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提出了一种基于光纤环形镜作为反射器的反射式L 波段掺铒光纤放大器 (EDFA)结构。光纤环形镜不但可以反射后向放大自发辐射 (ASE)作为二次抽运源 ,而且还可以反射信号 ,使信号得到二次放大。当抽运功率为115mW时 ,在 15 70～ 16 0 5nm波长范围内 ,反射式L 波段掺铒光纤放大器的平坦小信号增益达到 2 9 14dB ,与前向抽运方式L 波段掺铒光纤放大器相比 (保持平坦性不变 ) ,增益提高了 5 33dB。分别输入波长为 15 80nm和16 0 0nm的信号 ,反射式L 波段掺铒光纤放大器的饱和输出功率为 7 6 3和 7 6dBm ,与前向抽运方式L 波段掺铒光纤放大器相比分别提高了 2 98和 3dB。
A reflective L-band erbium-doped fiber amplifier (EDFA) based on fiber ring mirror was proposed. Fiber loop mirror can not only reflect the backward amplification of spontaneous emission (ASE) as a secondary pumping source, but also can reflect the signal, the signal is amplified twice. When pumping power is 115mW, the flat small-signal gain of reflective L-band erbium-doped fiber amplifier reaches 2 9 14dB in the range of 15 70 ~ 165 nm. Compared with the L-band erbium-doped fiber amplifier (Maintain flatness unchanged), the gain increased 5 33dB. Respectively, the input wavelength of 1580nm and 16 0 0nm signal, the reflective L-band erbium-doped fiber amplifier output saturation power of 7 6 3 and 7 6dBm, compared with the forward pumping L-band erbium-doped fiber amplifier increased respectively 2 98 and 3dB.