Photonic all-optical switch is widely considered as one of the techniques to utilize the enormous optical bandwidth. This paper attempts to present a mathematical model for a loop buffer based switch and brings out the aspects of designing the all optical switch. The important aspects discussed are length of the optical loop and the design of EDFA. This paper also deals with the comparison of m...

This paper proposes a new switching architecture to be used in all optical packet switching networks. The proposed switch is derived from an original 2 × 2 two-stage multi-buffer switched delay line based optical switching node, known as an M-Quadro node. By incorporating bypass lines into the M-Quadro architecture and employing a novel switch control strategy, the optical packet switching node...

Now-a-days data centers are experiencing rapid increase in network traffic and the number of servers in racks due to exponential increase of data, at the same time they have to cope with the demands of cloud computing and several emerging web applications. Keeping all these in mind we also have to consider compatibility when we will interconnect several data centers. Present data centers networ...

A large scale optical switch array based on guided-wave technology using banyan network architecture is demonstrated. Banyan network architecture is the simplest N×N network connecting a input port to all the output ports. A banyan network optical switch array serves as a base for constructing many classes of switch networks, as we propose in this report. We fabricated a 32×32 switch and measur...

We present an analysis of the optical loop mirror in which a nonlinear optical element is asymmetrically placed in the loop. This analysis provides a general framework for the operation of a recently invented ultrafast all-optical switch known as the terahertz optical asymmetric demultiplexer. We show that a loop with small asymmetry, such as that used in the terahertz optical asymmetric demult...

We report an infrared (IR) optical switch using a position-shifting glycerol droplet. The droplet is surrounded by density-matched oil. In the voltage-on state, the droplet shifts in one direction. Upon removing the voltage, the droplet returns to its original position with the aid of interfacial tensions. Due to the strong absorption of glycerol at 1.55 lm, our IR optical switch shows 95:1 con...

To construct large-scale silicon electro-optical switches for optical interconnections, we developed a method using a limited number of power monitors inserted at certain positions to detect and determine the optimum operating points of all switch units to eliminate non-uniform effects arising from fabrication errors. We also introduced an optical phase bias to one phase-shifter arm of a Mach-Z...

Optical space switches are important subsystems in optical crossconnects (OXCs) and reconfigurable optical add/drop multiplexers (R-OADMs), while also having applications in more long-term communications scenarios, such as optical packet switching. This chapter develops the theory of operation of planar optical space switches, and illustrates the interrelationship that exists between device cha...

The deployment of optical fibers as a transmission medium aroused the problem of speed mismatching between transmission and switching. To build a large IP router with capacity of 1 Tb/s and beyond, either electronic or optical switching can be used. Optical communications with photonic switching are promising to provide high bandwidth and low error probability. The major obstacle in this regard...