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Low phase noise squeezed vacuum for future generation gravitational wave detectors

Kijbunchoo, N. and McRae, T. and Sigg, D. and Dwyer, S. E. and Yu, Haocun and McCuller, L. and Barsotti, L. and Blair, C. D. and Effler, A. and Evans, M. and Fernández-Galiana, Á. and Frolov, V. V. and Matichard, F. and Mavalvala, N. and Mullavey, A. and Slagmolen, B. J. J. and Tse, M. and Whittle, C. and McClelland, D. E. (2020) Low phase noise squeezed vacuum for future generation gravitational wave detectors. Classical and Quantum Gravity, 37 (18). Art. No. 185014. ISSN 0264-9381. doi:10.1088/1361-6382/aba4bb.

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Squeezed light has become a standard technique to enhance the sensitivity of gravitational wave detectors. Both optical losses and phase noise in the squeezed path can degrade the achievable improvements. Phase noise can be mitigated by having a high bandwidth servo to stabilize the squeezer phase to the light from the interferometer. In advanced LIGO, this control loop bandwidth is limited by the 4 km arm cavity free spectral range to about ~15 kHz. Future generation gravitational-wave detectors are designed to employ much longer arm cavities. For cosmic explorer [1], a 40 km arm length will limit the bandwidth to ~1.5 kHz. We propose an alternative controls scheme that will increase the overall phase noise suppression by using the in-vacuum filter cavity as a reference for stabilizing the laser frequency of the squeezed light source. This will allow for rms phase noise of less than a milliradian—a negligible level for all future generations of gravitational-wave detectors [2].

Item Type:Article
Related URLs:
URLURL TypeDescription
Kijbunchoo, N.0000-0002-2874-1228
Sigg, D.0000-0003-4606-6526
Dwyer, S. E.0000-0002-2068-277X
Yu, Haocun0000-0002-7597-098X
McCuller, L.0000-0003-0851-0593
Barsotti, L.0000-0001-9819-2562
Blair, C. D.0000-0003-4566-6888
Evans, M.0000-0001-8459-4499
Fernández-Galiana, Á.0000-0002-8940-9261
Matichard, F.0000-0001-8982-8418
Slagmolen, B. J. J.0000-0002-2471-3828
Tse, M.0000-0003-1510-4921
Whittle, C.0000-0002-8833-7438
McClelland, D. E.0000-0001-6210-5842
Additional Information:© 2020 IOP Publishing Ltd. Received 30 March 2020; Accepted 10 July 2020; Accepted Manuscript online 10 July 2020; Published 19 August 2020. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation, and operates under Cooperative Agreement No. PHY-0757058. Advanced LIGO was built under Grant No. PHY-0823459. The authors also gratefully acknowledge the support of the Australian Research Council under the ARC Center of Excellence for Gravitational Wave Discovery, Grant No. CE170100004 and Linkage Infrastructure, Equipment and Facilities Grant No. LE170100217; the National Science Foundation Graduate Research Fellowship under Grant No. 1122374; and the LIGO Scientific Collaboration Fellows program. This document has been assigned the LIGO Laboratory document number LIGO-P2000064.
Funding AgencyGrant Number
Australian Research CouncilCE170100004
Australian Research CouncilLE170100217
NSF Graduate Research FellowshipDGE-1122374
LIGO Scientific CollaborationUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO DocumentP2000064
Issue or Number:18
Record Number:CaltechAUTHORS:20200821-090627580
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Official Citation:N Kijbunchoo et al 2020 Class. Quantum Grav. 37 185014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105056
Deposited By: Tony Diaz
Deposited On:21 Aug 2020 16:23
Last Modified:27 Oct 2022 23:41

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