光纤外差干涉位移传感器性能的提高_章恩耀.pdfVIP

265 Vol.26 No.5 2 0 0 0 9 　　　　　　　　　　　　　　　OPT ICA L T ECHNIQUE　　　　　　　　　　　　　　　Sept.　2000 :1002-1582 (2000)05-0474-03 　　 光纤外差干涉位移传感器性能的提高 1 1 1 1 2 2 章恩耀, 徐铁军, 田芊, 李建军, 下河边明, 唐东雷 (1., 　100084;2., ) :(LD)、、、。 , 、, , ; , LD , , 、、 。 :;;; :T H744.3;T N25　　　:A Improving the properties of the optical-fiber heterodyne-interference displacement sensor 1 1 1 1 2 2 ZHANG En-y ao , XU Tie-jun , TIAN Qian , LI Jian-j un , Akira SHIMOKOHBE , TANG Dong-lei (1.The St te Key L bor tory of Precision Me surement T echnology nd Instrument , T singhu University, Beijing　100084) (2.T okyo Institute of T echnology , T okyo, J p n ) Abstract:The displ cement sensor w s re lized on b sis of double-ch nnel optic l-fiber Fize u type interferometer, w hich consists of l ser diode(LD), optic l isol tor, optic l-fiber direction l coupler, self-focusing lens nd etc.By dv nt ges of tri ngu- l r-edge be t sign ls, the properties of the system w ere improved w ith higher me surement-sensitivity, f ster respond to dis- pl cement nd wider me surement scope.In ddition, complement ry interferometer w s used to detect the ph se excursion of the system nd control the light w velength of the LD by feedb ck using close-circuit, which resulted in enh nced st bility nd further improved properties of the system, such s l rge me surement-scope, high resolution nd high ccur cy . Key words:l ser diode;optic fiber;heterodyne interferometer;modul tion 1 　　 (LD), , , 、。 , LD LD , , 。 , LD, LD , 。 , , 、 , 。 [1] , 。