标题： 多层涂层中热噪声的测量与优化层厚 显示英文标题

标题： Measurement of Thermal Noise in Multilayer Coatings with Optimized Layer Thickness

摘要： 标准的四分之一波长多层光学镀膜将在给定的镀膜层数下产生最高的反射率，但通常不会在规定的反射率下产生最低的热噪声。 为了最小化热噪声而优化层厚度的镀膜可能在未来一代干涉型引力波探测器中有用，因为在这些探测器中预计镀膜热噪声将限制仪器的灵敏度。 我们展示了对标准四分之一波长镀膜和低噪声优化镀膜的热噪声的直接测量结果。 这些测量结果表明热噪声的降低与建模预测一致。 显示英文摘要

摘要： A standard quarter-wavelength multilayer optical coating will produce the highest reflectivity for a given number of coating layers, but in general it will not yield the lowest thermal noise for a prescribed reflectivity. Coatings with the layer thicknesses optimized to minimize thermal noise could be useful in future generation interferometric gravitational wave detectors where coating thermal noise is expected to limit the sensitivity of the instrument. We present the results of direct measurements of the thermal noise of a standard quarter-wavelength coating and a low noise optimized coating. The measurements indicate a reduction in thermal noise in line with modeling predictions.