利用两段掺铒光纤作为增益介质,获得C-波段与L-波段同时输出的高功率放大自发辐射(ASE)光。采用双级双程结构,两级分别采用前向和后向抽运方式,实现了功率高达19.20 mW(12.83 dBm)的C+L波段(1520～1610 nm)高稳定放大自发辐射光源,中心波长为1552.82 nm。其中以低浓度铒光纤输出起种籽光作用,提高了光源的功率,调整了光谱平坦度。分析了两级抽运源参量的变化对光源各方面性能的影响。

A high-power broadband light source covering C-band and L-band (1520～1610 nm) by using two kinds of different concentration erbium-doped fiber was reported in this paper. In the dual-stage double-pass structure, the double-pass forward pumping was used in the first stage, the fiber of lower doped concentration was 7.5 m, and the output of first stage was used as seed signal; in the second stage, backward pumping was used, and the fiber of much higher doped concentration was 31.2 m. The fiber loop reflector was used to enhance the conversion efficiency of pumping LD, and high output power and good flatness were also achieved. After matching the pumping power of the two stages, the amplified spontaneous emission (ASE) source with the high output power of 19.20 mW (12.83 dBm) and with the mean wavelength of 1552.82 nm was developed and obtained. Meanwhile, the relation between the output and the change of pumping in the configuration was discussed implicitly, it was important to the design of the source.