CaltechAUTHORS
Published December 2013 | Version Published + Submitted
Journal Article Open

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

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Abstract

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 ≤ 1×10^−7  rad rms, and limited impact on in-band strain sensitivity.

Additional Information

© 2013 Optical Society of America. Received September 19, 2013; accepted October 8, 2013; posted October 31, 2013 (Doc. ID 197891); published November 27, 2013. We would like to thank D. H. Reitze, D. Sigg, Y. Aso, G. Mueller, and H. Grote for fruitful discussions. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the United States National Science Foundation under grant PHY-0757058. K. L. Dooley recieved support from the National Science Foundation under grant PHY-0855313. This paper has LIGO document number P1100089.

Attached Files

Published - josaa-30-12-2618.pdf

Submitted - 1310.3662v1.pdf

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1310.3662v1.pdf

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Additional details

Identifiers

Eprint ID
43432
Resolver ID
CaltechAUTHORS:20140117-113305704

Related works

Describes
http://arxiv-web3.library.cornell.edu/abs/1310.3662 (URL)

Funding

NSF
PHY-0757058
NSF
PHY-0855313

Dates

Created
2014-01-22
Created from EPrint's datestamp field
Updated
2021-11-10
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Physics Department
Other Numbering System Name
LIGO Document
Other Numbering System Identifier
P1100089