Recent experiments have demonstrated the possibility of optically changing the group velocity of an optical pulse as it travels through a material [1-4]. These experiments have shown that it is possible to slow the speed of light up to nearly stopping it [2] and also faster-than-light propagation of the pulse envelope (although not its information) has been demonstrated [3]. The possibility of ...

We investigate electronic mitigation of linear and nonlinear fibre impairments and compare various digital signal processing techniques, including electronic dispersion compensation (EDC), single-channel back-propagation (SC-BP) and backpropagation with multiple channel processing (MC-BP) in a ninechannel 112 Gb/s PM-mQAM (m=4,16) WDM system, for reaches up to 6,320 km. We show that, for a suff...

Control of dispersion in fibre optical waveguides is of critical importance to optical fibre communications systems and more recently for continuum generation from the ultraviolet to the mid-infrared. The wavelength at which the group velocity dispersion crosses zero can be set by varying fibre core diameter or index step. Moreover, sophisticated methods to manipulate higher-order dispersion so...

Thin films play an important role in modern science and technology. With the development of optical fibre communication technology laser technology, thin are used more widely this field. The application film is introduced systematically. communications basically covers a variety conventional films. Based on research background, paper mainly analyses physical properties zinc oxide nano-films dis...

This paper describes two methods aimed at improving dead-reckoning accuracy with fiber optic gyroscopes (FOGs) in mobile robots. The first method is a precision calibration procedure for FOGs, which effectively reduces the ill-effects of non-linearity of the scale-factor and temperature dependency. The second method is the implementation of an indirect feedback Kalman filter that fuses the sens...

C. Michel, S. Tascu, V. Doya, O. Legrand, F. Mortessagne In this paper, we present a non-standard fibre amplifier specially designed to amplify scar modes of a multimode chaotic optical fibre. More precisely, we introduce Ytterbium in the optical fibre as a gain medium localised on the maximum of intensity of the scar modes. After briefly recalling the relevance of a chaotic optical fibre as a ...

Quantum key distribution (QKD) provides an attractive means for securing communications in optical fibre networks. However, deployment of the technology has been hampered by the frequent need for dedicated dark fibres to segregate the very weak quantum signals from conventional traffic. Up until now the coexistence of QKD with data has been limited to bandwidths that are orders of magnitude bel...

In many photonics applications, especially in optical fibre based systems, the state of polarization of light remains so far an elusive uncontrolled variable, which can dramatically affect the performances of that systems and which one would like to control as finely as possible. Here, we experimentally demonstrate light-by-light polarization control via a nonlinear effect occurring in single m...