Fast simulation of Gaussian-mode scattering for precision interferometry

Fast simulation of Gaussian-mode scattering for precision interferometry
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用于精密干涉测量的高斯模式散射的快速模拟

DOI:
10.1088/2040-8978/18/2/025604
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发表时间:
2016
期刊:
影响因子:
2.1
通讯作者:
Brown D
Brown D
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Brown D

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了解激光如何从真实的镜面散射对于精密干涉仪的设计、调试和操作至关重要,例如当前和下一代的引力波探测器。数值模拟是这项任务不可或缺的工具,但它们的效用在实践中可能受到描述散射过程的计算成本的限制。在本文中,我们提出了一种有效的方法,以显着降低计算成本的光学模拟,包括散射。这是通过构建描述散射过程的复杂多参数2D重叠积分的近最佳表示(称为降阶求积)来实现的。我们通过模拟一个接近不稳定的法布里-珀罗腔及其控制信号来演示我们的技术,这些控制信号使用与安装在LIGO引力波探测器中的光学器件类似的光学器件。我们表明,使用降阶求积减少了计算时间的数值模拟从几天到几分钟(加速
Understanding how laser light scatters from realistic mirror surfaces is crucial for the design, commissioning and operation of precision interferometers, such as the current and next generation of gravitational-wave detectors. Numerical simulations are indispensable tools for this task but their utility can in practice be limited by the computational cost of describing the scattering process. In this paper we present an efficient method to significantly reduce the computational cost of optical simulations that incorporate scattering. This is accomplished by constructing a near optimal representation of the complex, multi-parameter 2D overlap integrals that describe the scattering process (referred to as a reduced order quadrature). We demonstrate our technique by simulating a near-unstable Fabry–Perot cavity and its control signals using similar optics to those installed in one of the LIGO gravitational-wave detectors. We show that using reduced order quadrature reduces the computational time of the numerical simulation from days to minutes (a speed-up of
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