Optical polarization Errors in Sagnac Fiber Optic Current transducer
Sagnac fiber optic current transducer(S-FOCT) is a kind of precision instrument based on optical polarization and optical interference theory.Several key optical components in S-FOCT show error characteristics,including polarizer,integrated optical chip,quarter-wave retarder,sensing head and so on,which induces linearly polarized light wave in PM fiber and circularly polarized light wave in sensing fiber to be elliptically polarized light wave,then nonreciprocal phase shift induced by magnetic field of the current is interrupted by wrong polarization state.Focused on optical polarization error in S-FOCT,we analyze the characteristics of polarization errors associated with optical components in S-FOCT theoretically,and we demonstrate the methods to build optical polarization error models by using Poincare sphere and Jones matrix respectively.Then,based on model of polarization state in S-FOCT,we carry out simulation of polarization error characteristics in S-FOCT,and theoretically investigate the influence of several main error factors on optical polarization characteristics,including polarizer,phase delay in quarter-wave retarder,splice angular between quarter-wave retarder and PM fiber.
Fiber optic gyroscope Fiber optic current transducer Optical polarization state Phase retardation Modeling
Wang Lihui Xu Xiaosu Xu Shengbao
Key Laboratory of mcro-inertial istrument and avanced nvigation tchnology, Ministry of eucation,Scho Key Laboratory of mcro-inertial istrument and avanced nvigation tchnology, Ministry of eucation,Scho
国际会议
中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)
杭州
英文
1-6
2012-11-04（万方平台首次上网日期，不代表论文的发表时间）