Results 121 to 130 of about 4,667 (157)

Millimeter-Long Optical Antenna for Optical Phased Array

14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020), 2020
We propose to place subwavelength segments in the evanescent field region of strip waveguide to reduce grating strength. Millimeter-long grating is designed which is essential to the implementation of large aperture optical phased arrays.
Jiaxin Chen, Wanxin Li, Jiajun Tian, Yunxu Sun, Yong Yao, Xiaochuan Xu   +5 more
openaire   +1 more source

Fiber-optic feed for phased array antennas

Conference on Lasers and Electro-Optics, 1986
A phased array antenna usually consists of a set of nearly identical elemental antennas positioned in an aperture to provide Nyquist spatial sampling for some angular field of view normal to that aperture. The phase of each element is controlled so that the far-field pattern from the array, the 2-D Fourier transform of the aperture field distribution ...
D. Stillwell, L. Goldberg, M. Parent, D. Czaplak, G. Sherman, J. Weller, W. Collins   +6 more
openaire   +1 more source

Array interconnection by phase-coded optical correlation

Optics Letters, 1990
We present an algorithm for optical interconnection of two-dimensional arrays by transmitting the input through a phase-code mask then correlating it with a control image constructed from the interconnection weights. An arbitrary complex-weighted interconnection pattern can be encoded.
J E, Ford, Y, Fainman, S H, Lee
openaire   +2 more sources

Silicon Optical-Phased-Array Prototypes Using Electro-Optical Phase Shifters

Conference on Lasers and Electro-Optics, 2017
High-speed silicon optical-phased-array (OPA) prototypes are achieved using electro-optical phase shifters with quick response (4.2 ns) and small footprint (500 μm / 2π). 11.1° (1D) and 7.4° × 3.7° (2D) beam steering is observed.
Che Zhao, Haiyang Zhang, Zhong Zheng, Chao Peng, Weiwei Hu   +4 more
openaire   +1 more source

Electro-Optical Scanner Using Phased Array Optical Systems

Advances in Optical Imaging and Photon Migration, 1996
The problem of obtaining the precise localization of a hidden absorber in a highly scattering medium of large dimension has confronted the scientific community for a number of years. Optical methods can also use contrast agents and can identify a line from the tissue surface, including the localized contrast agent and hence the tumor.
Shuoming Zhou, Chunhua Xie, Shiyin Zhao, Hanli Liu, Libo He, Shoko Nioka, Britton Chance   +6 more
openaire   +1 more source

Optically controlled phased array technology

Optical Society of America Annual Meeting, 1990
This paper will discuss the status of photonics technology utilized in implementing a phased array antenna system by optical means. Systems issues and applications which highlight the advantages of optics in the design and implementation of phased arrays will be discussed.
openaire   +1 more source

Reprogrammable Optical Phased Array Switching

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference, 2008
A novel reprogrammable optical phase array (ROPA) device is presented as a reconfigurable electro-optic element. One specific application of the ROPA, a 1:6 electro-optic space switch, is fully described.
openaire   +1 more source

Phased-array optical scanning

Applied Optics, 1979
J L, Hughes, A K, Ghatak
openaire   +2 more sources

High-Performance Flexible Microneedle Array as a Low-Impedance Surface Biopotential Dry Electrode for Wearable Electrophysiological Recording and Polysomnography

Nano-Micro Letters, 2022
Zhihong Li
exaly  

A crossbar array of magnetoresistive memory devices for in-memory computing

Nature, 2022
Seungchul Jung, Sungmeen Myung, Hyunsoo Kim   +2 more
exaly