Quantum key distribution and 1 Gbit/s data encryption over a single fibre

We perform quantum key distribution (QKD) in the presence of 4 classical channels in a C-band dense wavelength division multiplexing (DWDM) configuration using a commercial QKD system. The classical channels are used for key distillation and 1 Gbps encrypted communication, rendering the entire system independent from any other communication channel than a single dedicated fibre. We successfully distil secret keys over fibre spans of up to 50 km. The separation between quantum channel and nearest classical channel is only 200 GHz, while the classical channels are all separated by 100 GHz. In addition to that we discuss possible improvements and alternative configurations, for instance whether it is advantageous to choose the quantum channel at 1310 nm or to opt for a pure C-band configuration.Comment: 9 pages, 7 figure

Novel optical pulse width management device

A novel optical pulse width management device is proposed and demonstrated. The device requires very slow switching energy, on the order of a few tens of femto-joules. It can perform stretching of a RZ to a much broader pulse, and conversion of RZ data streams to NRZ format for bit rates greater than 20 Gbit/s

Demonstration of highly scalable 100Gbit/s OTDM computer interconnect with rapid interchannel switching capability

An experimental demonstration of an error free 100Gbit/s optical time division multiplexing (OTDM) broadcast star multiprocessor interconnect is presented. A highly scalable novel node design provides rapid interchannel switching capability of the order of the single channel bit period (1.6ns)

Reversed-phase high performance liquid chromatographic separation of nitrosamines: The use of the overlapping resolution mapping technique for the optimization of solvent compositions

10.1007/BF02267935Chromatographia359-12671-674CHRG

Retention prediction of substituted phenols in reversed-phase HPLC

10.1007/BF02324824Chromatographia256515-519CHRG

Analysis of world terror networks from the reduced Google matrix of Wikipedia

9 pages, 5 figs, 2 tables, more data at http://www.quantware.ups-tlse.fr/QWLIB/wikiterrornetworks/International audienceWe apply the reduced Google matrix method to analyse interactions between 95 terrorist groups and determine their relationships and influence on 64 world countries. This is done on the basis of the Google matrix of the English Wikipedia (2017) composed of 5416537 articles which accumulate a great part of global human knowledge. The reduced Google matrix takes into account the direct and hidden links between a selection of 159 nodes (articles) appearing due to all paths of a random surfer moving over the whole network. As a result we obtain the network structure of terrorist groups and their relations with selected countries. Using the sensitivity of PageRank to a weight variation of specific links we determine the geopolitical sensitivity and influence of specific terrorist groups on world countries. We argue that this approach can find useful application for more extensive and detailed data bases analysis