一种基于反射式SOA的FBG传感解调方法  

A FBG wavelength demodulation method based on reflective SOA

作　　者：张治国[1] 张民[1] 王立芊[1] 

机构地区：[1]北京邮电大学信息光子学与光通信国家重点实验室(筹),北京100876

出　　处：《光电子．激光》2011年第9期1286-1289,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2009AA01A345);中央高校基本科研业务费专项资金资助项目(BUPT2011RC0405)

摘　　要：提出一种基于反射式半导体光放大器（R-SOA）的光纤Bragg光栅（FBG）传感解调方法。周期性调谐R-SOA与可调谐FBG构成的窄带可调谐激光器,当其输出波长与FBG传感器反射波长一致时,由光电探测器输出光电流最大判断2个FBG周期的匹配并完成对传感FBG周期的测量。测量结果表明,FBG传感器中心波长在1 551.91~1 553.92 nm内的系统波长探测精度为0.02 nm。A scheme of fiber Bragg grating（FBG） wavelength demodulation based on reflective semiconductor optical amplifier（R-SOA） is proposed and demonstrated.The tunable narrowband laser consists of a R-SOA and a tunable FBG,of which the Bragg period is tunable through a one-dimensional adjustor.The one-dimensional adjustor,which is connected with a step motor controlled by a Programmable logic controller（PLC）,can control the wavelength of the laser output.The tunable narrowband laser,the FBG sensor,the O/E circuit and the detecting-and-controlling system construct a close loop,which performs the wavelength demodulation.The measurement results show that the precision of the proposed system is about 0.02 nm in a range of 2 nm.

关 键 词：反射式半导体光放大器(R-SOA) 光纤Bragg光栅(FBG) 一维调节器 步进电机 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]