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通过数值模拟对两只半导体光放大器(SOA)级联结构的静态增益饱和特性进行了理论研究。在不考虑自发辐射的情况下,分析了注入电流对两只SOA级联结构增益的影响。实验上构建了一种基于两只SOA级联结构的多波长光纤激光器,观测并分析了半导体光放大器的驱动电流和增益带宽对多波长输出结果的影响。在室温下,获得了基本符合ITU-T标准100GHz的27个波长以上的稳定多波长输出,各信道输出功率不平坦度小于±3dB,线宽小于0.102nm,信噪比大于25dB,总输出功率为1.94mW,并且与由单只SOA构成的多波长光纤激光器进行了对比。
The static gain saturation characteristics of cascaded structure of two semiconductor optical amplifiers (SOA) are theoretically studied by numerical simulation. The effect of injection current on the gain of two SOA cascaded structures was analyzed without considering spontaneous emission. Experimentally, a multi-wavelength fiber laser based on two cascaded SOA structures was constructed. The effects of the driving current and the gain bandwidth of the semiconductor optical amplifier on the multiwavelength output were observed and analyzed. At room temperature, a stable multi-wavelength output of more than 27 wavelengths, which basically meets the ITU-T standard 100GHz, is obtained. The output power of each channel is less than ± 3dB, the linewidth is less than 0.102nm, the signal to noise ratio is greater than 25dB, the total output power 1.94mW, and compared with a multi-wavelength fiber laser consisting of a single SOA.