All-optical routing

In quantum information and all-optical network, it is necessary to have devices such as quantum repeater and all-optical routing, where optical information can be transferred and distributed in a controlled fashion between different light channels. Routing and wavelength-division multiplexing of optical information has many practical applications, for example, it can be used to interface optical communication line of different wavelengths and distribute optical information between... 

Fig. 16. (a) Slow light demonstration, (b) and (c) All-optical routing based on light storage. 

For the experimental preparation of all-optical routing, we prepare the populations on ( 3 / 2) level. A gauss probe pulse is used to demonstrate light storage, and its 1/e full... 

B. S. Ham. Observations of delayed all-optical routing in a slow-light regime. Physical Revew A 2008 Jul30 78(l) 011808 (4). 

On the route to all-optical signal processing the development of materials with large third-order nonlinear optical effects is of decisive importance. For the material characterization and the assessment of its usefulness for applications the absolute value of the third-order nonlinear optical susceptibility y has to be known. Since most measurements are performed relative to a reference material, the establishment of a well accepted value for a standard material is important. 

An example of all optical A x A (A = 5) interconnection systems using an arrayed-waveguide grating as a router is shown in Fig. 16. Figure 16(a) shows the physical topology between AWG router and A nodes. Some routes may be used for connection to other networks. Based on the interconnectivity of AWG, the resulting logical connectivity patterns become A x A star network as shown in... 

An optical switch routes an optical signal from one or more input ports to one or more output ports. Theoretically, all optical switches (0-0-0) are independent of bit rate and protocols with unlimited scalability, which leads to more flexibility in the network. The choice of technology, switch architectures and size as well, plays an important role in performance of all optical switches. Following figure 1 shows a basic all optical switch with two different possible switching states named as bar cross state. In this, inputs outputs are in optical form and the switching is also performed in optical domain within the device. 

---