Gotowe bibliografie tematyczne / Optical phased array (OPA)

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Gotowa bibliografia na temat „Optical phased array (OPA)”

Autor: Grafiati
Data publikacji: 30 listopada 2024

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Artykuły w czasopismach na temat "Optical phased array (OPA)"

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Liu, Qiankun, Tom Smy, Ahmad Atieh, Pavel Cheben, Alejandro Sánchez-Postigo i Winnie N. Ye. "Integrated circular optical phased array". EPJ Web of Conferences 255 (2021): 01004. http://dx.doi.org/10.1051/epjconf/202125501004.

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Existing OPAs are typically based on 2D rectangular arrays or 1D linear arrays. Both approaches present a limited field-of-view (FOV) due to the presence of the grating lobes when the element spacing is larger than λ/2. To address the need for an increased steering range, we propose a new design strategy of an OPA system utilizing a 2D circular phased array, with a substantially increased FOV. We present a circular OPA using a demonstrated antenna element design, with an 820-element array. A steering range ΩSR calculated as a solid angle of 0.51π sr, and an angular beamwidth of 0.22°, was achieved. The array exhibits a sidelobe suppression larger than 10 dB, and a FOV of 2π sr. Although the performance is limited by the far field pattern of the individual antenna we chose, our circular OPA achieved, to the best of our knowledge, the largest steering range reported to date compared to the state-of-the-art integrated optical phased arrays reported in literature.
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Wang, Zheng, Yibo Yang, Ruiting Wang, Guangzhen Luo, Pengfei Wang, Yanmei Su, Jiaoqing Pan i Yejin Zhang. "Improved SPGD Algorithm for Optical Phased Array Phase Calibration". Applied Sciences 12, nr 15 (5.08.2022): 7879. http://dx.doi.org/10.3390/app12157879.

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A chip-level optical beam steerer is an inevitable choice for next-generation light detection and ranging (LiDAR). The research on optical phased array (OPA) is the most intriguing. However, the complexity of control and calibration speed limit the full potential as the number of channels increases. In this paper, an improved stochastic parallel gradient-descent algorithm combined with the Nesterov accelerated gradient method (NSPGD) is presented and applied in a 512-channel OPA. This algorithm can reduce the phase calibration time of large-scale OPA and demonstrates a better convergence performance than traditional SPGD. Compared with the traditional SPGD and hill-climbing (HC) algorithm, optimized convergence performance of NSPGD is shown. The side mode suppression ratio (SMSR) of over 10dB for 512-channel OPA is obtained with the NSPGD algorithm, and the convergence speed is twice that of traditional SPGD. In addition, a temperature-controlled OPA is also studied to stabilize the whole calibration system.
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Yue, Jian, Anqi Cui, Fei Wang, Lei Han, Jinguo Dai, Xiangyi Sun, Hang Lin, Chunxue Wang, Changming Chen i Daming Zhang. "Design of Monolithic 2D Optical Phased Arrays Heterogeneously Integrated with On-Chip Laser Arrays Based on SOI Photonic Platform". Micromachines 13, nr 12 (30.11.2022): 2117. http://dx.doi.org/10.3390/mi13122117.

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In this work, heterogeneous integration of both two-dimensional (2D) optical phased arrays (OPAs) and on-chip laser arrays based on a silicon photonic platform is proposed. The tunable multi-quantum-well (MQW) laser arrays, active switching/shifting arrays, and grating antenna arrays are used in the OPA module to realize 2D spatial beam scanning. The 2D OPA chip is composed of four main parts: (1) tunable MQW laser array emitting light signals in the range of 1480–1600 nm wavelengths; (2) electro-optic (EO) switch array for selecting the desired signal light from the on-chip laser array; (3) EO phase-shifter array for holding a fixed phase difference for the uniform amplitude of specific optical signal; and (4) Bragg waveguide grating antenna array for controlling beamforming. By optimizing the overall performances of the 2D OPA chip, a large steering range of 88.4° × 18° is realized by tuning both the phase and the wavelength for each antenna. In contrast to the traditional thermo-optic LIDAR chip with an external light source, the overall footprint of the 2D OPA chip can be limited to 8 mm × 3 mm, and the modulation rate can be 2.5 ps. The ultra-compact 2D OPA assembling with on-chip tunable laser arrays using hybrid integration could result in the application of a high-density, high-speed, and high-precision lidar system in the future.
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Nguyen, Anh-Hang, i Hyuk-Kee Sung. "Improving the Performance of Optical Phased Array by Reducing Relative Intensity Noise of Optically Injection-Locked Laser Array". Photonics 9, nr 11 (17.11.2022): 868. http://dx.doi.org/10.3390/photonics9110868.

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Relative intensity noise (RIN) is an important factor that determines the performance of optical phased arrays (OPA) that are configured using semiconductor lasers as light emission sources. This study proposes a method of improving the optical signal-to-noise ratio (OSNR) of an OPA by reducing the RIN and using high coherence of optically injection-locked (OIL) laser arrays. We numerically demonstrated a laser RIN reduction of 22.7 dB by the OIL laser compared to a free-running laser. We achieved an OPA RIN reduction of 13.2 dB by combining the coherent outputs with the uncorrelated noise of 21 OIL lasers, compared to a single OIL laser RIN. Consequently, we demonstrated an OPA OSNR increase of approximately 13.8 dB based on the OIL-based OPA compared to that of the conventional noise-correlated OPA configuration. Additionally, we confirmed the maintenance of OPA OSNR improvement during OPA operations.
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Lei, Yufang, Lingxuan Zhang, Yulong Xue, Yangming Ren, Qihao Zhang, Wenfu Zhang i Xiaochen Sun. "Suppressing grating lobes of large-aperture optical phased array with circular array design". Applied Optics 62, nr 15 (18.05.2023): 4110. http://dx.doi.org/10.1364/ao.488916.

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An optical phased array (OPA), especially a two-dimensional (2D) OPA, suffers from the trade-off among steering range, beam width, and the number of antennas. Aperiodic 2D array designs currently aimed to reduce the number of antennas and reduce grating lobes within a wide range fall short when an aperture approaches millimeter size. A circular OPA design is proposed to address this issue. The circular design substantially reduces the number of antennas while achieving the same wide steering range and narrow beam width of optimized aperiodic 2D OPA designs. Its efficient suppression of grating lobes, the key to a wide steering range with minimal number of antennas and large antenna spacing, is theoretically studied and validated by simulation. The novel, to the best of our knowledge, design allows less than 100 antennas, orders of magnitude reduction, for millimeter size aperture OPA designs. It paves the way for commercialization by significantly reducing control complexity and power consumption.
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Chen, Jingye, Shi Zhao, Wenlei Li, Xiaobin Wang, Xiang’e Han i Yaocheng Shi. "Silicon Optical Phased Array Hybrid Integrated with III–V Laser for Grating Lobe-Free Beam Steering". Photonics 11, nr 10 (10.10.2024): 952. http://dx.doi.org/10.3390/photonics11100952.

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A silicon photonics-based optical phased array (OPA) is promising for realizing solid-state and miniature beam steering. In our work, a 1 × 16 silicon optical phased array (OPA) hybrid integrated with a III–V laser is proposed and demonstrated. The III–V laser chip is vertically coupled with a silicon OPA chip based on a chirped grating coupler with a large bandwidth. The coupling efficiency reaches up to 90% through utilizing the metal reflector underneath the silicon oxide layer. The one-dimensional antenna array comprising silicon waveguides with half-wavelength spacing enables beam steering with none high-order grating lobes in a 180° field of view. The measured beam steering angle of the hybrid integrated OPA chip is ±25°, without grating lobes, and the suppression ratio of the side-lobes is larger than 9.8 dB with phase calibration.
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Wang, Zhicheng, Junbo Feng, Haitang Li, Yuqing Zhang, Yilu Wu, Yuqi Hu, Jiagui Wu i Junbo Yang. "Ultra-Compact and Broadband Nano-Integration Optical Phased Array". Nanomaterials 13, nr 18 (8.09.2023): 2516. http://dx.doi.org/10.3390/nano13182516.

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The on-chip nano-integration of large-scale optical phased arrays (OPAs) is a development trend. However, the current scale of integrated OPAs is not large because of the limitations imposed by the lateral dimensions of beam-splitting structures. Here, we propose an ultra-compact and broadband OPA beam-splitting scheme with a nano-inverse design. We employed a staged design to obtain a T-branch with a wavelength bandwidth of 500 nm (1300–1800 nm) and an insertion loss of −0.2 dB. Owing to the high scalability and width-preserving characteristics, the cascaded T-branch configuration can significantly reduce the lateral dimensions of an OPA, offering a potential solution for the on-chip integration of a large-scale OPA. Based on three-dimensional finite-difference time-domain (3D FDTD) simulations, we demonstrated a 1 × 16 OPA beam-splitter structure composed entirely of inverse-designed elements with a lateral dimension of only 27.3 μm. Additionally, based on the constructed grating couplers, we simulated the range of the diffraction angle θ for the OPA, which varied by 0.6°–41.6° within the wavelength range of 1370–1600 nm.
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Nguyen, Anh-Hang, Jun-Hyung Cho i Hyuk-Kee Sung. "Theoretical Demonstration of Security Improvement of Optical Phased Array Based on Optically Injection-Locked Lasers". Photonics 8, nr 11 (23.10.2021): 469. http://dx.doi.org/10.3390/photonics8110469.

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The high security of optical phased array (OPA) signals is an important requirement for OPA-based optical wireless communication (OWC). We propose a method for improving the security of OPA-based OWC systems using optically injection-locked (OIL) semiconductor lasers. We theoretically demonstrate the amplitude and phase modulation of OIL-OPA elements by controlling the injection-locking parameters of the OIL lasers. When a Taylor window function is applied as the amplitude profile of the OPA transmitter, the sidelobe level decreases by 22 dB and the unsecured distance reduces 10 times compared to the case without the Taylor window function. In addition, the unsecured area factor becomes 0.8%.
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Liu, Qiankun, Daniel Benedikovic, Tom Smy, Ahmad Atieh, Pavel Cheben i Winnie N. Ye. "Circular Optical Phased Arrays with Radial Nano-Antennas". Nanomaterials 12, nr 11 (6.06.2022): 1938. http://dx.doi.org/10.3390/nano12111938.

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On-chip optical phased arrays (OPAs) are the enabling technology for diverse applications, ranging from optical interconnects to metrology and light detection and ranging (LIDAR). To meet the required performance demands, OPAs need to achieve a narrow beam width and wide-angle steering, along with efficient sidelobe suppression. A typical OPA configuration consists of either one-dimensional (1D) linear or two-dimensional (2D) rectangular arrays. However, the presence of grating sidelobes from these array configurations in the far-field pattern limits the aliasing-free beam steering, when the antenna element spacing is larger than half of a wavelength. In this work, we provide numerical analysis for 2D circular OPAs with radially arranged nano-antennas. The circular array geometry is shown to effectively suppress the grating lobes, expand the range for beam steering and obtain narrower beamwidths, while increasing element spacing to about 10 μm. To allow for high coupling efficiency, we propose the use of a central circular grating coupler to feed the designed circular OPA. Leveraging radially positioned nano-antennas and an efficient central grating coupler, our design can yield an aliasing-free azimuthal field of view (FOV) of 360°, while the elevation angle FOV is limited by the far-field beamwidth of the nano-antenna element and its array arrangement. With a main-to-sidelobe contrast ratio of 10 dB, a 110-element OPA offers an elevation FOV of 5° and an angular beamwidth of 1.14°, while an 870-element array provides an elevation FOV up to 20° with an angular beamwidth of 0.35°. Our analysis suggests that the performance of the circular OPAs can be further improved by integrating more elements, achieving larger aliasing-free FOV and narrower beamwidths. Our proposed design paves a new way for the development of on-chip OPAs with large 2D beam steering and high resolutions in communications and LIDAR systems.
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Zhao, Shi, Jingye Chen i Yaocheng Shi. "All-Solid-State Beam Steering via Integrated Optical Phased Array Technology". Micromachines 13, nr 6 (3.06.2022): 894. http://dx.doi.org/10.3390/mi13060894.

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Light detection and ranging (LiDAR), combining traditional radar technology with modern laser technology, has much potential for applications in navigation, mapping, and so on. Benefiting from the superior performance, an all-solid-state beam steering realized by integrated optical phased array (OPA) is one of the key components in the LiDAR system. In this review, we first introduce the basic principle of OPA for beam steering. Then, we briefly review the detailed advances of different solutions such as micro-electromechanical system OPA, liquid crystal OPA, and metasurface OPA, where our main focus was on the recent progress of OPA in photonic integrated chips. Finally, we summarize the different solutions and discuss the challenges and perspectives of all-solid-state beam steering for LiDAR.
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Rozprawy doktorskie na temat "Optical phased array (OPA)"

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Leonard, Cathy Wood. "Optical feeds for phased array antennas". Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80079.

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This thesis investigates optical feed methods for phased array antennas. The technical and practical limitations are analyzed and an optimum design is determined. This optimum optical feed is a two-beam interferometric approach which uses acoustooptic phase control. The theory is derived; a computer model is developed; and the limitations are determined. Design modifications are suggested which reduce limitations and greatly extend the range of applications.
Master of Science
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Weverka, Robert T. "Optical signal processing of phased array radar". Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3207762.

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Kut, King Kan Warren. "Design and characterization of subwavelength grating (SWG) engineered silicon photonics devices fabricated by immersion lithography". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST099.

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La technologie photonique sur silicium s'appuie sur les procédés matures de fabrication de l'industrie du semi-conducteur pour produire des composants opto-électroniques à échelle industrielle. Les métamatériaux à base de réseaux sub-longueur d'onde permettent de contrôler le confinement du mode et la dispersion, et ont ainsi été implémentés pour démontrer des performances de pointe de composants photoniques intégrés. Les effets de diffraction et de réflexions sont supprimés dans les matériaux sub-longueur d'onde. Leurs dimensions sont petites et sont environ de 100 nm. Jusqu'à présent, la majorité des composants sub-longueur d'onde ont été fabriqués par lithographie électronique. Or, cette technique n'est pas compatible avec une production à large échelle. Aujourd'hui, la lithographie à immersion se déploie dans les fonderies photoniques sur silicium. Elle permet de définir des dimensions aussi petites que 70 nm, avec un modèle de correction d'effets optiques de proximité. Le but principal de cette thèse est d'étudier la faisabilité de l'utilisation de la lithographie à immersion avec la correction d'effets optiques de proximité pour la fabrication de composants photoniques sub-longueur d'onde de pointe. Ces composants ont été développés sur des plaques de 300 mm de diamètre au CEA-Leti. Trois composants ont été étudiés, chacun avec une spécificité technologique : i) un diviseur de puissance avec une seule étape de gravure complète, ii) un réseau de couplage puce-fibre alternant des gravures partielles et complètes, et iii) une matrice d'antennes optiques, couvrant une large surface, avec une étape de gravure partielle. Le diviseur de puissance est constitué d'un coupleur par interférométrie multi-mode (MMI) avec des réseaux sub longueur d'onde pour contrôler la dispersion des modes optiques et ainsi pour obtenirune très large bande passante spectrale, qui a été mesurée expérimentalement à 350 nm, et qui en bon accord avec les simulations. La bande passante d'un MMI conventionnel sans structures sub longueur d'onde n'est que de 100 nm environ. Le réseau de couplage puce-fibre s'appuie sur une géométrie en forme de « L », avec des structures sub-longueur d'onde gravés partiellement et complètement, pour augmenter l'efficacité de couplage. Celle-ci a été mesurée à -1.70 dB (68 %) à une longueur d'onde de 1550 nm et représente la meilleure performance pour une telle structure complexe, utilisant une technologie autre que la lithographie électronique. Néanmoins, la valeur mesurée est inférieure à la valeur simulée de 0.80 dB (83 %). Une des raisons principales de cette performance limitée est la sensibilité de cette structure aux erreurs d'alignement entre les deux étapes de gravure pendant la fabrication. L'antenne optique est constituée de structures sub longueur d'onde partiellement gravées pour obtenir une grande surface d'émission de 48 µm×48 µm, réduisant ainsi la divergence du faisceau. Cette antenne a été implémentée comme antenne unitaire dans une matrice 4×4 à réseau phasé avec un pas de 90 µm×90 µm. A une longueur d'onde de 1550 nm, le faisceau émis par l'antenne unitaire a une divergence à mi-hauteur mesurée de 1.40° et celui émis par la matrice d'antennes a une divergence à mi hauteur de 0.25°. Ces valeurs sont en accord avec les valeurs simulées. Ces résultats servent comme preuve de concept de l'implémentation d'une telle antenne dans une matrice à réseau phasé. En résumé, les résultats de cette thèse illustrent le grand potentiel de la lithographie à immersion avec la correction d'effets optiques de proximité pour la fabrication de composants photoniques sub- longueur d'onde, ouvrant ainsi la voie pour la commercialisation de ces derniers
Silicon photonics technology leverages the mature fabrication processes of the semi-conductor industry for the large volume production of opto-electronic devices. Subwavelength grating (SWG) metamaterials enable advanced engineering of mode confinement and dispersion, that have been used to demonstrate state-of-the-art performance of integrated photonic devices. SWGs generally require minimum feature sizes as small as a 100 nm to suppress reflection and diffraction effects. Hitherto, most reported SWG-based devices have been fabricated using electron-beam lithography. However, this technique is not compatible with large volume fabrication, hampering the commercial adoption of SWG-based photonic devices. Currently, immersion lithography is being deployed in silicon photonic foundries, enabling the patterning of features of 70 nm, when used in conjunction with optical proximity correction (OPC) models. The main goal of this PhD is to study the feasibility of immersion lithography and OPC for the realization of high-performance SWG devices. The SWG devices developed here have been fabricated using the OPC models and 300 mm SOI wafer technology at CEA-Leti. Three devices have been considered as case studies, each with a specific technological challenge: i) a power splitter requiring a single full etch step, ii) a fiber-chip grating coupler interleaving full and shallow etch steps, and iii) an optical antenna array covering a large surface area with a shallow etch step. The power splitter is implemented using a SWG-engineered multi-mode interferometer (MMI) coupler. The SWG is used to control the dispersion of the optical modes to achieve an ultrawide operating spectral bandwidth. This device experimentally showed state-of-the-art bandwidth of 350 nm, in good agreement with simulations. Note that the bandwidth of a conventional MMI without SWG is around 100 nm. The fiber-chip coupler relies on an L-shaped geometry with SWG in full and shallow etch steps to maximize the field radiated towards the fiber. The measured coupling efficiency, of - 1.70 dB (68 %) at a wavelength of 1550 nm, is the highest value reported for an L-shaped coupler fabricated without electron-beam lithography. Still, this value differs from the calculated efficiency of 0.80 dB (83 %), and compares to experimental values achieved with fiber-chip grating couplers without SWG (~ -1.50 dB). One of the main reasons for the limited experimental performance is the strong sensitivity of the structure to errors in the alignment between the full and shallow etch steps. The optical antenna uses shallowly etched SWG teeth to minimize the grating strength, allowing the implementation of a large area emission aperture, of 48 × 48 µm, which is required to minimize the beam divergence. A two-dimensional (2D) optical phased array (OPA) with an antenna pitch of 90 µm × 90 µm, comprising 16 antennas was designed and fabricated. The SWG-based unitary antenna has a measured full width at half maximum divergence of 1.40° at a wavelength of 1550 nm, while the beam emitted from the phased array has a divergence of 0.25°, both in very good agreement with expected values. These results serve as a good proof-of-concept demonstration of this novel antenna architecture. In summary, the results shown in this PhD illustrate the great potential of immersion lithography and OPC for harnessing SWG-engineering, paving the way for their commercial adoption. Devices with full or shallow etch steps exhibited excellent performance close to that predicted by simulations. The fiber-chip grating couplers deviated from expected results, probably due to the tight fabrication tolerances associated with the combination of full and shallow etch steps
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Thomas, James A. "Optical phased array beam deflection using lead lanthanum zirconate titanate /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9907669.

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Akhter, Afsana N. (Afsana Nahid) 1975. "Improved performance of a virtually imaged phased array for optical demultiplexing". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80039.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
Includes bibliographical references (p. 66).
by Afsana N. Akhter.
S.B.and M.Eng.
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Yang, Jr-Syu. "Laser/optical fiber phased array generation of ultrasound for quality control of manufacturing processes". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17286.

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Sabouri, S., M. Namdari, S. Hosseini i K. Jamshidi. "Study of an array of grating couplers for wireless optical communications". SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A35123.

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An array of grating couplers is studied to be used for beam steering in a wireless optical communication system. This structure is designed using a rib waveguide with a silicon thickness of 220nm and an etch depth of 70nm using 2μm silica substrate. TE polarized input light with wavelength of 1550nm is coupled into the feed waveguide. The structure is optimized based on the angular coverage, directed power, and beam efficiency of the radiated main beam of an individual grating coupler. The main beam radiated by optimized grating coupler has a beamwidth of 10.3°×30.7°. The designed 1-D array of the fifteen grating couplers provides tunability in the range of around 30 degrees which is required for a point to pint wireless optical communication transmitter.
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Xie, Walter. "Integrated Optical Phased Arrays and Highly Efficient Spot-size Converting Coupler for LIDAR Applications". Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/21114.

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Light detection and ranging (LIDAR) is a currently developing sensing technology that detects objects using light. The next generation of information technologies including autonomous vehicles and AI robotics all require the LIDAR sensing system due to its high resolution for a more accurate sensing than radio detection and ranging (RADAR). Currently, LIDAR systems use a mechanical based beam steering approach where multiple lasers are mounted on a mechanical apparatus which is rotated to steer the beam. The mechanical device is expensive, bulky, and large. The scanning rate of the device is limited to the physical rotation of the rotor, and that the systems fail to capture accurate data when the rotor is stuck. This device will require high maintenance and the mechanical approach makes LIDAR systems not so attractive. The approach of using Silicon-on-Insulator (SOI) based optical phased array (OPA) solves these problems by being cheap to manufacture, small in size and does not require maintenance as it does not have any moveable parts. In this thesis, the design and simulation of the optical phased array are presented. Simulation methods such as finite element method (FEM) and finite-difference time-domain method (FDTD) are used to conduct this study. The thesis demonstrates the need for crosstalk reduction and the detrimental effects it has upon the beam steering mechanism. A near half-wavelength one-dimensional (1-D) OPA antenna which incorporates a superlattice structure design is proposed which overcomes conventional crosstalk problems and offers high resolution broadband beam steering while preserving a small footprint size. The element spacing of 0.8 μm is achieved for the grating OPA and results show that the proposed OPA can steer 130° in the longitudinal axis with a divergence beam width of 2.52° at the main lobe for 33 grating elements. The thesis also describes to improve the fiber-to-chip coupling efficiency.
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Rabb, David J. "The spherical fourier cell and application for true-time delay". The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1197045216.

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Sarkar, Niladri. "MEMS Actuation and Self-Assembly Applied to RF and Optical Devices". Thesis, University of Waterloo, 2004. http://hdl.handle.net/10012/902.

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The focus of this work involves optical and RF (radio frequency) applications of novel microactuation and self-assembly techniques in MEMS (Microelectromechanical systems). The scaling of physical forces into the micro domain is favorably used to design several types of actuators that can provide large forces and large static displacements at low operation voltages. A self-assembly method based on thermally induced localized plastic deformation of microstructures has been developed to obtain truly three-dimensional structures from a planar fabrication process. RF applications include variable discrete components such as capacitors and inductors as well as tunable coupling circuits. Optical applications include scanning micromirrors with large scan angles (>90 degrees), low operation voltages (<10 Volts), and multiple degrees of freedom. One and two-dimensional periodic structures with variable periods and orientations (with respect to an incident wave) are investigated as well, and analyzed using optical phased array concepts. Throughout the research, permanent tuning via plastic deformation and power-off latching techniques are used in order to demonstrate that the optical and RF devices can exhibit zero quiescent power consumption once their geometry is set.
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Książki na temat "Optical phased array (OPA)"

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B, Bhasin K., Hendrickson Brian M, Society of Photo-optical Instrumentation Engineers. i American Academy of Otolaryngology--Head and Neck Surgery Foundation., red. Optoelectronic signal processing for phased-array antennas. Bellingham, Wash., USA: SPIE, 1988.

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United States. National Aeronautics and Space Administration., red. MMIC devices for active phased array antennas: Final report. [Washington, DC?: National Aeronautics and Space Administration, 1986.

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M, Koepf Gerhard, Hendrickson Brian M i Society of Photo-optical Instrumentation Engineers., red. Optoelectronic signal processing for phased-array antennas II: 16-17 January 1990, Los Angeles, California. Bellingham, Wash., USA: SPIE, 1990.

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B, Bhasin K., i Lewis Research Center, red. Optical techniques to feed and control GaAs MMIC modules for phased array antenna applications. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1986.

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M, Hendrickson Brian, i Society of Photo-optical Instrumentation Engineers., red. Optoelectronic signal processing for phased-array antennas IV: 26-27 January 1994, Los Angeles, California. Bellingham, Wash., USA: SPIE, 1994.

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A, Richard M., i Lewis Research Center, red. Optical control of an 8-element Ka-band phased array using a high-speed optoelectronic interconnect. [Cleveland, Ohio: NASA Lewis Research Center, 1990.

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Paul, Casasent David, i Society of Photo-optical Instrumentation Engineers., red. Transition of optical processors into systems 1995: 18 April 1995, Orlando, Florida. Bellingham, Wash: SPIE, 1995.

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Shi-Kay, Yao, Hendrickson Brian M i Society of Photo-optical Instrumentation Engineers., red. Optical technology for microwave applications VI and Optoelectronic signal processing for phased-array antennas III: 20-23 April 1992, Orlando, Florida. Bellingham, Wash., USA: SPIE--the International Society for Optical Engineering, 1992.

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Optical RF distribution links for MMIC phased array antennas. [Washington, DC]: National Aeronautics and Space Administration, 1988.

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Optoelectronic Signal Processing for Phased-Array Antennas Iv/V 2155. Society of Photo Optical, 1994.

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Części książek na temat "Optical phased array (OPA)"

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Wang, Zhiqing, Zhiyu Xiang i Eryun Liu. "Object Guided Beam Steering Algorithm for Optical Phased Array (OPA) LIDAR". W Intelligence Science and Big Data Engineering. Visual Data Engineering, 262–72. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36189-1_22.

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Dong, Tao, Jingwen He i Yue Xu. "Design of Optical Antennas and Arrays". W Photonic Integrated Phased Array Technology, 37–77. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-9919-4_2.

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Zmuda, Henry. "Optical Beamforming for Phased Array Antennas". W Adaptive Antenna Arrays, 219–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05592-2_13.

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Luo, Xiangang. "Radiation Engineering and Optical Phased Array". W Engineering Optics 2.0, 645–90. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5755-8_14.

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Krishnamoorthy, U., K. Li, K. Yu, D. Lee, J. P. Heritage i O. Solgaard. "Dual-Mode micromirrors for Optical Phased Array Applications". W Transducers ’01 Eurosensors XV, 1266–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_298.

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Zhang, Huihui, Qiang Liu, Qiqi Yuan i Qingzhong Huang. "Two-Dimensional Beam Steering in Optical Phased Array with Grating Array Superlattices". W Lecture Notes in Electrical Engineering, 99–105. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4110-4_12.

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Fonte, A., S. Moscato, R. Moro, A. Pallotta, A. Mazzanti, A. Bilato, G. De Filippi i in. "D-band Phased Array Antenna Module for 5G Backhaul". W Key enabling technologies for future wireless, wired, optical and satcom applications, 101–11. New York: River Publishers, 2024. http://dx.doi.org/10.1201/9781003587309-11.

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Lau, Kam Y. "Broadband Microwave Fiber-Optic Links with RF Phase Control for Phased-Array Antennas". W Springer Series in Optical Sciences, 229–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16458-3_23.

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Gagino, Marco, Alonso Millan-Mejia, Erwin Bente i Victor Dolores-Calzadilla. "On-Chip Calibration of an Optical Phased Array Through Chip Facet Reflections". W The 25th European Conference on Integrated Optics, 493–99. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-63378-2_80.

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Manni, Francesco, Paolo Colantonio, Rocco Giofrè, Ernesto Limiti, Patrick Ettore Longhi, Steven Caicedo Mejillones, Stefano Moscato i Alessandro Fonte. "Ka-Band GaN-on-SiC Power Amplifier for High EIRP Satellite Phased Antenna Array". W Key enabling technologies for future wireless, wired, optical and satcom applications, 133–42. New York: River Publishers, 2024. http://dx.doi.org/10.1201/9781003587309-13.

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Streszczenia konferencji na temat "Optical phased array (OPA)"

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Wang, Wuxiucheng, Yongchao Liu, Ming Gong i Hui Wu. "Dual-Mode, Subarray Design for Optical Phased Array With Electro-Optic Phase Shifters". W CLEO: Applications and Technology, JTh2A.188. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jth2a.188.

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We propose a new design optimization method for optical phased arrays with subarrays. The new design enables a low-loss mode for subarrayed OPA operation that offers better trade-offs between power consumption, optical loss, and chip area.
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Liu, Yuan, Chongxin Zhang, Daniel M. DeSantis, Diya Hu, Thomas Meissner, Andres Garcia Coleto, Benjamin Mazur, Jelena Notaros i Jonathan Klamkin. "High-Resolution Arrayed-Waveguide-Grating-Assisted Passive Integrated Optical Phased Array for 2-D Beam Steering". W CLEO: Science and Innovations, STu4N.1. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.stu4n.1.

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A high-resolution 64-channel arrayed-waveguide-grating-assisted silicon-nitride integrated optical phase array is demonstrated for 2-D beam steering. A field of view of 5° ×25° with 0.3° vertical resolution is achieved over a wavelength range of 100 nm with a single optical input. Higher vertical resolution can be attained by utilizing all the inputs of the OPA.
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Wu, Chensheng, Kento Komatsu, Rihoko Tsuchiya, Takuo Tanemura i Yoshiaki Nakano. "Al-Free GaAs Optical Phased Array for Near-Infrared Sensing". W Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cmp11b_04.

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Al-free GaAs/InGaP-based optical phased array (OPA) working at 905-nm wavelength is numerically demonstrated. Using high-mesa waveguides, large-scale OPA with 128 phase shifters can fit inside 1-mm2 footprint generating more than 100 resolvable points.
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Nakai, Makoto, i Isamu Takai. "Beam Steering with Integrated Optical Phased Array using DNN". W JSAP-Optica Joint Symposia. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/jsapo.2023.19p_a310_8.

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Integrated optical-phased-array (OPA) has drawn significant attention due to the potential use in wide range of applications, such as LiDAR (Light Detection and Ranging) and free space communication. Beam emitted from OPA is electronically steerable by controlling the phase of light entering the antenna array [1]. During the fabrication process, the device dimension and waveguide sidewall roughness apt to change within the OPA circuit. This shifts the phase of light entering each antenna, resulting in a phase error. To prevent the distortion of the emitted beam, a look-up table of phase modulation voltage (PM-voltage) is prepared for each beam angle. Another factor which distorts beam is the change of chip temperature, which shifts the refractive index. In an environment which temperature changes rapidly, a look-up table for each angle and temperature will be required, resulting in a massive amount of calibration work. In this work, deep neural network (DNN) is used to predict the PM-voltage which controls the phase modulators to form a desired far field pattern (FFP).
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Wu, Dachuan, Bowen Yu i Yasha Yi. "Phase-Combining Unit for Aliasing Suppression in Optical Phased Array". W Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cfa12e_03.

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We 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.
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Ashtiani, Farshid, i Firooz Aflatouni. "2-D Optical Phased Arrays with Multilayer Antenna Elements and Off-Aperture Phase Control". W CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sth2g.2.

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A single-wavelength multilayer 2-D optical phased array (OPA) architecture with vertically-stacked nanoantennas, 3-D light distribution, and off-aperture phase control is reported. An 8x8 OPA with 3μm element-spacing and 23 beam steering range is demonstrated as a proof of concept.
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Kuo, Pin-Cheng, Sheng-I. Kuo, Ju-Wei Wang, Yin-He Jian, Zohauddin Ahmad, Po-Han Fu, You-Chia Chang i in. "Actively Steerable Integrated Optical Phased Array (OPA) for Optical Wireless Communication (OWC)". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/ofc.2022.m1c.7.

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Kuo, Pin-Cheng, Sheng-I. Kuo, Ju-Wei Wang, Yin-He Jian, Zohauddin Ahmad, Po-Han Fu, You-Chia Chang i in. "Actively Steerable Integrated Optical Phased Array (OPA) for Optical Wireless Communication (OWC)". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/ofc.2022.m1c.7.

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Li, Yingzhi, Baisong Chen, Quanxin Na, Xianshu Luo, Guo-qiang Lo, Qijie Xie i Junfeng Song. "High Data Rate Optical Wireless Communication over Wide Range by Using Nonuniform-space Optical Phased Array". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.w3i.4.

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We demonstrate a high-data-rate optical wireless communication (OWC) system over wide steering range by using a nonuniform-space optical-phased-array (OPA) chip. More than 70 Gb/s data transmission covering 100° steering range over 10 m is achieved.
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Di, Yujie, Caiming Sun, Shuyan Chen, Weiwei Liu, Yizhan Dai, Binghui Li, Wu Shi i in. "Capacity Enhancement of VLC by Blue-green Wavelength Division Multiplexing Using Optical Phased Array". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.m4f.2.

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We proposed and experimentally demonstrated the first blue-green OPA-based WDM-VLC systems with narrow channel spacing. A 4.5-Gbit/s transmission with 50% capacity enhancement was achieved by OCT-precoding and simplified third-order Volterra equalization.
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Raporty organizacyjne na temat "Optical phased array (OPA)"

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Chen, Ray T. Three Dimensionally Interconnected Silicon Nanomembranes for Optical Phased Array (OPA) and Optical True Time Delay (TTD) Applications. Fort Belvoir, VA: Defense Technical Information Center, czerwiec 2012. http://dx.doi.org/10.21236/ada567453.

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Mickelson, Alan R. An Investigation of the Channel Crosstalk in Optical Heterdyne Controlled Phased Array Radars. (Phenomenological Modeling of Optically Assisted Phased Array Radar). Fort Belvoir, VA: Defense Technical Information Center, czerwiec 1996. http://dx.doi.org/10.21236/ada309641.

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Mickelson, Alan R. An Investigation of the Channel Crosstalk in Optical Heterodyne Controlled Phased Array Radars. Fort Belvoir, VA: Defense Technical Information Center, maj 1993. http://dx.doi.org/10.21236/ada265412.

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