为了消除环境干扰对光纤干涉测量系统的影响，采用光纤3×3耦合器和光纤光栅构成光路复合在一起的两个光纤迈克尔逊干涉仪构成了光纤干涉测量系统。利用光纤光栅作为反射镜，两个光纤迈克尔逊干涉仪共有几乎相同的光路。其中一个光纤迈克尔逊干涉仪通过一个1阶反馈来补偿环境干扰的影响，实现对该测量系统的稳定；另一个光纤迈克尔逊干涉仪用于完成测量工作。结果表明，1阶反馈可以对0Hz～21Hz的干扰进行补偿，使得该测量系统适合于在线精密测量。

In order to eliminate the influences resulting from environmental disturbances, a stabilized optical fiber interferometric measurement system configured with a fiber 3×3 coupler and fiber Bragg gratings(FBGs) was designed. By employing the FBGs as in-fiber reflective mirrors, both fiber Michelson interferometers in the system shared a common-interferometric-optical path. One of the fiber interferometers was used to stabilize the system based on a first order electronic feedback loop for compensating for the environment jitter, while the other was used to perform the measurement task. The bandwidth of the feedback loop is 21Hz which endows the system stabilization for on-line precision measurement.