we solve the coupled mode equations governing the chalcogenide nonlinear fiber bragg gratings (fbgs) numerically, and obtain the bistability characteristics. the characteristics of the chalcogenide nonlinear fbgs such as: switching threshold intensity, bistability interval, on-off switching ratio are studied. the effects of fbg length and its third order nonlinear refractive index on fbg charac...

The switching technique determines how messages are propagated from source to destination, and has a great impact on network performance. Traditional flow control mechanisms such as Wormhole Switching (WS) realize very good performance, but prone to deadlock in the vicinity of faults. While techniques such as adaptive routing can alleviate the problem, it cannot by itself solve the problem. Thi...

Recent advancements in power electronic switches provide effective control and operational stability of grid systems. Junction temperature is a crucial parameter power-switching semiconductor devices, which needs monitoring to facilitate reliable operation thermal electronics circuits ensure performance. Over the years, various junction measurement techniques have been developed, engaging both ...

<p><span>Optical burst switching (OBS) is a transporting network for the optical internet in years ahead vision. As OBS depends on statistical multiplexing, effect of contention resolution main issue to achieve low probability losing burst. Basically, there are different ways resolve contentions networks like wavelength conversion, deflection routing, segmentation and buffering usin...

In this paper, we proposed a photonic packet switching control method by used optical correlator for optical packet label packetswitched networks for next Generation networks. The main advance is rely on using the Optical Code Division Multiplexing (OCDM) code to labeling optical packets based on source routing. Based on OCDM labeling either header modification or any label swapping techniques ...

High switching frequency associated with soft commutation techniques is a new trend in switching converters. Following this trend, the authors present a buck pulsewidth modulation converter, where the dc voltage conversion ratio has a quadratic dependence on duty cycle, providing a large step-down. By introducing two resonant networks, soft switching is attained, providing highly efficient oper...

In this paper an efficient high step-up converter with a coupled- inductor with soft- switching operation is presented. The proposed topology includes a coupled-inductor boost converter for raising the voltage gain. Moreover, a simple auxiliary resonant circuit composed of an auxiliary switch, a clamping diode and a resonant tank (inductor, capacitor), is adopted in this paper. The coupled-indu...