How to stay in shape : overcoming beam and mirror distortions in advanced gravitational wave interferometers
How to stay in shape : overcoming beam and mirror distortions in advanced gravitational wave interferometers
复制标题
如何保持形状：克服先进引力波干涉仪中的光束和镜面畸变
DOI：
10.1142/9789812777386_0407
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发表时间：
2014
影响因子：
1.9
通讯作者：
C. Bond
中科院分区：
文献类型：
--
作者：
C. Bond
激光干涉仪引力波天文台（LIGO）的目标是使用激光干涉测量法探测引力波。到目前为止，科学家们还没有进行直接观测，LIGO目前正在升级为Advanced LIGO，目标是目前灵敏度的10倍。这一升级将增加仪器的复杂性，并且提前了解干涉仪的行为至关重要，特别是通过与偏离完美球体的反射镜相互作用而产生的激光束扭曲的影响。先进探测器的许多特性都会影响光束形状：反射镜的热像差、高精细度腔和信号回收。本论文报告的建模的光束和反射镜的失真，在这样的干涉仪。
详细介绍了我在博士期间开发的模型：光束失真通过添加高阶高斯模式来描述。该模型用于高级LIGO调试任务，需要达到设计灵敏度。特别是我确定在分束器的额外损失。我还报告了一个可行性研究，使用一个完全不同的光束形状，一个LG33模式，作为未来的输入光束。我表明，先进的探测器尚未与LG33模式兼容，并推导出可能的升级镜像的要求。
The Laser Interferometer Gravitational-wave Observatory (LIGO) aims to detect gravitational waves using laser interferometry. A direct observation has so far eluded scientists, and LIGO is currently being upgraded to Advanced LIGO, aiming for 10 times the current sensitivity. This upgrade will increase the complexity of the instrument and it is crucial that the behaviour of the interferometer is understood in advance, particularly the impact of distortions of the laser beam through interactions with mirrors which deviate from a perfect sphere. Many features of advanced detectors can influence the beam shape: thermal aberrations of the mirrors; high finesse cavities; and signal recycling. This thesis reports the modelling of beam and mirror distortions in such interferometers.
The model developed throughout my PhD is detailed: beam distortions are described by the addition of higher order Gaussian modes. This model is used for Advanced LIGO commissioning tasks, required to reach design sensitivity. In particular I identify additional losses at the beam-splitter. I also report a feasibility study into using a completely different beam shape, an LG33 mode, as a future input beam. I show that advanced detectors are not yet compatible with the LG33 mode and derive the mirror requirements for a possible upgrade.
用于爱因斯坦望远镜的具有直流读数的真实偏振萨尼亚克拓扑
影响因子：
5
作者：
Wang M
通讯作者：
Wang M