Multicolor cavity metrology

被引：22

作者：

Izumi, Kiwamu ^{[2
]}

Arai, Koji ^{[1
]}

Barr, Bryan ^{[3
]}

Betzwieser, Joseph ^{[4
]}

Brooks, Aidan ^{[1
]}

Dahl, Katrin ^{[5
,6
]}

Doravari, Suresh ^{[1
]}

Driggers, Jennifer C. ^{[1
]}

Korth, W. Zach ^{[1
]}

Miao, Haixing ^{[1
]}

Rollins, Jameson ^{[1
]}

Vass, Stephen ^{[1
]}

Yeaton-Massey, David ^{[1
]}

Adhikari, Rana X. ^{[1
]}

机构：

[1] CALTECH, LIGO Lab, Pasadena, CA 91125 USA

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

[3] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland

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

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

[6] Leibniz Univ Hannover, D-30167 Hannover, Germany

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2012年 / 29卷 / 10期

基金：

美国国家科学基金会;

关键词：

2ND-HARMONIC GENERATION; LOCK ACQUISITION; STABILIZATION; NOISE; LIGO;

D O I：

10.1364/JOSAA.29.002092

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Long-baseline laser interferometers used for gravitational-wave detection have proven to be very complicated to control. In order to have sufficient sensitivity to astrophysical gravitational waves, a set of multiple coupled optical cavities comprising the interferometer must be brought into resonance with the laser field. A set of multi-input, multi-output servos then lock these cavities into place via feedback control. This procedure, known as lock acquisition, has proven to be a vexing problem and has reduced greatly the reliability and duty factor of the past generation of laser interferometers. In this article, we describe a technique for bringing the interferometer from an uncontrolled state into resonance by using harmonically related external fields to provide a deterministic hierarchical control. This technique reduces the effect of the external seismic disturbances by 4 orders of magnitude and promises to greatly enhance the stability and reliability of the current generation of gravitational-wave detectors. The possibility for using multicolor techniques to overcome current quantum and thermal noise limits is also discussed. (c) 2012 Optical Society of America

引用

页码：2092 / 2103

页数：12

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