o accommodate the exponential growth of the Internet, transport networks based on wavelength-division multi-plexing (WDM) technology [1] are increasingly being deployed in carrier networks. WDM technology harnesses the enormous bandwidth of the fiber (potentially tens of terabits per second) by multiplexing hundreds of optical channels, each of which operates at speeds of several gigabits per s...

In this article two matching algorithms for optical switches are presented. First, Permanent algorithm, base on regular matching with one main arbiter. Second algorithm based on random selection of outputs. These algorithms were compared for Bernoulli traffic distribution models. Simulation for mentioned models have been carried out for switches of capacity 8x8, 16x16, 32x32. The results are co...

The advancement of communication technology and growth of internet traffic have continuously driven the fast evolution of networks. Compared to the traditional optoelectronic switch, all-optical switch provides high throughput, rich routing functionalities, and excellent flexibility for rapid signal exchange in fiber optical network. Among various all-optical switches, thermal actuated ring swi...

ABSTRACT Recently, optical ATM switches, composed of optical switches, fiber delay lines and other devices, have been proposed by researchers world-wide as a way of overcoming the EMI, pinout and interconnection problems that would be encountered in future large electronic switch cores. Attaining the size of buffers (buffer depth) in optical ATM fabrics that would be required in practice is a m...

This paper introduces a new concept by which it is possible to design and implement arithmetic processors using permutation networks. To demonstrate this concept, several optoelectronic arithmetic units combining optical directional coupler switches and cyclic permutation networks are designed. The designs show that addition, subtraction, and multiplication can all be performed in O(log n) time...

Magneto-optic devices are a potential enabler of better scaling, transparent networks that are bit-rate, protocol and format insensitive. Transparency is critical given the paradigm shift from connection-oriented communications to IP-centric packet switched data traffic driven by the influx of high bandwidth applications. This is made more urgent by the large and growing optical-electronic band...

We have simulated the behaviors of nonlinear fiber Bragg gratings (FBGs). The generalized nonlinear equations governing these structures are solved by a method which uses a Fourier series procedure and a simple iterative method. All of the nonlinear effects are considered. Bragg soliton generation in intrinsic media and birefringence effects in FBGs are studied. We found that the first order di...