Abstract
In this paper, we present an analytical study of a (macro-bending EDFA)/Raman hybrid optical amplifier. The bending radius is 4mm with EDFA length 10m with forward pump power in the range (100–500mW) and Raman amplifier length (12–55km) with backward pump power variations (80–200mW) is considered in our model. Due to bending loss in EDFA, the gain of hybrid amplifier is increased to ~7dB more than the normal EDFA/Raman hybrid amplifier and the noise figure is decreased by ~2dB rather than without macro-bending EDFA/Raman hybrid amplifier. The signal to noise ratio (OSNR) calculations shows a better performance of macro-bending EDFA/Raman hybrid amplifier than without macro-bending one. A flat gain is obtained in the signal wavelength region (1560–1600nm), which is the L-band. The calculated results for macro-bending case are compared with experimental results of normal case by Lee et al., in the L-band showing an increase in the gain, reduction in the noise figure and more gain flatness at the input signal −20dBm for macro-bending EDFA/Raman hybrid amplifier.
Published Version
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