Measurement of a low-absorption sample of OH-reduced fused silica.
Measurement of a low-absorption sample of OH-reduced fused silica.
复制标题
OH 还原熔融石英的低吸收样品的测量。
作者：
S. Hild;H. Lück;W. Winkler;K. Strain;H. Grote;J. Smith;M. Malec;M. Hewitson;B. Willke;J. Hough;K. Danzmann
由羟基还原熔融二氧化硅制成的低吸收光学元件是未来引力波探测器的关键技术，如先进的LIGO。我们开发了一种利用热透镜效应测量GEO 600分束器内部吸收的灵敏方法。利用这种方法，我们得到了一片Suprasil 311 SV在1064 nm处的体吸收小于0.25ppm/cm。据我们所知，这是迄今为止文献中报道的熔融二氧化硅中光吸收的最低值。
Low-absorption optics made of OH-reduced fused silica are a key technology for future gravitational wave detectors such as the Advanced LIGO. We developed a sensitive method to measure the absorption inside the beam splitter of the GEO 600, taking advantage of the effect of thermal lensing. Using this method, we derived a bulk absorption of less than 0.25 ppm/cm for a piece of Suprasil 311 SV at a wavelength of 1064 nm. To the best of our knowledge, this is the lowest value of light absorption inside fused silica reported so far in the literature.