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Published November 15, 2022 | Version Published
Journal Article Open

Demonstration of length control for a filter cavity with coherent control sidebands

Creators

  • 1. ROR icon National Astronomical Observatory of Japan
  • 2. ROR icon Laser Interferometer Gravitational Wave Observatory
  • 3. ROR icon University of Tokyo
  • 4. ROR icon Astroparticle and Cosmology Laboratory
  • 5. ROR icon National Institute for Subatomic Physics
  • 6. ROR icon Université Savoie Mont Blanc
  • 7. ROR icon University of Electro-Communications
  • 8. ROR icon California Institute of Technology
  • 9. ROR icon National Tsing Hua University
  • 10. ROR icon Max Planck Institute for Gravitational Physics

Abstract

For broadband quantum noise reduction of gravitational-wave detectors, a frequency-dependent squeezed vacuum field realized using a filter cavity is the most promising technique and will be implemented in Advanced LIGO and Advanced Virgo in the fourth observing run. To obtain the benefit of frequency-dependent squeezing, the length and alignment of the filter cavity with respect to the squeezed vacuum field must be accurately controlled. To this purpose, a new length and alignment control scheme for a filter cavity, using coherent control sidebands, was suggested [Phys. Rev. D 102, 042003 (2020)]. The coherent control sidebands are already used to control the squeezing angle in squeezed vacuum sources for gravitational-wave detectors. As both the squeezed vacuum field and coherent control sidebands have the same mode-matching conditions and almost the same frequency, the length and alignment of the filter cavity with respect to the squeezed vacuum field can be accurately controlled with this scheme. In this paper, we experimentally demonstrate the new control scheme for a filter cavity with coherent control sidebands. In addition to the conventional filter cavity control with the green field, we succeed in controlling the length of a 300-m filter cavity with coherent control sidebands and reduce the filter cavity length noise (rms) from 6.8 to 2.1 pm.

Additional Information

© 2022 American Physical Society. We thank the Advanced Technology Center (ATC) of NAOJ for its support. This work was supported by the JSPS Grant-in-Aid for Scientific Research (Grants Nos. 15H02095, 18H01235, and 21H04476), the LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), and the EU Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie Grant Agreement No. 734303 (NEWS) and 101003460 and GA 101003460 (PROBES). N. A. was supported by the JSPS Grant-in-Aid for Scientific Research (Grant No. 18H01224), the JSPS Grant-in-Aid for Challenging Research (Exploratory) (Grant No. 18K18763), and the JST CREST (Grant No. JPMJCR1873). E. C., M. E., and M. P. were supported by the JSPS Grant-in-Aid for JSPS Fellows (Grants Nos. 18F18024, 20F20803, and 20F20713), respectively. H. L. and H. V. were supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy—EXC 2123 QuantumFrontiers—390837967.

Attached Files

Published - PhysRevD.106.102003.pdf

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PhysRevD.106.102003.pdf

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Additional details

Identifiers

Eprint ID
122204
Resolver ID
CaltechAUTHORS:20230710-599244800.17

Related works

Describes
10.1103/PhysRevD.106.102003 (DOI)

Funding

Japan Society for the Promotion of Science (JSPS)
15H02095
Japan Society for the Promotion of Science (JSPS)
18H01235
Japan Society for the Promotion of Science (JSPS)
21H04476
Agence Nationale pour la Recherche (ANR)
ANR-10-LABX-0023
Agence Nationale pour la Recherche (ANR)
ANR-18-IDEX-0001
Marie Curie Fellowship
734303
Marie Curie Fellowship
101003460
Japan Society for the Promotion of Science (JSPS)
18H01224
Japan Society for the Promotion of Science (JSPS)
18K18763
Japan Society for the Promotion of Science (JSPS)
JPMJCR1873
Japan Society for the Promotion of Science (JSPS)
18F18024
Japan Society for the Promotion of Science (JSPS)
20F20803
Japan Society for the Promotion of Science (JSPS)
20F20713
Deutsche Forschungsgemeinschaft (DFG)
EXC 2123 - 390837967

Dates

Created
2023-08-11
Created from EPrint's datestamp field
Updated
2023-08-14
Created from EPrint's last_modified field

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LIGO