论文标题
具有非相同镜子的Fabry-Perot腔的衍射损失
Diffraction losses of a Fabry-Perot cavity with nonidentical non-spherical mirrors
论文作者
论文摘要
具有优化共振条件和高质量因素的光学空腔是重要的计量工具。特别是，它们用于激光引力波（GW）探测器。为了在GW探测器中具有较高的空腔功率，有必要通过抑制有害高阶光学模式（HOOM）的共振条件来抑制参数不稳定性。通过在对称的Fabry-Perot（FP）腔中使用非球形镜子，可以通过增加Hooms的圆形损失来有效地实现这一目标。大多数GW探测器中的Fabry-Perot腔都具有非相同的镜子，可以通过减小面向梁分离器和回收腔的腔体的一侧的梁尺寸来优化剪接损失并降低热噪声。在这里，我们提出了一种在非对称FP腔中设计非球形非相镜的通用方法。所提出的设计允许抑制由测试质量吸收器引起的手臂功率的损失。
Optical cavities with both optimized resonant conditions and high quality factors are important metrological tools. In particular, they are used for laser gravitational wave (GW) detectors. It is necessary to suppress the parametric instability by damping the resonant conditions of harmful higher order optical modes (HOOM) in order to have high cavity powers in GW detectors. This can be achieved effectively by using non spherical mirrors in symmetric Fabry-Perot (FP) cavities by increasing roundtrip losses of HOOMs. Fabry-Perot cavities in most of the GW detectors have non-identical mirrors to optimize clipping losses and reduce thermal noise by reducing the beam size on one side of the cavity facing to the beam splitter and recycling cavities. We here present a general method to design non spherical non-identical mirrors in non-symmetric FP cavities to damp HOOMs. The proposed design allows to the suppress the loss of the arm power caused by point absorbers on test masses.
