Results 231 to 240 of about 2,620,500 (282)
Optics Express, 2019 International audienceIn this work, we present two-dimensional beam steering in the near-infrared using a SiN integrated circuit, containing optical phased arrays. Beam steering was achieved over a range of 17.6 degrees x 3 degrees, at a fixed wavelength
Bertrand Szelag +2 more
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Applied Optics, 2014
We demonstrate a ladar with 0.5 m class range resolution obtained by integrating a continuous-wave optical phased-array transmitter with a Geiger-mode avalanche photodiode receiver array. In contrast with conventional ladar systems, an array of continuous-wave sources is used to effectively pulse illuminate a target by electro-optically steering far ...
Juan, Montoya +3 more
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We demonstrate a ladar with 0.5 m class range resolution obtained by integrating a continuous-wave optical phased-array transmitter with a Geiger-mode avalanche photodiode receiver array. In contrast with conventional ladar systems, an array of continuous-wave sources is used to effectively pulse illuminate a target by electro-optically steering far ...
Juan, Montoya +3 more
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Phase-Combining Unit for Aliasing Suppression in Optical Phased Array
Proceedings of the 2022 Conference on Lasers and Electro-Optics Pacific Rim, 2022We proposed a phase-combining unit to suppress the aliasing effect in OPA devices. It can control 2N-1 emitters with N phase shifters. Theoretical analysis, numerical simulation, and experimental results have been completed and presented.
Dachuan Wu, Bowen Yu, Yasha Yi
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Phased array of phased arrays for free space optical communications
2003 IEEE Aerospace Conference Proceedings (Cat. No.03TH8652), 2004An aperture composed of multiple small apertures has several advantages over a large continuous aperture when practical issues are included in the analysis. For example, a single bullet can easily produce a catastrophic failure of the laser communication link if all the optical gain for the transmitter (or receiver) is derived from a single large ...
S. Serati, J. Stockley
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IETE Journal of Research, 1999
This paper presents the case of an optical phased array in analogy with its counterpart in the microwave frequency region. It consists of a planar aperture array formed by the discrete illuminated core ends of a number of monomode optical fibres placed adjacent to each other in several rows.
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This paper presents the case of an optical phased array in analogy with its counterpart in the microwave frequency region. It consists of a planar aperture array formed by the discrete illuminated core ends of a number of monomode optical fibres placed adjacent to each other in several rows.
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Integrated optical phased arrays for optical trapping
Adaptive Optics and Wavefront Control for Biological Systems VII, 2021In this paper we propose and simulate a design for an optical phased array that can produces spot sizes small enough to be used in optical trapping processes in a micro-scale. Furthermore we attempt to combat the large grating lobes that are characteristic of optical phased arrays via an optimized non-uniform spacing profile of emitter elements.
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Nanodipoles for an optical phased array
Journal of Russian Laser Research, 2007Two realizations of an optical electric dipole emitter are considered in the application to a dipole optical phased array project. Realization 1 is a dielectric disc in which a leaky wave of the E0m0 type is excited. Realization 2 is a piece of nanowire of a well-reflecting metal (Ag) coated with a dielectric layer (ZnO).
V. S. Zuev, G. Ya. Zueva
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An optical phased array for lasers
Proceedings of International Symposium on Phased Array Systems and Technology, 2002High-performance, optical phased arrays for electronic control of laser beams have recently been demonstrated. The optical aperture is lithographically fabricated to form a unity-fill-factor array of liquid-crystal-based optical phase shifters. The liquid-crystal phase shifters can be fabricated smaller than a wavelength of light, with spacings equally
T.A. Dorschner +5 more
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Optical Phased Array with Electromechanical Phase Shifters
Frontiers in Optics + Laser Science APS/DLS, 2019We propose a chip-scale optical phased array (OPA) enabling steering along two orthogonal angles using integrated electromechanical optical phase shifters. Initial experimental results from fabricated silicon nitride OPAs are presented.
Marcel W. Pruessner +7 more
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SPIE Proceedings, 1986
Basic principles of operation and design considerations are described for phased array optical systems intended to operate at visible or infrared wavelengths. General descriptions of array design considerations as determined by functional requirements are presented.
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Basic principles of operation and design considerations are described for phased array optical systems intended to operate at visible or infrared wavelengths. General descriptions of array design considerations as determined by functional requirements are presented.
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