for an indoor non-directed line of sight optical wireless communication (nlos-owc) system we investigate the optimized lambertian order (olo) of light-emitting diodes (leds). we firstly derive an expression for the olo from a conventional lambertian led model. then, we analyze the indoor multi-cell nlos-owc channel characteristics including the optical power distribution and the multipath time ...

The next major performance plateau for high-speed, long-haul networks is at 10 Gbps. Data visualization, high performance network storage, and Massively Parallel Processing (MPP) demand these (and higher) communication rates. MPP-to-MPP distributed processing applications and MPP-to-Network File Store applications already require single conversation communication rates in the range of 10 to 100...

the testing equipment and the methods of field tests used for calculating the modulus of deformation and elasticity of the shah _ abass dam foundation rock are described here. the communication includes conclusions of which a sharp difference between the quality of the roc kin the right and in the left bank is the most important.

A blue array of GaN-based μLEDs and a Golden Dragon Plus commercial LED (OSRAM) were analysed under a pulsed current. A LabVIEW program by National InstrumentsTM is used to automate the measurements of the envelope at the top of the pulse at different frequencies. The program allows to save, to plot and to elaborate the data measured. The results, characterised by noise at high frequencies, sho...

We describe a comparative analysis of the power consumption of optical cross-connect (OXC) equipment based on electrical and/or photonic matrix switching, which will be used for future large-capacity optical networks. The switch configurations used for both types of OXCs are also comprehensively discussed. For optical networks that accommodate traffic with a capacity of several Tb/s, the power ...

In the past, the outside plant (OSP) to equipment fiber ratio was about two to one, or two OSP fiber terminations in the CO to every one equipment fiber termination. The focus for access and connections was primarily on the front of the optical distribution frame line-up. There was very little electronic equipment with optical interface – usually the last piece of equipment before the signal ex...

while the application of optical and photonic technologies in the communications, computing, medicine and industrial manufacturing has been growing rapidly, the miniaturization of these technologies has been slow due to the limitation on the diffraction. however, the developments of nanoscale components and guiding methods are continuing with a rapid pace. since waveguiding is a fundamental iss...

NTT Laboratories have focused on finding a radical solution to the problem of high power consumption and heat generation in ICT equipment by reducing the power consumption of microprocessors (MPU). This is because MPUs consume most of the power in this equipment. In this context, NTT Laboratories have developed optical data transmission technologies for off-chip and on-chip optical interconnect...