公开(公告)号：US10378971B2

公开(公告)日：2019-08-13

申请号：US15328740

申请日：2015-07-16

申请人： UNIVERSITÉ DE MONS ,  EMPHASE SPRL

发明人： Frédéric Musin ,  Marc Wuilpart ,  Patrice Megret

IPC分类号： G01N25/18 ,  G01K11/32

摘要： The present invention is related to a method for determining distributed temperature variation of a few mode optical fiber comprising the steps of:—providing a few mode optical fiber;—enlighting a first end of said few mode optical fiber by means of a coherent light source;—determining the interference pattern of coherent light at a second end of the optical fiber;—selecting one maximum of intensity at the second end of the optical fiber by spatially filtering the enlighting at the first end of the optical fiber;—determining the path length of the trajectory of the selected maximum of intensity;—based upon the determined path length of the trajectory of the selected maximum of intensity, determining the temperature variation of the few mode optical fiber.

公开(公告)号：US20170219442A1

公开(公告)日：2017-08-03

申请号：US15328740

申请日：2015-07-16

申请人： UNIVERSITÉ DE MONS ,  EMPHASE SPRL

发明人： Frédéric Musin ,  Marc Wuilpart ,  Patrice Megret

IPC分类号： G01K11/32

CPC分类号： G01K11/32

摘要： The present invention is related to a method for determining distributed temperature variation of a few mode optical fibre comprising the steps of:—providing a few mode optical fibre;—enlighting a first end of said few mode optical fibre by means of a coherent light source;—determining the interference pattern of coherent light at a second end of the optical fibre;—selecting one maximum of intensity at the second end of the optical fibre by spatially filtering the enlighting at the first end of the optical fibre;—determining the path length of the trajectory of the selected maximum of intensity;—based upon the determined path length of the trajectory of the selected maximum of intensity, determining the temperature variation of the few mode optical fibre.