Most studies addressing translucent network design targeted a tradeoff between minimizing the number of deployed regenerators and minimizing the number of regeneration sites. The latter highly depends on the carrier’s strategy and is motivated by various considerations such as power consumption, maintenance and supervision costs. However, concentrating regenerators into a small number of nodes ...

In this study we introduce the regenerator location problem in flexible optical networks (RLP-FON). With a given traffic demand, RLP-FON tries to solve the regenerator placement, routing, bandwidth allocation and modulation selection problems jointly to satisfy data transfer demands with the minimum number of regenerators. We propose a novel branch and price algorithm for this challenging probl...

In this paper we compare the performance of opaque and translucent Optical Transport Networks (OTNs) taking into account different regenerator placement strategies. The translucent approach achieves noticeable results under static traffic in terms of saving of deployed resources. On the other hand in the dynamic scenario a translucent OTN suffers from fewer resources and may display high blocki...

We propose a modification of a NALM-based 2R regenerator of phase-encoded signals which operates at considerably lower input powers than was studied earlier. Our modification consists of replacing the core-matched and lossless fiber coupler in the NALM by a coupler with a propagation constant mismatch and loss asymmetrically distributed between the two cores. The performance of the modified reg...

Regenerator allocation consists on selecting which of the already installed regenerators in a translucent network may be used according to the dynamic traffic requests in order to maximize the quality of the optical signal while minimizing the opaqueness of the network. A recent study has shown that the performance of the regenerator allocation techniques strongly depends on the accuracy of the...

The regenerator glass-ceramic is produced as a honeycomb product for a turbine engine heat exchanger. It is made from a powdered glass frit, which as a slurry can impregnate paper that is wound as alternately corrugated sheets on a wheel. After firing, a porous ceramic regenerator wheel is produced that allows energy to be transferred from hot exhaust gases to the cold intake air in the turbine...

OBJECTIVE Patients with diabetic neuropathy (DN) demonstrate variable degrees of nerve regeneration and degeneration. Our aim was to identify risk factors associated with sural nerve degeneration in patients with DN. RESEARCH DESIGN AND METHODS Demographic, anthropometric, biochemical, and anatomical data of subjects with DN from a 52-week trial of acetyl-L-carnitine were retrospectively exam...

Introduction A number of experimental realizations of thermo-acoustic engines that use an acoustic loop to feed energy back to a regenerator have been reported, mostly of the Thermo-Acoustic Stirling Heat Engine (TASHE) type. An alternative configuration is the simple wavelength loop with the linear alternator in a short side-branch, but with close to travelling-wave phasing on both sides of it...

We propose the design of an all-optical 2R regenerator capable of handling multiple wavelength-division-multiplexed channels simultaneously. It extends the known concept of off-center filtering of self-phase-modulation-broadened signal spectra. The novel feature of the proposed device is a dispersion map that strongly suppresses interchannel impairments. The map employs several sections of nonl...