Abstract
Routing and wavelength assignment problem is one of the main problem in optical networks. The foremost problem is the routing problem after which the wavelength assignment is to be decided. In this paper we have proposed a routing strategy for optimization of the performance of the optical network in terms of blocking probability. The strategy proposed is better than the conventional algorithm in terms of blocking.Â
Highlights
Optical fibers are long, thin strands of very pure glass about the diameter of a human hair
The idea of optical communication using a fiber is that, if an optical signal passing through an optical medium with a higher refractive index, say μ1, meets another optical medium with a lower refractive index, say μ2, at an angle greater than the critical angle sin-1 μ2/μ1, total internal reflection takes place where the signal is entirely reflected back into the denser medium [1]
Optical signal propagates through the core of the fiber using a series of such total internal reflections (Figure 1)
Summary
Thin strands of very pure glass about the diameter of a human hair They are arranged in bundles called optical cables and are used to transmit optical signals over long distances. Optical signal propagates through the core of the fiber using a series of such total internal reflections (Figure 1). Figure Optical signal propagationusing total internal reflection The potential transmission capacity of optical fiber is enormous. The longer a fiber, the lower is its achievable transmission rate [2]. Multimode fibers can achieve data rates between a few hundred Mbps to around 10 Gbps, depending on the transmitter technology. A single encoded optical signal can be used to transmit at the rate of 2.5 Gbps, 10 Gbps or even 40 Gbps, over a distance of ten kilometers or more. Future systems may use higher data rates of 160 Gbps
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