中文摘要：

一个讯问系统基于二个半导体，为弱纤维布拉格栅栏(FBG ) 的光放大器被建议。第一个半导体光放大器(SOA ) 被用来调制光，并且第二 SOA 通过切换推迟把反映的信号与不同 FBG 分开了。建议系统有更低的插入损失和更高空间的分辨率，和罐头讯问时间部门和波长部门多路的 FBG 数组。与 0.2% 的反射率和沿着光纤维的 5 m 的空间分辨率，多达 50 FBG 被区分表明讯问系统。

英文摘要：

An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings （FBGs） was proposed. The first semiconductor optical amplifier （SOA） was used to modulate the light, and the second SOA separated the reflected signal from the different FBGs through delayed switching. The proposed system has lower insertion loss and higher spatial resolution, and can interrogate the time- and wavelength-division multiplexed FBG array. Up to 50 FBGs, with a reflectivity of 0.2% and a spatial resolution of 5 m along the optical fiber, were distinguished to demonstrate the interrogation system.