Refractive index measurement in the range of 1.3 – 1.5 for 1550 nm wavelength (2nd serie)

The low-coherence refractive index measurements of certified liquid samples provided by Cargille Labs were performed. The measurement system consisted of a broadband light source (central wavelength of 1550 nm), an optical spectrum analyzer, a 2x1 fiber-optic coupler (50:50 power split), and single-mode telecommunication optical fibers. A micromechanical setup served for positioning and stabilizing the measurement head. The measurement head was constructed as a Fabry-Perot cavity formed between the polished fiber end-face and a surface of a silver mirror. The sensor was operating in a reflecting mode. The cavity length was set to 280 µm; the measurements of refractive index were performed in the range of 1.3 – 1.5 with an increment equal to 0.01. Two series of 10 spectra measurements for each liquid were carried out. A reference signal with a cavity filled with air was recorded to confirm its intact setting after cleaning and changing the liquid inside the cavity.

The Folder name indicates the nominal refractive index of the measured liquid sample.The Files named W0000-W0010 in each folder are subsequently recorded spectra for the given sample.REF files are reference measurements taken for air filling the cavity of the same length.
The liquids are in the refractive index range of 1.3-1.5 with an increment of 0.01.The cavity length was set to 280 um. The measurement set-up.

本数据集包含由Cargille Labs提供的认证液态样品的低相干折射率测量数据。本次测量所采用的系统包括宽带光源（中心波长1550 nm）、光谱分析仪、2×1光纤耦合器（功率分配比50:50）以及单模通信光纤。采用微机械装置对测量探头进行定位与稳定：该探头由抛光后的光纤端面与银镜表面构成法布里-珀罗（Fabry-Perot）谐振腔，工作于反射模式。谐振腔长度设置为280 μm；折射率测量范围为1.3至1.5，测量步长为0.01。针对每种液态样品，均开展了两组共10次光谱测量。在清洁谐振腔并更换腔内液体后，会记录以空气填充谐振腔的参考信号，以验证系统设置正常。

文件夹名称代表被测液态样品的标称折射率。每个文件夹内命名为W0000-W0010的文件依次为对应样品的光谱测量数据。REF文件为以相同长度谐振腔填充空气时的参考测量结果。本次测量涉及的液态样品折射率范围为1.3-1.5，步长为0.01，谐振腔长度设置为280 μm。测量装置。