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就超快非线性干涉仪(UNI)的输入光特性对其开关窗口的影响进行了数值模拟和实验研究,输入光包括控制光脉冲和探测光脉冲。在数值模拟中,调节控制光脉冲和探测光脉冲的功率及脉宽,功率越高和脉宽越窄,窗口的形状越好。在调节过程中发现控制光脉冲和探测光脉冲都存在一个最佳的功率点使窗口的形状达到最优。如果继续增大控制光脉冲功率,会使窗口的顶部倾斜,窗口形状恶化;而继续增大探测光脉冲功率,窗口的消光比开始下降。在数值模拟的基础上进行了10 Gb/s的超快非线性干涉仪全光开关实验,在实验中用连续光代替探测光脉冲以观察窗口形状。通过改变控制光脉冲和连续光功率来验证它们对超快非线性干涉仪开关窗口的影响。实验表明,应选用短而强的控制光脉冲和最优功率点的连续光,这与模拟结果吻合。
The effects of the input light characteristics of the ultrafast nonlinear interferometer (UNI) on the switching window are numerically simulated and experimentally studied. The input light includes the control light pulse and the probe light pulse. In numerical simulation, the power and pulse width of the control light pulse and the probe light pulse are adjusted. The higher the power and the narrower the pulse width, the better the shape of the window. During the adjustment process, it is found that there is an optimal power point for the control light pulse and the probe light pulse to optimize the shape of the window. If you continue to increase the control light pulse power, the top of the window will be tilted, the window shape deteriorated; and continue to increase the probe light pulse power, the window extinction ratio began to decline. On the basis of numerical simulation, a 10 Gb / s all-optical switch experiment of ultrafast nonlinear interferometer was carried out. In the experiment, continuous light was used instead of probe light pulse to observe the window shape. By changing the control pulse and the continuous optical power to verify their impact on the fast nonlinear interferometer switching window. Experiments show that short and strong continuous pulses of light pulse and optimal power point should be chosen, which is consistent with the simulation results.