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A model of an Erbium Doped Fiber Amplifier (EDFA) configured in Dual Stages (DS) scheme with Tunable Band Pass (TBF) is presented. A circulator is used to reflect the amplified signal back to the Erbium-doped fiber and which is incorporated with Tunable band pass filter (TBF) which filter-out Amplified Spontaneous emission in order to ensure efficient amplification of the signal as it propagates along...
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