Evaluation of BER Performance in the Presence of ASE Noise using Cascaded Optical Fibre Amplifiers
- Author Godwin Effiong
- Co-Author Tebe Larry Ojukonsin, Ayibapreye Kelvin Benjamin
- DOI https://ww
- Country : Nigeria
- Subject : Physics
Keywords : BER performance, ASE noise, Optical fibre, Cascaded amplifiers.
Abstract
For accurate prediction of the bit-error rate (BER) performance in cascaded optical amplifiers, it is germane to calculate the BER at the input and output of every optical amplifier in cascade. This was implemented by considering two cases: first, a simulation of the BER calculator with all noises (thermal receiver and shot noises) to help determine what happens if specific receivers are used and secondly, a simulation is implemented with only optical beat noises. The fibre length was calculated from the total loss (taking a value for attenuation in dB/km and a value for the allocation of loss to the other components). For both noise cases, the Q-factor with penalty due to dispersion was calculated and the values were the same together with the total amplified spontaneous emission power spectral density output (ASE PSDout) (W/Hz) in one polarization state. Results obtained showed that much improved Q (Q-factor with no penalty), Q-pen (Q-factor with penalty) and BERapp (BER with penalty) input with beat noises only which include spontaneous-spontaneous beat noise and signal spontaneous beat noise. However, a worst-case situation was detected with all noises included.
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