French-German Research Institute of Saint-Louis (ISL), Saint-Louis 68301, France.
Opt Lett. 2013 May 1;38(9):1500-2. doi: 10.1364/OL.38.001500.
A concept of a fiber optic sensor consisting of a light source, a fiber coil, and a two-beam interferometer measuring angular acceleration is described. The principle differs essentially from common fiber optic gyroscopes (FOGs) still exploiting the Sagnac effect but sending light of the monochromatic source only unidirectionally into the fiber coil. A change in the optical path length in the fiber coil due to the Sagnac effect maintains proportionality to angular acceleration and could be detected by means of a subsequent two-beam interferometer. The sensitivity of this approach is in contrast to common FOGs determined not only by the total surface area enclosed by the fiber turns but also by the characteristics of the particular interferometer used.
描述了一种由光源、光纤线圈和测量角加速度的双光束干涉仪组成的光纤传感器的概念。该原理与仍利用萨格纳克效应但仅将单色光源单向送入光纤线圈的常见光纤陀螺仪 (FOG) 有本质区别。光纤线圈中由于萨格纳克效应而引起的光程变化与角加速度成比例，可以通过后续的双光束干涉仪来检测。与常见的 FOG 相比，这种方法的灵敏度不仅取决于光纤匝数所包围的总表面积，还取决于所使用的特定干涉仪的特性。
