基于铒镱共掺光纤光栅的M-Z干涉型全光开关

Mach-Zehnder Interferometer Type All-optical Switching Basedon Er-Yb Codoped Fiber Gratings

提出了基于铒镱共掺光纤光栅的马赫 曾德尔 (M Z)干涉仪结构的光控光开关 ,干涉仪的一臂为铒镱共掺光纤 ,另一臂为铒镱共掺光纤光栅。通过泵浦光来抽运铒镱共掺光纤从而调节两个臂信号光的相位差 ,引起干涉的变化 ,从而实现了光开关的作用。实验上在 10mW的泵浦功率水平下 ,实现了消光比为 8dB的全光开关。

A new scheme of all-optical switching is put forward using all-fiber Mach-Zehnder interferometer incorporated with Er-Yb codoped fiber Bragg gratings.The switching is achieved by adjusting the phase difference between the two arms of interferometer.In our experiment,the extinction ratio of 9 dB is achieved using only the pump power of 10 mW.