Results 251 to 260 of about 5,815,790 (304)

Efficient optical waveguide coupler

Applied Optics, 1980
A new method for high-efficiency interconnection of two planar optical waveguides is described. This technique is based on mode-matched coupling and is particularly useful when the difference between the refractive indices of the individual guides is large.
B L, Sopori, C M, Phillips, W S, Chang
openaire   +2 more sources

Efficient routing in optical networks

Journal of the ACM, 1996
This paper studies the problem of dedicating routes to connections in optical networks. In optical networks, the vast bandwidth available in an optical fiber is utilized by partitioning it into several channels, each at a different optical wavelength.
Alok Aggarwal, Amotz Bar-Noy, Don Coppersmith, Rajiv Ramaswami, Baruch Schieber, Madhu Sudan 0001   +5 more
openaire   +1 more source

Spectrally Efficient Optical Communications

Asia Communications and Photonics Conference 2015, 2015
The paper reviews most diffuse techniques used for increasing spectral efficiency in optical communication, considering different network segments. Time-frequency packing will be described, and compared to Nyquist wavelength-division multiplexing and orthogonal frequency-division multiplexing.
POTI', LUCA, MELONI, GIANLUCA, FRESI, Francesco, MALACARNE, Antonio   +3 more
openaire   +2 more sources

Efficient linear optics quantum computation

Quantum Information and Computation, 2001
Two qubit gates for photons are generally thought to require exotic materials with huge optical nonlinearities. We show here that, if we accept two qubit gates that only work conditionally, single photon sources, passive linear optics and particle detectors are sufficient for implementing reliable quantum algorithms. The conditional nature of the gates
Milburn, G. J., Ralph, T. C., White, A. G., Knill, E, Laflamme, R   +4 more
openaire   +4 more sources

Multiflow optical transponder for efficient multilayer optical networking

IEEE Communications Magazine, 2012
Growing concerns regarding the scalability of current optical networks as well as IP-based networks are driving two important trends. One trend is a shift from the current rigid optical networks to spectrally efficient elastic optical networks with a flexible bandwidth and adaptive channel spacing.
Masahiko Jinno, Hidehiko Takara, Yoshiaki Sone, Kazushige Yonenaga, Akira Hirano   +4 more
openaire   +2 more sources

High efficiency optical diplexers

Applied Optics, 1982
This paper describes various interferometric optical circuits that could provide highly efficient combining of local oscillator and signal beams in heterodyne mixers. Already in use at millimeter wavelengths, they will be of particular importance in optical systems where the available local oscillator power is low.
openaire   +2 more sources

Efficient broadband composite optical isolator

Applied Optics, 2013
A new design of a broadband optical isolator, composed as a sequence of ordinary Faraday rotators and achromatic quarter-wave plates (QWPs), is presented. In particular, we demonstrate that by using four Faraday rotators and six achromatic QWPs, rotated at specific angles, optical isolation better than 15 dB over the range from 700 to 1000 nm can be ...
E. St. Dimova, D. Comparat, G. St. Popkirov, A. A. Rangelov, N. V. Vitanov   +4 more
openaire   +3 more sources

Energy efficiency of hybrid optical switching

2012 14th International Conference on Transparent Optical Networks (ICTON), 2012
Hybrid optical switching (HOS) has the potential to provide highly efficient operation through combining various switching paradigms and different implementation options within the same network. The flexibility of choosing between circuit, packet or burst switching and electronic or optical implementation results in an improvement in both energy and ...
S. Aleksic, M. Fiorani, CASONI, Maurizio
openaire   +1 more source

Efficiency in Optical Testing of Large Optics

Optical Fabrication and Testing Workshop, 1992
Itek Optical Systems is a leader in the production of large optics. This paper describes the process optimization used by Itek to generate a highly efficient and cost effective optical test system for high volume large optics.
openaire   +1 more source