The phase camera and mode mismatch challenges at Advanced Virgo
(2023) Gravitational-Wave Detector workshop — Location: La Biodola, Isola d’Elba, Italy (21.May.2023)
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VIR-0322A-23_ModeMismatchAdV.docx
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- Abstract
- Minimising optical losses in interferometric gravitational-wave (GW) detectors is essential to benefit fully from advanced techniques like frequency-dependent squeezing. Mode mismatch represents a substantial source of optical loss, particularly in coupled cavities. These losses can originate from dynamic thermal effects as well as static mismatch due to manufacturing tolerances in the radius of curvature of the recycling mirrors and test masses, uncertainties in the injected beam parameter or cold wavefront aberrations. In order to correct for these effects, accurate ways to characterize mode mismatch are necessary. Here, we discuss several challenges in characterizing mode mismatch at Advanced Virgo and show a way to characterize the mismatch in the arm cavities using the phase camera. The relevance of the phase information to characterize mode mismatch is discussed as well as future prospects to tackle the current challenges. Finally, the status on a table-top setup to study generating error signals for mode mismatch with the phase camera is presented.
- Affiliations
Citations
De Abreu Silvério Cabrita, R. (2023). The phase camera and mode mismatch challenges at Advanced Virgo. Gravitational-Wave Detector workshop, La Biodola, Isola d’Elba, Italy. https://hdl.handle.net/2078.5/248128