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Slowing light in optical fibres sees fast progress

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Simple scheme for realizing fast light with low distortion in optical fibers

Luc Thévenaz, Sang Hoon Chin

In a previous paper (Song et al., 2005) we reported the first experimental demonstration of pulse advancement with gain in optical fibers using stimulated Brillouin scattering (SBS). We tested the two methods described above to achieve gain-assisted fast l ...

IEEE2007

Broadcast, relay and feedback in Gaussian channels

Sibi Raj Bhaskaran Pillai

Network information theory explores the fundamental data transport limits over communication networks. Broadcasting and relaying are two natural models arising in communication contexts where multiple users share a common communication medium. Number of re ...

EPFL2007

Atomic broadcast

Nils Richard Ekwall

Within only a couple of generations, the so-called digital revolution has taken the world by storm: today, almost all human beings interact, directly or indirectly, at some point in their life, with a computer system. Computers are present on our desks, co ...

EPFL2007

Zero-gain slow and fast light propagation in an optical fiber

Luc Thévenaz, Sang Hoon Chin

Slow and fast light with null amplification or loss of a light signal is experimentally demonstrated. This novel method for producing zero-gain slow and fast light takes advantage of the great flexibility of stimulated Brillouin scattering in optical fiber ...

2006

Reputation in Self-Organized Communication Systems and Beyond (Invited Paper)

Jean-Yves Le Boudec, Jochen Mundinger

Efficiently handling reputation is important in dealing with free-riding, malicious attacks and random failures in self-organized communication systems. At the same time, work in this context is often found to be relevant in many other disciplines, in part ...

ACM2006

Flexible Slow and Fast Light in Optical Fibers

Luc Thévenaz, Sang Hoon Chin, Kwang-Yong Song

A method to achieve an extremely wide and flexible control of the group velocity in an optical fiber using stimulated Brillouin scattering is presented. Group velocities below 71,000 km/s on one hand, well exceeding the speed of light in vacuum on the othe ...

IEEE2006

Deux applications de processus ponctuels aux réseaux de communication

Patrick Thiran, Olivier Dousse, Xuan Hung Nguyen

This paper (in Frensh) summarizes recent results obtained by using shot noise processes for two applications in communication networks: first, TCP/IP traffic models for backbone networks; and next the study of connectivity under rate constraints in wireles ...

2005

A lower bound to the scaling behavior of sensor networks

Martin Vetterli, Michael Christoph Gastpar

For a class of sensor networks, the task is to monitor an underlying physical phenomenon over space and time through a noisy observation process. The sensors can communicate back to a data collector over a noisy channel. The key parameters in such a se ...

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

Liquid schedule searching strategies for the optimization of collective network communications

Roger Hersch, Emin Gabrielyan

For collective communications, the upper limit of a network's capacity is its liquid throughput. The liquid throughput corresponds to the flow of a liquid in an equivalent network of pipes. However, in communication networks, the aggregate throughput of a ...

CSREA Press, Bogart, GA 30622, United States2004

Min-plus System Theory Applied to Communication Networks

Jean-Yves Le Boudec, Patrick Thiran

Network Calculus is a set of recent developments, which provide a deep insight into flow problems encountered in networking. It can be viewed as the system theory that applies to computer networks. Contrary to traditional system theory, it relies on max-pl ...

2002