en
Scientific article
Open access
English

Direct Measurement of Superluminal Group Velocity and Signal Velocity in an Optical Fiber

Published inPhysical review letters, vol. 93, no. 20
Publication date2004
Abstract

We present an easy way of observing superluminal group velocities using a birefringent optical fiber and other standard devices. In the theoretical analysis, we show that the optical properties of the setup can be described using the notion of "weak value". The experiment shows that the group velocity can indeed exceed c in the fiber; and we report the first direct observation of the so-called "signal velocity", the speed at which information propagates and that cannot exceed c.

Citation (ISO format)
BRUNNER, Nicolas et al. Direct Measurement of Superluminal Group Velocity and Signal Velocity in an Optical Fiber. In: Physical review letters, 2004, vol. 93, n° 20. doi: 10.1103/PhysRevLett.93.203902
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0031-9007
594views
303downloads

Technical informations

Creation05/19/2014 3:40:00 PM
First validation05/19/2014 3:40:00 PM
Update time03/14/2023 9:14:42 PM
Status update03/14/2023 9:14:42 PM
Last indexation01/16/2024 10:41:20 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack