Performance Analyses of Dense Wavelength Division Multiplexing in Ring Metropolitan Area Networks With and Without Erbium Doped Fibre Amplifier
This Paper investigates the performance of dense wa v length division multiplexing ring networks implemnted in the metropolitan areas for the purpose of deploy ing higher bit rates. The investigations were carri ed out in the Cband operating region by deploying four channels over a single standard mode fibre with channel spacing of 100GHz at 10Gbps. Transmissions of 108km and 7km with and without Erb ium Doped Fibre Amplifier (EDFA) were achieved with a 10 fixed value of Bit Error Rate (BER). The performanc e was measured through a bit rate analyser using an eye diagram.
EDFA Gain Optimization for WDM System
The gain flatness of erbium-doped fiber amplifier (EDFA) is a key device for wavelength division multiplexing (WDM) application in modern optical network systems. The purpose of this paper is to correct the gain non-uniformity for each channel in order to equalize the amplitude gain in a wavelength division multiplexing (WDM) system. The system is simulated using Optisystem software to achieve gain flatness of EDFA through optimized fiber length and pump power. The gains are flattened within 24±0.299dB from 1546nm to 1558nm band of wavelength with noise figure (NF) <6dB and bit error rate (BER) <10 -9 for 16-channels simultaneous amplification in a single stage EDFA. A WDM system which includes an EDFA is modeled and obtained maximum uniformed gains.
Prediction of net pressure on pressure equalized cavities
Abstract A numerical model has been developed for prediction of net pressure on pressure equalized cavities. The results based on this model show good agreement with those obtained from mock-up tests. Parametric studies verify that reductions in cladding load are possible, with proper design of curtain walls.