Results 191 to 200 of about 431,360 (249)

All-optical logic devices with cascaded nonlinear couplers

Applied Optics, 2000
The switching behaviors of cascaded nonlinear couplers were investigated. They have nearly ideal digital-switching characteristics, and their output power levels can be adjusted by means of varying the nonlinear coupling coefficient of the final coupler.
Wang, Y., Wang, Z., Bialkowski, M. E.
openaire   +4 more sources

Diffusion-Assisted Optical Switch: A New Optical Logic Device

Photonic Switching, 1989
Theoretical and experimental results from a new optical logic device are presented which indicate that it has speeds of many GHz, sub 100 femtojoule energies, and is easily fabricatable.
Theodore Sizer, Gabriela Livescu, Jack Cunningham, David A. B. Miller   +3 more
openaire   +1 more source

Theory of All-Optical GaAs Logic Devices

Topical Meeting on Optical Computing, 1987
All-optical semiconductor devices are numerically modeled and optimized using a microscopic theory for the optical nonlinearities of room-temperature GaAs. Single-frequency NOR-gate operation in reflection is predicted.
M.E. Warren, S.W. Koch, H.M. Gibbs
openaire   +1 more source

Optical logic with variable-grating-mode liquid-crystal devices

Optics Letters, 1980
A liquid-crystal device that performs a two-dimensional intensity-to-spatial-frequency conversion has been investigated for use as an optical transducer. When such a device is used as the input transducer in an optical filtering arrangement, image-intensity levels can be easily manipulated by using appropriate Fourier plane filters.
P, Chavel, A A, Sawchuk, T C, Strand, A R, Tanguay, B H, Soffer   +4 more
openaire   +2 more sources

New optical logic device based on optoelectronics

Annual Meeting Optical Society of America, 1987
A new type optical logic device—an optical XOR gate and a clocked optical R-S flip-flop—has been successfully demonstrated using light-emitting diodes (LEDs) and photodiodes (PDs).
Yan Shi, Kai-De Zha, Yi-Li Guo
openaire   +1 more source

Rate-equation model for optical logic devices

Integrated Photonics Research, 1990
The effects of saturable gain and saturable absorption have been of interest for optical logic devices because of potential switching times of the order of a few picosecond. Through saturable gain, a semiconductor laser is used to pump a second laser, stimulation emission that will not be captured into the lasing mode of the latter.
J. A. Priest, C. L Balestra, B. G. Clay, M. S. Zediker   +3 more
openaire   +1 more source

Optical and Electrical Logic Operations by a Liquid Crystal Bistable Optical Device

Japanese Journal of Applied Physics, 1990
A liquid crystal bistable optical device (LCBOD) with internal optical feedback is prepared using a twisted nematic (TN) liquid crystal cell, a photoconductive (CdS) cell and a polarizing film. Its picture elements are arranged in a 3×5 matrix structure, and the bistable properties are measured as a function of optical input and electrical input ...
Toshiaki Nose, Susumu Sato
openaire   +1 more source

Polarization-based all-optical logic gates using diffractive neural networks

Journal of Optics
Optical logic operations are an essential part of optical computing. The inherent stability and low susceptibility of polarization to the external environment make it a suitable choice for acting as the logical state in computational tasks.
Xiaohong Lin, Kuo Zhang, Kun Liao, Haiqi Huang, Yulan Fu, Xinping Zhang, Shuai Feng, Xiaoyong Hu   +7 more
semanticscholar   +1 more source

Optical Parallel Logic Device Using Liquid Crystal

SPIE Proceedings, 1989
ABSTRACT Optical parallel logic device using twisted nematic liquid crystal cells doped with dichroic dyes and dichroic filters are proposed. Operation of this device is expressed by combination of transfer functions of simple 2X2 matrices. This device can perform several logic operations simultaneously by different wavelength and/or polarized lights ...
Tatsuo Uchida, Kazuhiko Tadokoro
openaire   +1 more source

Anti-Interference All-Optical Logic Computing Based on a 2D Polarization-Sensitive Photodiode.

Nano letters (Print)
Optical logic operation is promising for ultrafast information processing and optical computing due to the high computation speed and low power consumption. However, conventional optical logic devices require either a complex structure and circuit design
Xueping Li, Xiaojie Tang, Peize Yuan, Siqi Qiu, Yurong Jiang, Xiaohui Song, Yali Yu, Congxin Xia, Zhongming Wei   +8 more
semanticscholar   +1 more source