Abstract
A new double pass long wavelength band erbium-doped fiber amplifier (L-band EDFA) configuration with improved gain and noise figure is demonstrated by placing a band-pass filter in the output end of the erbium-doped fibre (EDF). Compared to the previous double pass amplifier, the proposed amplifier provides a maximum gain enhancement of 1.5 dB with reduction of noise figure by 1.2 dB at a pump power of 83 mW.
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