Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 140 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.

本研究获取的实验数据由干涉型光纤距离传感器采集得到。实验系统由中心波长为1310 nm的宽带光源、光谱分析仪以及功率分光比为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进行连接。测量探头由抛光后的光纤端面与平行于光纤放置的外置反射镜构成，形成法布里-珀罗（Fabry-Perot）谐振腔，其中银膜充当反射镜。通过千分尺螺杆调节谐振腔的腔长，整个实验过程中谐振腔内填充介质为空气。

本次距离测量的量程范围为0~200 µm，步长设置为10 µm。

数据表格第一列记录波长数值，单位为纳米（nm）；第二列记录功率密度数值，单位为瓦（W）。

附图：测量系统示意图，包含微机械调节结构、光纤、光源与光谱分析仪。