在相同条件下(如抽运光功率、信号光功率等),与单抽运相比,双抽运光参量放大(OPA)的增益大,增益带宽宽。由于信号光的增益特性与参量增益系数直接相关,因此,在建立高非线性光纤(HNLF)光参量放大的理论模型的基础上,对相位匹配条件、参量增益以及信号光饱和增益的特性进行了分析讨论,采用有限差分法,对增益饱和的特性进行了模拟。结果表明,参量增益和光纤参数、输入抽运光以及信号光的波长、功率有关,而信号光的饱和增益和输入抽运功率有关。

Under the same conditions, such as the powers of signal and pump, compared with single pump, the dual-pump produces higher optical parametric gain and broader gain bandwidth. As the signal gain characteristics directly interact with the parametric gain parameter, an optical parametric amplification (OPA) model is established based on highly nonlinear fiber (HNLF) with dual-pump, and the characteristics of phase matching condition, parametric gain and signal saturation gain are discussed. The time-domain finite-difference method is adopted to simulate the characteristics of saturation gain. The results indicate that parametric gain is related to fiber parameters, launched pump and signal wavelength and power, while the signal saturation gain is related to pump power.