Higher-Order Laguerre-Gauss Mode Generation and Interferometry for Gravitational Wave Detectors
Higher-Order Laguerre-Gauss Mode Generation and Interferometry for Gravitational Wave Detectors
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DOI：
10.1103/physrevlett.105.231102
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发表时间：
2010-11-30
影响因子：
8.6
通讯作者：
Barsuglia, M.
中科院分区：
文献类型：
--
作者：
Granata, M.;Buy, C.;Barsuglia, M.
我们报告的第一个实验演示高阶拉盖尔-高斯（LG（p）（l））模式的产生和干涉测量使用的方法可扩展到引力波（GW）探测的要求。使用高阶LG（p）（l）模式的GW探测器将不太容易受到镜热噪声的影响，这预计将限制目前计划的所有地面探测器的灵敏度。利用衍射光学器件和模清洁腔将LG（0）（0）高斯光束转换成纯度为98%的LG（3）（3）模。我们的激光器的LG（0）（0）模的功率与通过腔的LG（3）（3）模的功率之间的比率为36%。通过使用LG（0）（0）测量我们的设置的透射率，我们推断出特定于LG（3）（3）模式的转换效率为49%。我们用LG（3）（3）光束照明迈克尔逊干涉仪，获得了97%的可见度。
We report on the first experimental demonstration of higher-order Laguerre-Gauss (LG(p)(l)) mode generation and interferometry using a method scalable to the requirements of gravitational wave (GW) detection. GW detectors which use higher-order LG(p)(l) modes will be less susceptible to mirror thermal noise, which is expected to limit the sensitivity of all currently planned terrestrial detectors. We used a diffractive optic and a mode-cleaner cavity to convert a fundamental LG(0)(0) Gaussian beam into an LG(3)(3) mode with a purity of 98%. The ratio between the power of the LG(0)(0) mode of our laser and the power of the LG(3)(3) transmitted by the cavity was 36%. By measuring the transmission of our setup using the LG(0)(0), we inferred that the conversion efficiency specific to the LG(3)(3) mode was 49%. We illuminated a Michelson interferometer with the LG(3)(3) beam and achieved a visibility of 97%.