Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case

被引：33

作者：

Dooley, Katherine L. ^{[1
]}

Barsotti, Lisa ^{[1
]}

Adhikari, Rana X. ^{[2
]}

Evans, Matthew ^{[1
]}

Fricke, Tobin T. ^{[3
,6
]}

Fritschel, Peter ^{[1
]}

Frolov, Valera ^{[4
]}

Kawabe, Keita ^{[5
]}

Smith-Lefebvre, Nicolas ^{[1
,2
]}

机构：

[1] MIT, LIGO Lab, Cambridge, MA 02139 USA

[2] CALTECH, LIGO Lab, Div Phys Math & Astron, Pasadena, CA 91125 USA

[3] Louisiana State Univ, Baton Rouge, LA 70803 USA

[4] LIGO Livingston Observ, Livingston, LA 70754 USA

[5] LIGO Hanford Observ, Richland, WA 99354 USA

[6] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2013年 / 30卷 / 12期

基金：

美国国家科学基金会;

关键词：

GRAVITATIONAL-WAVE DETECTOR; ALIGNMENT; INTERFEROMETERS;

D O I：

10.1364/JOSAA.30.002618

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe the angular sensing and control (ASC) of 4 km detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). Enhanced LIGO, the culmination of the first generation LIGO detectors, operated between 2009 and 2010 with about 40 kW of laser power in the arm cavities. In this regime, radiation-pressure effects are significant and induce instabilities in the angular opto-mechanical transfer functions. Here we present and motivate the ASC design in this extreme case and present the results of its implementation in Enhanced LIGO. Highlights of the ASC performance are successful control of opto-mechanical torsional modes, relative mirror motions of <= 1 x 10(-7) rad rms, and limited impact on in-band strain sensitivity. (C) 2013 Optical Society of America

引用

页码：2618 / 2626

页数：9

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