激光器预失真和互相关运算的方法,实现了基于DFB激光器的TGD-OFDR系统,获得了74Km的探测距离和近端10cm,远端18cm空间分辨率,这是当前公开报道的超过60 km探测距离的OFDR的最高分辨率.进一步地,在此基础上进行了一些简化系统成本的尝试.本课题实现了一种使用较低成本的器件获得长距离,高空间分辨率的OFDR技术,具有巨大...
In this paper, we present a new, real-time DAS, realized by using the time gated digital-optical frequency domain reflectometry (TGD-OFDR) method, in which the chirp pulse is divided into overlapping bands and assembled after digital decoding. The developed prototype NBX-S4000 generates a chirp...
importantly, to obtain signal in standard single-mode (SM) fibers of quality matching, or surpassing that with modified (referred to as engineered) fibers. The result of the system development is presented inFigure 1, which shows the configuration of the DAS prototype NBX-S4000 using TGD-OFDR....
Development of Real-Time Time Gated Digital (TGD) OFDR Method and Its Performance Verification.doi:10.3390/S21144865Kinzo KishidaArtur GuzikKen'ichi NishiguchiChe-Hsien LiDaiji AzumaQingwen LiuZuyuan HeMultidisciplinary Digital Publishing Institute