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Published November 2016 | Submitted + Published
Journal Article Open

The Advanced LIGO photon calibrators


The two interferometers of the Laser Interferometry Gravitational-wave Observatory (LIGO) recently detected gravitational waves from the mergers of binary black hole systems. Accurate calibration of the output of these detectors was crucial for the observation of these events and the extraction of parameters of the sources. The principal tools used to calibrate the responses of the second-generation (Advanced) LIGO detectors to gravitational waves are systems based on radiation pressure and referred to as photon calibrators. These systems, which were completely redesigned for Advanced LIGO, include several significant upgrades that enable them to meet the calibration requirements of second-generation gravitational wave detectors in the new era of gravitational-wave astronomy. We report on the design, implementation, and operation of these Advanced LIGO photon calibrators that are currently providing fiducial displacements on the order of 10^(−18)m/√Hz with accuracy and precision of better than 1%.

Additional Information

© 2016 AIP Publishing. Received 8 August 2016; accepted 26 October 2016; published online 14 November 2016. 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 Award No. PHY-0823459. Fellowship support from the LIGO Laboratory for S. Karki, from the LIGO Laboratory and the UTRGV College of Sciences for D. Tuyenbayev, and from the Italian National Institute of Physics for N. De Lillo is gratefully acknowledged. This work was also supported by the following NSF Grant Nos. PHY-1607336 for S. Karki, HRD-1242090 for D. Tuyenbayev, PHY-1404139 for S. Kandhasamy, and PHY-1607178 for M. Wade. This paper carries LIGO Document No. LIGO-P1500249.

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Published - 1.4967303.pdf

Submitted - 1608.05055v1.pdf


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August 20, 2023
October 23, 2023