提出在光纤放大器中 ,使用光纤布喇格光栅作为泵浦光反射镜 ,所需的双包层光纤可以缩短 ,同时至少保持了与没有光纤布喇格光栅作为反射镜时光纤放大器相同的性能 基于速率及传输方程 ,对使用和不使用光纤布喇格光栅的铒、镱共掺双包层光纤放大器的性能进行了数值模拟 结果表明 ,使用光纤布喇格光栅作为反射镜时光纤放大器可以获得与无光栅时相同的输出功率 ,但仅仅需要后者长度一半的光纤 ,无论是前向泵浦还是后向泵浦 对后向泵浦方式并使用光纤布喇格光栅作为反射镜 ,可获得最高的输出功率及光增益 ,同时使用了较短的光纤 It is proposed that in a fiber amplifier, using a fiber Bragg grating as a pump light reflector, the desired double clad fiber can be shortened while maintaining at least the same performance as a fiber amplifier without a fiber Bragg grating as a mirror Velocity and transmission equation, the performance of erbium-ytterbium co-doped double-clad fiber amplifier with and without fiber Bragg grating is numerically simulated. The results show that the fiber amplifier with fiber Bragg grating as the reflector can obtain The same output power without grating, but only requires the latter half the length of the fiber, either forward or backward pump-to-pump versus fiber Bragg gratings as a mirror, the highest Output power and optical gain, while using a shorter fiber