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Optimizing gravitational-wave detector design for squeezed light

Richardson, Jonathan W. and Pandey, Swadha and Bytyqi, Edita and Edo, Tega and Adhikari, Rana X. (2022) Optimizing gravitational-wave detector design for squeezed light. Physical Review D, 105 (10). Art. No. 102002. ISSN 2470-0010. doi:10.1103/physrevd.105.102002.

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Achieving the quantum noise targets of third-generation detectors will require 10 dB of squeezed-light enhancement as well as megawatt laser power in the interferometer arms—both of which require unprecedented control of the internal optical losses. In this work, we present a novel optimization approach to gravitational-wave detector design aimed at maximizing the robustness to common, yet unavoidable, optical fabrication and installation errors, which have caused significant loss in Advanced LIGO. As a proof of concept, we employ these techniques to perform a two-part optimization of the LIGO A+ design. First, we optimize the arm cavities for reduced scattering loss in the presence of point absorbers, as currently limit the operating power of Advanced LIGO. Then, we optimize the signal recycling cavity for maximum squeezing performance, accounting for realistic errors in the positions and radii of curvature of the optics. Our findings suggest that these techniques can be leveraged to achieve substantially greater quantum noise performance in current and future gravitational-wave detectors.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Richardson, Jonathan W.0000-0002-1472-4806
Pandey, Swadha0000-0002-2426-6781
Bytyqi, Edita0000-0002-4368-4268
Edo, Tega0000-0001-9828-028X
Adhikari, Rana X.0000-0002-5731-5076
Additional Information:© 2022 American Physical Society. (Received 24 January 2022; accepted 9 May 2022; published 18 May 2022) We are grateful to GariLynn Billingsley for providing test mass mirror maps, Hiro Yamamoto for guidance on using SIS, and Lee McCuller for helpful comments on the squeezing modeling. We would also like to thank the LIGO Laboratory for providing the resources with which to conduct this research, as well as the LIGO SURF program, the National Science Foundation, and the California Institute of Technology for sponsoring the project in part. 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-1764464. Advanced LIGO was built under Grant No. PHY-0823459. This paper has LIGO Document Number LIGO-P2100184.
Group:Astronomy Department, LIGO
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
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Other Numbering System NameOther Numbering System ID
LIGO DocumentP2100184
Issue or Number:10
Record Number:CaltechAUTHORS:20220601-257737000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114990
Deposited By: George Porter
Deposited On:01 Jun 2022 22:50
Last Modified:01 Jun 2022 22:50

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