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Cryogenic Refractive Index of Heraeus Homosil Glass

机译：贺利氏均质玻璃的低温折射率

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This paper reports measurements of the refractive index of Homosil (Heraeus) over the wavelength range of 0.34-3.16 urn and temperature range of 120-335 K. These measurements were performed by using the Cryogenic High Accuracy Refraction Measuring System (CHARMS) facility at the NASA's Goddard Space Flight Center. These measurements were in support of an integrated Structural-Thermal-Optical-Performance (STOP) model that was developed for a field-widened Michelson interferometer that is being built and tested for the High Spectral Resolution Lidar (HSRL) project at the NASA Langley Research Center (LaRC). The cryogenic refractive index measurements were required in order to account for the highly sensitive performance of the HSRL instrument to changes in refractive index with temperature, temperature gradients, thermal expansion, and deformation due to mounting stresses. A dense coverage of the absolute refractive index over the aforementioned wavelength and temperature ranges was used to determine the thermo-optic coefficient (dn/dT) and dispersion relation (dn/dλ) as a function of wavelength and temperature. Our measurements of Homosil will be compared with measurements of other glasses from the fused silica family studied in CHARMS as well as measurements reported elsewhere in the literature.
机译：本文报告了Homosil（Heraeus）在0.34-3.16 um波长范围和120-335 K温度范围内的折射率测量结果。这些测量结果是通过使用低温高精度屈光测量系统（CHARMS）进行的。 NASA的戈达德太空飞行中心。这些测量结果支持集成的结构-热-光学-性能（STOP）模型，该模型是为全场迈克尔逊干涉仪开发的，正在为美国国家航空航天局兰利研究中心的高光谱分辨率激光雷达（HSRL）项目进行构建和测试中心（LaRC）。为了考虑HSRL仪器对折射率随温度，温度梯度，热膨胀和安装应力引起的变形的高度敏感性能，需要进行低温折射率测量。使用上述波长和温度范围内的绝对折射率的密集覆盖来确定热光系数（dn / dT）和色散关系（dn /dλ）作为波长和温度的函数。我们将对Homosil的测量结果与CHARMS中研究的其他熔融石英系列玻璃的测量结果进行比较，以及文献中其他地方报告的测量结果。

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