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Higher-order Laguerre-Gauss interferometry for gravitational-wave detectors with in situ mirror defects compensation

Allocca, A. and Gatto, A. and Tacca, M. and Day, R. A. and Barsuglia, M. and Pillant, G. and Buy, C. and Vajente, G. (2015) Higher-order Laguerre-Gauss interferometry for gravitational-wave detectors with in situ mirror defects compensation. Physical Review D, 92 (10). Art. No. 102002. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20151211-074513661

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Abstract

The use of higher-order Laguerre-Gauss modes has been proposed to decrease the influence of thermal noise in future generation gravitational-wave interferometric detectors. The main obstacle for their implementation is the degeneracy of modes with same order, which highly increases the requirements on the mirror defects, beyond the state-of-the-art polishing and coating techniques. In order to increase the mirror surface quality, it is also possible to act in situ, using a thermal source, sent on the mirrors after a proper shaping. In this paper we present the results obtained on a tabletop Fabry-Pérot Michelson interferometer illuminated with a LG_(3,3) mode. We show how an incoherent light source can reduce the astigmatism of one of the mirrors, increasing the quality of the beam in one of the Fabry-Pérot cavities and then the contrast of the interferometer. The system has the potential to reduce more complex defects and also to be used in future gravitational-wave detectors using conventional Gaussian beams.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.92.102002DOIArticle
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.102002PublisherArticle
Additional Information:© 2015 American Physical Society. Received 5 October 2015; published 18 November 2015. The authors would like to thank the Laboratoire d’Annecy-le-Vieux de Physique des Particules for the support with the digital control system and photodiode readout; H. Halloin and P. Prat for discussions and support with the analog electronics. M. Granata and R. Ward have contributed to the realization of the LG3,3 generator described in [17], and F. Kéfélian has contributed at the realization of the LG3,3 interferometer described in [20]. G. V. would like to acknowledge the support of the National Science Foundation and the LIGO Laboratory. 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. Finally, we would like to thank Adam Kutynia and Nicolas Smith-Lefebvre for their help in setting up the DMD board, Gary Hamming for the reading of the manuscript, and Eric Genin, Antonino Chiummo and Paul Fulda for useful discussions. This work is supported by the Agence Nationale de la Recherche under Grant No. 2010-BLANC-0416-01. M. T. is supported by the European Gravitational Observatory.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
LIGO LaboratoryUNSPECIFIED
NSFPHY-0757058
NSFPHY-0823459
Agence Nationale de la Recherche (ANR)2010- BLANC-0416-01
European Gravitational ObservatoryUNSPECIFIED
Issue or Number:10
Classification Code:PACS numbers: 04.80.Nn, 95.55.Ym, 95.75.Kk
Record Number:CaltechAUTHORS:20151211-074513661
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151211-074513661
Official Citation:Higher-order Laguerre-Gauss interferometry for gravitational-wave detectors with in situ mirror defects compensation A. Allocca, A. Gatto, M. Tacca, R. A. Day, M. Barsuglia, G. Pillant, C. Buy, and G. Vajente Phys. Rev. D 92, 102002 (2015) – Published 18 November 2015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62784
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:11 Dec 2015 19:26
Last Modified:03 Oct 2019 09:22

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