Performance Improvement of WDM Optical Network using Optimal Regenerator Placement Strategy

As the optical networks are moving towards transparent networks, the Optical-to-Electrical (O-E) conversion taking place within the link is reduced to minimal. This results into accumulation of physical layer impairments along the light path, thereby degrading the signal quality. Due to enormous data traffic carried by optical links, any link failure or non-recovery to data at the destination end may result in huge loss. To improve the system performance, the optimum placement of regenerators is one of the solutions for the same, where signal regeneration may takes place at certain pre-specified nodes. Three different strategies of regenerator placement are discussed in the present work. The improvement in system performance with this is also presented.