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In direct-detection OFDM systems, the nonlinear effects caused by optical modulation and fiber transmission can degrade the system performance severely. In this study, we propose a new nonlinear companding transform to improve the performance of direct detection optical OFDM transmission systems. The demonstration is realized by Monte-Carlo simulation of the intensity modulation and direct detection...
We present the two-stage optical phase conjugation (OPC) to compensate both dispersion and Kerr nonlinearities in a long-haul 4×56 Gbit/s RZ-DQPSK DWDM transmission system. The two-stage OPC is realized to reduce the amount of unwanted products that are produced through nonlinear mixing processes in third-order nonlinear media. We have investigated the benefit of the two-stage OPC using highly nonlinear...
We studied the performance of a next-generation mobile backhaul network that is based on a hybrid architecture employing NG-PON2 (TWDM-PON) and FSO technologies. We have developed a mathematical model of the downlink system. We then comprehensively analyzed the performance of TWDM-PON/FSO-hybrid backhaul downlink while considering the impacts of various physical layer impairments of both optical fiber...
We present the nonlinearity compensation scheme using optical phase conjugation (OPC) for dense wavelength division multiplexing (DWDM) transmission systems. The OPC is realized by four-wave mixing process in a dispersion engineered chalcogenide waveguide. Performance of the 4×56 Gbit/s DQPSK system in nonlinear transmission scheme has been investigated. Simulated results also indicate that this method...
We propose an efficient dynamic RMSA (Routing, Modulation and Spectrum Assignment) algorithm that considers the limitation on the size of virtualized elastic regenerators for multi-domain elastic optical networks. The proposed algorithm is able to cope with the restriction on the regeneration capability of domain-edge nodes and to exploit the advantages of virtualized elastic regenerators for establishing...
To support the future envisaged services that require a dynamic provision of wavelength paths, we have developed a dynamic optical path network utilizing the multi-stage routing capable selective switch-based optical cross-connect architecture. We evaluated and compared the performance of the developed network to that of conventional optical WDM networks. We also estimated the impact of intra-node...
We present the dispersion compensation scheme using optical phase conjugation (OPC) for long-haul transmission systems. The OPC is realized by four-wave mixing process in a dispersion engineered chalcogenide waveguide. Performance of the 1600-km transmission system using different modulation formats at 40 Gbaud has been investigated. Simulated results also indicate that this method is more efficient...
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