Design method and device of erbium-ytterbium co-doped fiber amplifier for suppressing amplified spontaneous emission

Abstract

The application provides an erbium-ytterbium co-doped fiber amplifier design method and device for suppressing amplified spontaneous emission, which comprises the following steps: obtaining the evolution distribution of pump light, signal light and amplified spontaneous emission light on an erbium-ytterbium co-doped gain fiber; further calculating the influence of different insertion positions of an amplified spontaneous emission suppression unit on the final output end amplified spontaneous emission power and signal output characteristics; taking the amplified spontaneous emission light suppression effect and the signal light output power as evaluation indexes; optimizing the design parameters of the amplified spontaneous emission suppression unit, including at least one key parameter of the action position, the suppression depth and the filtering bandwidth of the amplified spontaneous emission suppression unit; and finally outputting the design parameters of the optimized amplified spontaneous emission suppression unit. The amplified spontaneous emission suppression unit is arranged at the corresponding action position in the length direction of the erbium-ytterbium co-doped fiber in the erbium-ytterbium co-doped fiber amplifier, so that a quantitative and refined amplified spontaneous emission suppression design scheme is formed.

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