maintaining coherence between elements becomes more difficult due to process variations, which makes OPAs a particularly attractive solid-state beamforming technology.
Journal ArticleDOI
Beam Steering with Ultracompact and Low-Power Silicon Resonator Phase Shifters
Hugo Larocque,Leonardo Ranzani,James Leatham,Jeffrey Tate,Alex Niechayev,Thomas Yengst,Tin Komljenovic,Charley Fodran,Duane Smith,Mohammad Soltani +9 more
TL;DR: This paper demonstrates silicon PIC phased array beam steering based on thermally tuned ultracompact microring resonator phase shifters with a radius of a few microns, and introduces near-field and far-field characterization techniques to enable the calibration and programming of resonators in the phased array.
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°.