Research on an Adaptive Coupling Technique for Spatially Scattered Light [PDF]
SensorsFocusing on the problems of difficult alignment and low efficiency when coupling the spatially scattered light from 532 nm underwater LiDAR to a single-mode fiber, this paper presents an analysis and simulation of the coupling principle of spatially ...
Xin Liu +6 more
doaj +2 more sources
High-Efficiency, Wide Working Bandwidth Antenna Based on SOI Platform for Optical Phased Array
Micromachines, 2021 A novel structure of a subwavelength surface optical antenna for optical phased array is proposed in this paper. An asymmetric vertical grating structure is applied to achieve high emission efficiency (73% at 1550 nm).
Zihao Wang +5 more
doaj +3 more sources
Efficient Pattern Modeling Method for Parabolic Cylindrical Antennas Incorporating Multi-Source Structural Errors [PDF]
SensorsParabolic cylindrical antennas are characterized by their structural simplicity, high radiation efficiency, and low manufacturing costs. Consequently, they are widely used in Earth observation and serve as a viable option for spaceborne Synthetic ...
Shiyue Xue +3 more
doaj +2 more sources
Beam Tilt Aberration Detection of the Seven-Unit Phased Fiber Laser Array [PDF]
MicromachinesIn this paper, we present a method based on the conjugate image principle and micro-nano optics to detect tilt aberrations of a phased fiber laser array system.
Xin Yu +8 more
doaj +2 more sources
Generation of spatiotemporal acoustic vortices with arbitrarily oriented orbital angular momentum [PDF]
Nature CommunicationsDespite extensive exploration of acoustic vortices carrying orbital angular momentum (OAM), the generation of acoustic vortices with OAM orientations beyond the conventional longitudinal direction remains largely unexplored. Spatiotemporal (ST) vortices,
Shuai Liu +6 more
doaj +2 more sources
Optically Synchronized Phased Arrays in CMOS [PDF]
IEEE Journal of Solid-State Circuits, 2022 Optical synchronization of large-span arrays offers significant benefits over electrical methods in terms of the weight, cost, power dissipation, and complexity of the clock distribution network. This work presents the analysis and design of the first phased array transmitter synchronized using a fully monolithic CMOS optical receiver. We demonstrate a
Matan Gal-Katziri +3 more
openaire +2 more sources
A Phased Array Antenna with New Elements Designed Using Source Transformations
Applied Sciences, 2021 Transformation electromagnetics/optics (TE/TO) has been shown to be a useful technique in designing electromagnetic devices with very unique properties. Here, the concepts of transformation optics for single elements is extended to an array of “pinwheel”
Dipankar Mitra +6 more
doaj +1 more source
Micromachines, 2023 LiDAR has attracted increasing attention because of its strong anti-interference ability and high resolution. Traditional LiDAR systems rely on discrete components and face the challenges of high cost, large volume, and complex construction.
Yufang Lei +5 more
doaj +1 more source
Fast and deterministic optical phased array calibration via pointwise optimisation
Light: Advanced Manufacturing, 2023 Owing to the structural errors in the optical phased array, an initial random phase reduces the quality of the deflection beam. The most commonly applied approach to phase calibration is based on adaptive optics. However, adaptive optimisation approaches
Jingwen Shan +4 more
doaj +1 more source
A Design Method of Optical Phased Array With Insufficient Phase Tuning Range
IEEE Photonics Journal, 2020 Optical phased array (OPA) can achieve beam steering by controlling the phase distribution of each channel. In traditional OPA, 2π phase tuning range is required to achieve beam steering.
Bo Yang +3 more
doaj +1 more source