Title

High power interferometric phase measurement limited by quantum noise and application to detection of gravitational waves

Document Type

Article

Publication Date

1-1-1998

Abstract

Interferometric detection of gravitational waves at levels of astrophysical interest is expected to require measurement of optical phase differences of ≤ 10-10 rad. To achieve this sensitivity the measurement must be made at the quantum (shot noise) limit. We have built a laboratory-scale interferometer to investigate limits to sensing the phase at this level, and obtained, with 70 W of circulating power, a phase sensitivity limited by shot noise of 3×10-10 rad/√Hz at frequencies above 1.5 kHz. We describe the experiment and discuss the implications for the Laser Interferometer Gravitational-Wave Observatory (LIGO). © 1998 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

3181

Last Page

3184

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