Calibration of the LIGO displacement actuators via laser frequency modulation

被引：9

作者：

Goetz, E. ^{[1
]}

Savage, R. L., Jr. ^{[2
]}

机构：

[1] Univ Michigan, Ann Arbor, MI 48109 USA

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

来源：

CLASSICAL AND QUANTUM GRAVITY | 2010年 / 27卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1088/0264-9381/27/21/215001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a frequency modulation technique for calibration of the displacement actuators of the LIGO 4 km long interferometric gravitational-wave detectors. With the interferometer locked in a single-arm configuration, we modulate the frequency of the laser light, creating an effective length variation that we calibrate by measuring the amplitude of the frequency modulation. By simultaneously driving the voice coil actuators that control the length of the arm cavity, we calibrate the voice coil actuation coefficient with an estimated 1 sigma uncertainty of less than 1%. This technique enables a force-free, single-step actuator calibration using a displacement fiducial that is fundamentally different from those employed in other calibration methods.

引用

页数：10

共 15 条

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