输入光特性对超快非线性干涉仪开关窗口的影响

王卓然; 于晋龙; 袁国慧; 王新兵; 杨恩泽

光学学报, 2005, 25 (3): 302, 网络出版: 2006-05-22

输入光特性对超快非线性干涉仪开关窗口的影响

Influences of Input Optical Pulses on Switching Window of UNI

论文大纲

王卓然 ^1,2,*于晋龙 ^1,2袁国慧 ^1,2王新兵 ^1,2杨恩泽 ^1,2

作者单位

¹ 天津大学电信学院光纤通信实验室, 天津 300072

² 天津大学光电信息技术科学教育部重点实验室,天津 300072

摘要

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。

Abstract

Influences of input optical pulses including the control pulse and probe pulse on the switching window of ultrafast nonlinear interferometer (UNI) are studied by numerical simulation and experiment. The power and width of input optical pulses are adjusted in the process of numerical simulation. In the beginning, the higher the powers of control pulse and probe pulse and the narrower the widths of them, the better the shape of the switching window. There are optimal values of the power of them for the best shape of the switching window. If the power of control pulse continues to increase, the top of the switching window inclines and the shape of the switching window gets worse. Similarly, if the power of probe pulse continues to increase, the extinction ratio of switching window would decrease. In the experiment of 10 Gb/s UNI, the continuous light is used to replace the probe pulse in order to observe the switching window. By changing the powers of control pulse and the continuous light, the results of simulation are verified. The experiment demonstrates that the high power and the narrow width of control pulse and the optimal power of continuous light should be selected. The result of experiment is quite similar to the simulation.

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王卓然, 于晋龙, 袁国慧, 王新兵, 杨恩泽. 输入光特性对超快非线性干涉仪开关窗口的影响[J]. 光学学报, 2005, 25(3): 302. 王卓然, 于晋龙, 袁国慧, 王新兵, 杨恩泽. Influences of Input Optical Pulses on Switching Window of UNI[J]. Acta Optica Sinica, 2005, 25(3): 302.

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