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Abstract
We demonstrate the suppression of parametric instability in an 80-meter-long Fabry-Perot cavity through optical actuation in an electro-optical feedback loop. The suppression of the high-order mode is achieved by injecting a high-order mode with the same frequency and opposite phase. The beat note signal between the fundamental and high-order mode in the transmission of the cavity is filtered, amplified, and applied to an electro-optical modulator to create a sideband at the high-order mode frequency. Misalignment of the injection couples a small part of this sideband to the high-order mode of the cavity. The paper presents a theoretical analysis and an experimental demonstration of parametric instability suppression for an instability that would normally ring up with a parametric gain of approximately 2.5.
Original language | English |
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Article number | 102006 |
Journal | Physical Review D |
Volume | 109 |
Issue number | 10 |
DOIs | |
Publication status | Published - 15 May 2024 |
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Dive into the research topics of 'Demonstration of the parametric instability suppression through optical feedback'. Together they form a unique fingerprint.Projects
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Enhancing gravitational wave detector sensitivity & bandwidth for astronomy
Zhao, C. (Investigator 01), Blair, D. (Investigator 02), Ju, L. (Investigator 03), Aspelmeyer, M. (Investigator 04), Miao, H. (Investigator 05), Sadeghian, H. (Investigator 06), Chao, S. (Investigator 07) & Cole, G. (Investigator 08)
ARC Australian Research Council
1/05/17 → 31/12/23
Project: Research