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建立了基于线性光放大器(LOA)的交叉相位调制波长转换模型,模型考虑了纵向载流子密度变化引起的有源区折射率的改变、端面反射、相位调制、放大的自发辐射噪声和横向垂直光场(VCL)的增益钳制作用。利用分段方法模拟计算了布拉格反射镜的反射率、偏置电流、信号光和探测光的功率和波长、信号速率与转换后信号啁啾的关系。结果表明:LOA具有增益钳制作用,能提高转换后信号的性能;增大布拉格反射镜的反射率可以降低转换后信号的啁啾;合理控制输入信号光和探测光的强度,调整干涉仪两臂LOA偏置电流的强度,可以获得啁啾较小的转换信号。
A cross-phase modulated wavelength conversion model based on a linear optical amplifier (LOA) is established. The model takes into account the change of the refractive index of the active region caused by the change of the longitudinal carrier density, the reflection of the face, the phase modulation, amplified spontaneous emission noise and the vertical Gain clamping of the light field (VCL). Using the segmentation method, the reflectivity, bias current, power and wavelength of signal and probe light, and the relationship between the signal rate and the converted signal chirp are simulated. The results show that: LOA has the function of gain clamping, which can improve the performance of the converted signal. Increasing the reflectivity of Bragg reflector can reduce the chirp of the converted signal. By reasonably controlling the intensity of input signal light and detecting light, LOA bias current intensity, you can get a smaller chirp conversion signal.