Residual amplitude modulation in interferometric gravitational wave detectors

被引：26

作者：

Kokeyama, Keiko ^{[1
]}

Izumi, Kiwamu ^{[2
,3
]}

Korth, William Z. ^{[4
]}

Smith-Lefebvre, Nicolas ^{[4
]}

Arai, Koji ^{[4
]}

Adhikari, Rana X. ^{[4
]}

机构：

[1] Louisiana State Univ, Baton Rouge, LA 70806 USA

[2] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

[3] LIGO Hanford Observ, Richland, WA 99352 USA

[4] CALTECH, Pasadena, CA 91125 USA

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2014年 / 31卷 / 01期

基金：

美国国家科学基金会;

关键词：

NOISE;

D O I：

10.1364/JOSAA.31.000081

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The effects of residual amplitude modulation (RAM) in laser interferometers using heterodyne sensing can be substantial and difficult to mitigate. In this work, we analyze the effects of RAM on a complex laser interferometer used for gravitational wave detection. The RAM introduces unwanted offsets in the cavity length signals and thereby shifts the operating point of the optical cavities from the nominal point via feedback control. This shift causes variations in the sensing matrix, and leads to degradation in the performance of the precision noise subtraction scheme of the multiple-degree-of-freedom control system. In addition, such detuned optical cavities produce an optomechanical spring, which also perturbs the sensing matrix. We use our simulations to derive requirements on RAM for the Advanced LIGO (aLIGO) detectors, and show that the RAM expected in aLIGO will not limit its sensitivity. (C) 2013 Optical Society of America

引用

页码：81 / 88

页数：8

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