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本文分析了长波段掺铒光纤放大器 (EDFA)的增益系数与 Er3+离子浓度的关系 .研制了铝共掺杂的高浓度掺铒光纤 ,以缩短长波段掺铒光纤的长度 .用两级泵浦实现了 L-波段EDFA.光纤放大器的掺铒光纤总长 1 8m,在 1 570 nm波长处的小信号增益为 42 .2 6d B,输出功率为 1 7.5d Bm.我们认为 ,较低的浓度淬灭效应归因于光纤中较高的 A1掺杂浓度 .当总的输入信号功率为 - 3d Bm时 ,在 1 570至 1 60 0 nm间的 7路 WDM信号的增益不平坦度仅为0 .68d B.
In this paper, the relationship between gain coefficient and Er3 + ion concentration of long-wavelength erbium-doped fiber amplifier (EDFA) is analyzed.The high concentration erbium doped fiber with aluminum co-doping is developed to shorten the length of erbium-doped fiber in long wavelength band, L-band EDFA is realized.The total length of erbium-doped fiber in fiber amplifier is 18 m, the small signal gain at wavelength of 1570 nm is 42.26 d B, and the output power is 1 7.5d Bm. In our opinion, the lower concentration quenching The extinction effect is attributed to the higher Al doping concentration in the fiber. The gain unevenness of the 7 WDM signals between 1 570 and 1 60 0 nm is only 0 when the total input signal power is -3 dBm. 68d B.