Results 211 to 220 of about 12,540 (264)

Field-programmable logic devices with optical input–output

Applied Optics, 2000
A field-programmable logic device (FPLD) with optical I/O is described. FPLD's with optical I/O can have their functionality specified in the field by means of downloading a control-bit stream and can be used in a wide range of applications, such as optical signal processing, optical image processing, and optical interconnects.
T H, Szymanski, M, Saint-Laurent, V, Tyan, A, Au, B, Supmonchai   +4 more
openaire   +2 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

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

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

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

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
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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

An introduction to optically bistable devices and photonic logic

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1984
Abstract The physical principles of the phenomenon of optical bistability are described and it is shown that a family of devices or ‘optical circuit elements can be realized including memories, logic gates and amplifiers. The current range of materials employed and of properties demonstrated is reviewed: it is concluded that with the ...
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Diode laser based optical logic devices

SPIE Proceedings, 1990
Dispersive optical bistability is reviewed with particular emphasis on trans- mission characteristics, time dependence, cascadability and fan-out capability of bistable diode laser amplifiers. Bistability in inhomogeneously excited diode lasers, gain quenching and polarization bistability are also discussed.
openaire   +1 more source