Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 200 um (serie 2)

The obtained data was acquired by the interferometric fiber-optic sensor of distance. The setup was constructed of a broadband light source working at the central wavelength of 1310 nm, an optical spectrum analyzer, and a fiber-optic 2x1 coupler (with the power split 50:50). All elements were connected by standard single-mode optical fibers. The measurement head was made by a polished fiber end-face and an external mirror placed parallel to the fiber, creating a Fabry-Perot cavity. The silver film played the role of the mirror.  The cavity length was changed by the use of a micrometer screw. Air was fulfilling the cavity during the whole experiment.
Measurements of distance were performed in the range of 0 – 200 µm with a step of 10 µm. 
In the first column, there is the value of the wavelength [nm].
In the second column, there is the value of the power density [W].
  Figure. The measurement system: micromechanical system, fibers, source, optical spectrum analyzer.

本实验采集的数据由干涉型光纤距离传感器获取。该测试系统由中心波长为1310 nm的宽带光源、光谱分析仪（optical spectrum analyzer）以及功率分光比为50:50的光纤2×1耦合器搭建而成，所有器件均通过标准单模光纤连接。测量探头由抛光处理后的光纤端面与平行于光纤放置的外反射镜构成，进而形成法布里-珀罗腔（Fabry-Perot cavity）；该反射镜采用银膜制备，腔长通过测微螺杆进行调节，整个实验过程中腔体内均充满空气。

距离测量的量程为0~200 µm，测量步长为10 µm。

数据表格第一列为波长值，单位为nm；第二列为功率密度值，单位为W。

附图 测量系统示意图：微机械结构、光纤、光源及光谱分析仪。