A Novel Method for Capacity Enhancement of Fiber and Minimization of Four Wave Mixing in WDM Optical Network

In today's world, data rate and bandwidth are the two most important considerations while designing any communication systems. Optical fiber communication is one such system that can offer data rate and bandwidth of the order of few terahertz with the use of wavelength division multiplexing in which several wavelengths can be sent over the same fiber simultaneously without interference. In case of wavelength division multiplexing based optical network, routing and wavelength assignment schemes are used to establish light wavelengths or ligthpaths between source and destination nodes for efficient utilization and allocation of available wavelength spectrum with minimum adjacent channel interference. However, nonlinearities such as four wave mixing cause interaction of different lightpaths while transmission which degrades the performance of the network in terms of bit error rate and signal-to-noise ratio. In this paper, novel wavelength assignment scheme is proposed to mitigate effect of four wave mixing which is further utilized to enhance data rate of fiber.