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We proposed a seamless all-optical wavelength converter based on four wave mixing effect in highly nonlinear fibers. The proposed wavelength converter consists of a section of highly nonlinear fiber to implement bi-directionally wavelength conversion twice for seamless conversion. The seamless wavelength converter was utilized for orthogonal frequency division multiplexing signals with flexible spectra...
Orthogonal Frequency Division Multiplexing (OFDM) has recently been proposed as a modulation technique for optical networks due to its higher spectral efficiency and superior impairment tolerance. There have been extensive studies on routing and spectrum assignment (RSA) of the OFDM-based elastic optical network, of which most focus on a single route for each lightpath service. In this paper, we study...
We compare three lightpath routing and spectrum allocation algorithms for the flexi-grid optical transport networks. The three algorithms include shortest path first algorithm, grid-plane-based first-fit algorithm, and grid-plane-based exhaustive algorithm. We evaluate the performance of these algorithms through simulations. It is found that the grid-plane-based algorithms can achieve much better...
Due to the advantage of high spectral efficiency and flexible bandwidth allocation capability, coherent-optical orthogonal frequency division multiplexing (CO-OFDM) optical transport networks have recently received extensive interests. In this paper, we discuss several important research aspects on this type of network ranging from nodal architectures, key networking research issues, and testbeds.
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