分布反馈半导体激光注入锁定及其光纤传感应用  

Characteristics of Distributed Feedback Semiconductor Laser Injection Locking and Applications to Optical Fiber Sensing

作　　者：周会娟[1] 陈默[1] 姚琼[1] 孟洲[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《中国激光》2011年第7期157-161,共5页Chinese Journal of Lasers

基　　金：高等学校博士学科点专项科研基金(20104307110020)资助课题

摘　　要：选用普通商用带尾纤的分布反馈式(DFB)半导体激光器作从激光器,测试了DFB半导体激光注入锁定的基本特性,如不同注入光功率下的锁定带宽、模式频谱、相位噪声及输出光功率,证明了相干光注入锁定具有极大改善从激光器频谱纯度同时不影响其输出光功率的特性;锁定后的从激光器可看作一个窄带、可调谐的光滤波器,并能提供一定的功率增益,滤波器的中心波长和带宽完全由注入光信号决定。将DFB半导体激光注入锁定技术应用于基于微波电光移频的布里渊光纤传感,实现了具有布里渊频移的单频信号提取放大,解决了直流工作点漂移带来的光强波动问题。A standard commercialized fiber-pigtailed distributed feedback（DFB） laser is chosen as the slave laser to construct the master-salve laser injection locking experimental system.The basic characteristics of the slave laser at different injection powers are measured and compared,such as the stable locking range,mode spectra,phase noises and output optical powers,which prove that the laser injection locking can greatly improve the spectral purity of the slave laser while almost not affect its output optical power.The locked slave laser acts like a narrow tunable optical filter and affords some power amplification as well.Moreover,the central frequency and bandwidth of the filter are completely decided by the input injection.Then,the DFB laser injection locking technology is used to extract and amplify the single frequency of Brillouin shift in Brillouin optical fiber sensing system based on electro-optic microwave modulation.Furthermore,the drift of the direct current operation point is resolved as well.

关 键 词：激光技术 光纤传感 窄带光滤波器 激光注入锁定 分布反馈式半导体激光器 布里渊光纤传感 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TN248.4[自动化与计算机技术—控制科学与工程]