用Khalili标准具降低未来引力波探测器的热噪声
Reducing Thermal Noise in Future Gravitational Wave Detectors by employing Khalili Etalons
摘要：
降低介质镜膜层的热噪声是提高第二代和第三代干涉型引力波探测器灵敏度的关键。已经提出用反谐振腔（所谓的哈利利腔）代替干涉仪的端镜以实现总体热噪声水平的降低。在这篇文章中，我们表明，使用的哈利利标准具，它需要更少的硬件比哈利利腔，产量仍然显着降低热噪声。我们确定了最佳分布的涂层的正面和背面的标准具和比较的总噪声预算与传统的镜子。此外，我们简要讨论了哈利利标准具的优点和缺点相比，哈利利腔的技术方面，如干涉长度控制和热透镜。
英文摘要：
Reduction of thermal noise in dielectric mirror coatings is a key issue for the sensitivity improvement in second and third generation interferometric gravitational wave detectors. Replacing an end mirror of the interferometer by an anti-resonant cavity (a so-called Khalili cavity) has been proposed to realize the reduction of the overall thermal noise level. In this article we show that the use of a Khalili etalon, which requires less hardware than a Khalili cavity, yields still a significant reduction of thermal noise. We identify the optimum distribution of coating layers on the front and rear surfaces of the etalon and compare the total noise budget with a conventional mirror. In addition we briefly discuss advantages and disadvantages of the Khalili etalon compared with the Khalili cavity in terms of technical aspects, such as interferometric length control and thermal lensing.
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