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建立了包含载流子浓度脉动(CDP)、自由载流子吸收(FCA)、受激辐射(SE)、双光子吸收(TPA)、光谱烧孔(SHB)和超快非线性折射(UNR)过程的半导体光放大器(SOA)理论模型,通过与已报道的实验结果的比较对模型进行了验证,实现了对已有SOA模型的修正,并对UNR,FCA和TPA效应对强超短光脉冲传输特性的影响进行了分析.当脉宽为几个皮秒的强光脉冲注入工作于透明电流下的SOA时,其强度特性主要受FCA和TPA效应的影响.由于加入了FCA效应,使模型对200fs脉冲强度传输特性的仿真结果与实验结果基本相符,扩大了模型的适用范围.
A series of experiments including carrier concentration pulsation (CDP), free carrier absorption (FCA), stimulated emission (SE), two photon absorption (TPA), spectral hole burning (SHB) and ultrafast nonlinear refraction (UNR) (SOA) theoretical model, the model is validated by comparison with the reported experimental results, the existing SOA model is modified, and the effect of UNR, FCA and TPA on the performance of strong ultrashort optical pulse Transmission characteristics are analyzed.When a pulse of several picoseconds pulse width is injected into the SOA under the transparent current, the intensity characteristics of the SOA are mainly affected by the FCA and TPA effects.Because of adding FCA effect, the model The simulation results of the transmission characteristics of 200fs pulse intensity are in good agreement with the experimental results, which enlarges the applicable range of the model.