Optical torques in suspended Fabry-Perot interferometers

被引：82
|
作者：
Sidles, JA
Sigg, D
机构：
[1] LIGO Hanford Observ, Richland, WA 99352 USA
[2] Univ Washington, Sch Med, Seattle, WA 98195 USA
来源：
PHYSICS LETTERS A | 2006年 / 354卷 / 03期
基金：
美国国家科学基金会; 美国国家卫生研究院;
关键词：
Fabry-Perot; optomechanical; torque; torsion; mirrors;
D O I：
10.1016/j.physleta.2006.01.051
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
High-power Fabry-Perot cavities with suspended mirrors are employed in gravitational wave detection. The mirrors in such interferometers are subject to forces and torques that are exerted by light pressure. This Letter derives a closed-form expression for the static torsional stiffness due to this effect. The torsional stiffness is shown to scale as the fourth power of the beam spot size. In proposed designs for next-generation interferometric gravitational wave detectors the torsional stiffness is shown to be large enough to dominate the dynamics of the mirror suspensions. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：167 / 172
页数：6
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