Results 11 to 20 of about 7,914 (285)
Scalable and ultralow power silicon photonic two-dimensional phased array
APL Photonics, 2023 Photonic integrated circuit based optical phased arrays (PIC-OPAs) are emerging as promising programmable processors and spatial light modulators, combining the best of planar and free-space optics.
Michelle Chalupnik +4 more
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Coherent Beam Combining Using an Internally Sensed Optical Phased Array of Frequency-Offset Phase Locked Lasers [PDF]
Photonics, 2020 Coherent beam combining can be used to scale optical power and enable mechanism-free beam steering using an optical phased array. Coherently combining multiple free-running lasers in a leader-follower laser configuration is challenging due to the need to
Lyle E. Roberts +3 more
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Multi focus acoustic field generation using Dammann gratings for phased array transducers
Results in PhysicsPhased array transducers can shape acoustic fields for versatile manipulation; however, generating multiple focal points typically involves complex optimization.
Tatsuki Fushimi, Yusuke Koroyasu
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Free-Space Applications of Silicon Photonics: A Review
Micromachines, 2022 Silicon photonics has recently expanded its applications to delivering free-space emissions for detecting or manipulating external objects. The most notable example is the silicon optical phased array, which can steer a free-space beam to achieve a chip ...
Chung-Yu Hsu +2 more
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IEEE Open Journal of Antennas and Propagation, 2020 We propose a 1D beam steering high gain hybrid reflector-phased array antenna system for enhanced data rate wireless communication at Ku-band (12 - 14 GHz). The proposed hybrid antenna system consists of a D = 50 cm offset parabolic-cylindrical reflector
Ghanshyam Mishra +3 more
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Planar Array Failed Element(s) Radiation Pattern Correction: A Comparison
Applied Sciences, 2021 Phased arrays are widely used in different fields, such as broadcasting, radar, optics, and space communications. The principle of phased arrays is to generate a directed signal from a large number of antennas to be steered at any desired angle.
Navaamsini Boopalan +3 more
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Phase Calibration of On-Chip Optical Phased Arrays via Interference Technique
IEEE Photonics Journal, 2020 Optical phased arrays (OPAs) are promising in various applications owing to their excellent beam steering performance but suffer from the random initial phases ruining the beam patterns. In this work, an interference-based calibration method to align the
Haiyang Zhang +3 more
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Energy-efficient integrated silicon optical phased array
Frontiers of Optoelectronics, 2023 An optical phased array (OPA) is a promising non-mechanical technique for beam steering in solid-state light detection and ranging systems. The performance of the OPA largely depends on the phase shifter, which affects power consumption, insertion loss ...
Huaqing Qiu +5 more
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State-of-the-Art Passive Beam-Steering Antenna Technologies: Challenges and Capabilities
IEEE Access, 2023 This article reviews the latest developments of beam steering antennas that are entirely passive to realize interference-free, power-efficient, and highly secured end-to-end wireless communication.
Foez Ahmed +2 more
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Comparison of beam combiners for a synthetic aperture imaging telescope [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 Future astronomical space missions will comprise a constellation of several optical telescopes to detect exo-planets by interferometric nulling of starlight.
van der Avoort Casper +3 more
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