Strain measurement using frequency modulation fiber optic interferometer  

作　　者：LIChangchun LUOFei 

机构地区：[1]Dept.ofMeasur.andInstrum.Eng.,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,CHN [2]Dept.of

出　　处：《Semiconductor Photonics and Technology》1995年第1期31-34,共4页半导体光子学与技术（英文版）

摘　　要：The method for measuring the strain of an object using an optical fiber and a frequency modulation(FM) coupled cavity semiconductor laser is proposed.This method uses the coherent FM heterodyne principle of the Michelson interferometer and can avoid the π/2 nonreciprocal phase bias and phase shifting problem existing in general fiber optic interferential sensors, the maximum detection range is limited by the coherent length of the semiconductor laser and its relative factor.ＳｔｒａｉｎｍｅａｓｕｒｅｍｅｎｔｕｓｉｎｇｆｒｅｑｕｅｎｃｙｍｏｄｕｌａｔｉｏｎｆｉｂｅｒｏｐｔｉｃｉｎｔｅｒｆｅｒｏｍｅｔｅｒＬＩＣｈａｎｇｃｈｕｎ；ＬＵＯＦｅｉ（Ｄｅｐｔ．ｏｆＭｅａｓｕｒ．ａｎｄＩｎｓｔｒｕｍ．Ｅｎｇ．，ＮａｎｊｉｎｇＵｎｉｖ...

关 键 词：Frequency Modulation Fiber Optic Sensors Semiconductor Lasers Michelson Interferometer 

分 类 号：TG115.5[金属学及工艺—物理冶金] TP212[金属学及工艺—金属学]