Results 251 to 260 of about 463,519 (308)

Optical doughnut for optical tweezers

Optics Letters, 2003
We describe novel optical doughnuts for optical tweezers. With new phase functions, the proposed doughnut beams have dark cores in specified shapes. The technique can offer a simple method for creating a variety of beam shapes to match the trapped objects.
D W, Zhang, X C, Yuan
openaire   +2 more sources

Optically tunable optical filter

Applied Optics, 1995
We experimentally demonstrate an optically tunable optical filter that uses photorefractive barium titanate. With our filter we implement a spectrum analyzer at 632.8 nm with a resolution of 1.2 nm. We simulate a wavelength-division multiplexing system by separating two semiconductor laser diodes, at 1560 nm and 1578 nm, with the same filter.
R T, James, C, Wah, K, Iizuka, H, Shimotahira   +3 more
openaire   +2 more sources

Optical disks in optical computing

COMPCON Spring '91 Digest of Papers, 2002
Two optical-disk based architectures are described. The first is an optical implementation of the radial basis function approach for handwritten character recognition. The second system is an optoelectronic neural network implementation with electronic neurons, electronic synapses, and optical-disk-based weight storage.
Mark A. Neifeld, Alan A. Yamamura, Subrata Rakshit, Seiji Kobayashi, Demetri Psaltis   +4 more
openaire   +1 more source

The logic of optics and the optics of logic

Information Sciences, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
H. John Caulfield, Jonathan Westphal
openaire   +1 more source

A novel optical waveguide for integrated optics

IEEE Journal of Quantum Electronics, 1973
A novel dielectric optical waveguide was made consisting of a guide pattern on a thin dielectric film. Almost all the power propagates in the thin film along the guide pattern. The existence of propagation modes of this waveguide was verified both theoretically and experimentally.
H, Furuta, H, Noda, A, Ihaya
openaire   +2 more sources

Optics and Optical Instruments

American Journal of Physics, 1961
By B. K. Johnson New Tork: Dover Publications Inc. London: Constable & Co. Pp. viii + 224. Price $1.65. This book is an unaltered republication under a new title of the second (1947) edition of the author's Practical Optics. It is difficult to see why the title has been changed; this is a practical handbook which might appeal most to amateurs or to ...
B. K. Johnson, Charles Williamson
openaire   +2 more sources

Optical fibers for optical networking

Bell Labs Technical Journal, 2002
This paper describes the influence of optical networking on the design of optical fibers. It reviews fundamental optical properties, describes the various fiber types, discusses the fiber requirements for optical networking, and considers the effects of fiber nonlinearities. Finally, the paper describes three new optical fibers from Lucent Technologies
openaire   +1 more source