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Communications optiques en espace libre

Publications associées (167)

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Modeling and performance analysis of IP access interface in optical packet switched networks

The article analyzes the influence of the IP access interface on the packet loss probability and delay times in the optical packet switched network. The network and node model have been proposed, and the assembler and hold features have been included in th ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2004

Wavelength dependent optical force on elliptical silver cylinders at plasmon resonance

Hans Peter Herzig

We use rigorous diffraction theory to analyze the force on elliptical cylinders made from silver as a function of the elongation. We find that, when the wires are illuminated at the plasmon wavelength and placed in a highly focused Gaussian beam, they are ...

2004

Performance and Scalability of EJB Applications

Willy Zwaenepoel, Emmanuel Cecchet

We investigate the combined effect of application implementation method, container design, and efficiency of communication layers on the performance scalability of J2EE application servers by detailed measurement and profiling of an auction site server. We ...

2002

Micromachined photoplastic probe for scanning near-field optical microscopy

Nico de Rooij, Wilfried Noell, Peter Vettiger, Grégoire Genolet, Maria-Pilar Bernal

We present a hybrid probe for scanning near-field optical microscopy (SNOM), which consists of a micromachined photoplastic tip with a metallic aperture at the apex that is attached to an optical fiber, thus combining the advantages of optical fiber probes ...

2001

High resolution Standard Proximity Sensor (HRSPS)

This paper presents the final results of the performances of the High resolution Standard Proximity Sensor developed under a GSTP contract for ESA /ESTEC. The HRSPS is a general purpose displacement measuring system developed with the aim to replace the mu ...

European Space Agency2001

Trace gas measurement using IR laser diodes

Luc Thévenaz, Philippe Robert

The properties of semiconductor laser diodes for trace gas measurements are reviewed. First, the modulation characteristics of these lasers are discussed. Then, two sensitive spectroscopic methods using a frequency-modulated near-IR laser are presented and ...

2000

Fault Localization at the WDM layer

Jean-Yves Le Boudec, Patrick Thiran, Carmen Mas

A single failure in a communication network may trigger many alarms. When the communication network uses optical fibres as transmission medium and increases its capacity by using Wavelength Division Multiplexing (WDM), the number of alarms and the difficul ...

1999

An Alarm Filtering Algorithm For Optical Communication Networks

Jean-Yves Le Boudec, Carmen Mas

A single failure in a communication network can trigger many alarms. We propose an alarm filtering algorithm for the management of an optical network using Wavelength Division Multiplexing (WDM). The algorithm supports: (i) multiple failures and (ii) passi ...

1997

An Alarm Filtering Algorithm for Optical Communication Networks

Jean-Yves Le Boudec, Carmen Mas

1997

Improved design for fast modulating IR sources

Philippe Renaud

The simulation and characterization of a low-cost IR source are described. The IR emission is obtained from heated thin film resistors which are either self- suspended or deposited an a membrane, The simulation, performed with a finite difference method, s ...

1997