Thermal lensing in cryogenic sapphire substrates
Thermal lensing in cryogenic sapphire substrates
复制标题
低温蓝宝石衬底中的热透镜效应
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
K. Kuroda
中科院分区：
文献类型：
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作者：
T. Tomaru;Toshikazu Suzuki;S. Miyoki;T. Uchiyama;C. Taylor;A. Yamamoto;T. Shintomi;M. Ohashi;K. Kuroda
我们报告了低温蓝宝石镜中热透镜效应的减少，该镜计划用于大型低温引力波望远镜项目。我们测量了低温下热透镜效应蓝宝石衬底的三个关键参数。它们是低温下的光吸收系数、热导率和折射率温度系数。在这些测量的基础上，我们通过波前追踪模拟估计了具有热透镜效应的干涉仪的散粒噪声灵敏度。我们发现低温蓝宝石镜面中的热透镜效应可以忽略不计。
We report the reduction of thermal lensing in cryogenic sapphire mirrors, which are planned to be used in the large scale cryogenic gravitational wave telescope project. We measured three key parameters of sapphire substrate for thermal lensing at cryogenic temperature. They are the optical absorption coefficient, thermal conductivity and temperature coefficient of refractive index at cryogenic temperature. On the basis of these measurements, we estimated the shot noise sensitivity of the interferometer with thermal lensing by using a wavefront tracing simulation. We found that thermal lensing in cryogenic sapphire mirrors is negligible.