Source: http://jmoe.org/index.php/jmoe/article/view/259
Timestamp: 2019-04-24 12:25:12+00:00

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This paper presents a qualitative analysis of the impact caused by fiber propagation effects and by a cascade of optical filters, designed for 10Â Gb/s NRZ OOK transmission, and optical amplifiers on a 20Â Gb/s NRZ OOK optical signal traveling a 390Â km fiber link. The choice for such bit rate and modulation format has been driven by the 50Â GHz bandwidth of the filters (in the ITU DWDM grid) and by simplicity and low cost, respectively. The system, investigated experimentally and numerically, comprises 4 spans of standard fiber and a concatenation of 7 dispersion compensating modules, 4 wavelength selective switch reconfigurable optical add and drop multiplexers, 9 erbium-doped fiber amplifiers and 1 WDM-DEMUX (>Â 75Â GHz bandwidth). We demonstrate the feasibility of such bit rate upgrade in a cost-effective network planning strategy, which may be more adequate for regions where the demand for bandwidth do not require a jump to higher capacities (i.e. 40 and 100Â Gb/s), thus allowing for reusing the 10Â Gb/s installed infrastructure.
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