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GWADW2026 - Gravitational-Wave Advanced Detector Workshop

17–23 May 2026
Hotel Hermitage, La Biodola, Isola d'Elba
Europe/Rome timezone

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Session

High Power

19 May 2026, 16:00
Hotel Hermitage, La Biodola, Isola d'Elba

Hotel Hermitage, La Biodola, Isola d'Elba

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  1. 4. First Demonstration of Optical Feedback Control to Parametric Instability at Advanced LIGO
    Juntao Pan
    19/05/2026, 16:00
    High Power
    Presentation

    Increasing the circulating power in gravitational-wave detectors to the megawatt level is essential for their proposed sensitivity, but this is critically limited by optomechanical parametric instabilities. Current mitigation strategies are projected to be ineffective against instabilities when circulating power reaches megawatt. Optical feedback offers a novel independent paradigm to mitigate...

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  2. 41. A high power bench top coupled cavity system to investigate LIGOs thermal state
    Sophie Muusse (University of Adelaide)
    19/05/2026, 16:18
    High Power
    Presentation

    The sensitivity of current GW detectors, such as aLIGO, are critically reliant on the optimal operation of its system of coupled cavities. Unfortunately, the cavities’ resonant spatial eigenmodes and their control is affected by thermal deformations, allowing lossy higher order modes to build-up, whilst reducing the gain of control sidebands. Additionally, these deformations compromise the...

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  3. 109. Thermal Compensation System tackling Optical Aberrations in Advanced Virgo for O5 and beyond
    Ilaria Nardecchia (Istituto Nazionale di Fisica Nucleare), Matteo Lorenzini (Università di Roma Tor Vergata - INFN Roma Tor Vergata)
    19/05/2026, 16:36
    High Power
    Presentation

    The optical aberration budget in present-day gravitational wave detectors is a key driver for the commissioning effort to stabilize the interferometer working point. In Advanced Virgo, extensive experience in thermal compensation of cold optical defects and high-power absorption-induced lensing has been developed within the Thermal Compensation System (TCS), in close interplay with other...

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  4. 110. Static adaptive correction to compensate for non-axisymmetric wavefront distortions in future gravitational wave detectors
    Luciano Antonio Corubolo (Istituto Nazionale di Fisica Nucleare)
    19/05/2026, 16:54
    High Power
    Presentation

    Optical aberrations in gravitational wave detectors arise mainly from laser absorption in coatings and manufacturing defects in the optics along the beam path. If left uncorrected, these distortions drive the interferometer away from its optimal operating point, degrading both stability and sensitivity. Future detectors, such as the Einstein Telescope–High Frequency, will operate with...

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  5. 116. ET OPT - Advancing High Power Precision Interferometry
    Swapnil Dhage (UCLouvain)
    19/05/2026, 17:12
    High Power
    Presentation

    The proposed Einstein Telescope high-frequency interferometers (ET-HF) in their nominal configuration are limited by coating Brownian thermal noise (CBTN) and quantum shot noise. Achieving the target sensitivity requires up to 3 MW of laser power with advanced optical coatings. At these power levels, thermo-elastic and thermo-optic effects induce wavefront distortions, causing transverse mode...

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