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Readout and Control of a Power-Recycled Interferometric Gravitational-Wave Antenna

Fritschel, Peter and Bork, Rolf and González, Gabriela and Mavalvala, Nergis and Ouimette, Dale and Rong, Haisheng and Sigg, Daniel and Zucker, Michael (2001) Readout and Control of a Power-Recycled Interferometric Gravitational-Wave Antenna. Applied Optics, 40 (28). pp. 4988-4998. ISSN 0003-6935.

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Interferometric gravitational-wave antennas are based on Michelson interferometers whose sensitivity to small differential length changes has been enhanced by the addition of multiple coupled optical resonators. The use of optical cavities is essential for reaching the required sensitivity but sets challenges for the control system, which must maintain the cavities near resonance. The goal for the strain sensitivity of the Laser Interferometer Gravitational-Wave Observatory (LIGO) is 10^-21 rms, integrated over a 100-Hz bandwidth centered at 150 Hz. We present the major design features of the LIGO length and frequency sensing and control system, which will hold the differential length to within 5 x10^-14 m of the operating point. We also highlight the restrictions imposed by couplings of noise into the gravitational-wave readout signal and the required immunity against them.

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Zucker, Michael0000-0002-2544-1596
Additional Information:© 2001 Optical Society of America Received 6 October 2000. We thank our colleagues on the LIGO project who helped us with many useful suggestions and comments. In particular, we thank Jordan Camp for his early involvement in calculating the effects of light noise sources. This research was supported by National Science Foundation cooperative agreement PHY-9210038 and grant PHY-9870032.
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Subject Keywords:Fabry-Perot interferometry
Issue or Number:28
Record Number:CaltechAUTHORS:FRIao01
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3380
Deposited By: Archive Administrator
Deposited On:02 Jun 2006
Last Modified:02 Oct 2019 23:02

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