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In this paper the investigations on DWDM-OADM optical ring network for six nodes, 12 wavelengths on unidirectional non linear single mode fiber at data rates of 10 Gbps for CRZ data format has been reported. The performance of the system is reported on the basis of eye diagram, optical OSNR, optical power and noise power. It is reported that the variation of OSNR at wavelength 1.5550 nm is 2.5868, 2.5125 and 2.5399 dB at fiber length of 50, 75 and 100 km and maximum variation at wavelength 1.5528 nm is 9.0459, 9.3128 and 9.1299 dB at fiber length 50, 75 and 100 km.
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