S. Avino

First results on an adaptive optics pre-mode cleaning system based on interferometric phase-front detection

We present an adaptive optics (AO) system for the control of geometrical fluctuations in a laser beam based on the interferometric detection of phase front. By comparison with the usual Shack–Hartman-based AO system, we show that this technique is of particular interest when high sensitivity and high band-pass are required for correction of small perturbations such as, for instance, the control of the input beam of gravitational waves interferometric detectors.

Low- noise adaptive optics for gravitational wave interferometers

We present the results of an adaptive optics prototype system used to test the feasibility of active control for corrections of geometrical fluctuations of a gravitational wave interferometers input laser beam. It is shown that the efficiency of the system in correcting fluctuations extends up to 80 Hz unity gain frequency and that the upper limit of reintroduced noise is within the Virgo interferometer requirements.

Virgo Data analysis for C6 and C7 engineering runs

F. Acernese , P. Amico, M. Alshourbagy , F. Antonucci , S. Aoudia, P. Astone , S. Avino, D. Babusci , G. Ballardin, F. Barone, L. Barsotti, M. Barsuglia , F. Beauville, S. Bigotta , S. Birindelli, M.A. Bizouard, C. Boccara, F. Bondu, L. Bosi, C. Bradaschia , S. Braccini,A. Brillet, V. Brisson, L. Brocco , D. Buskulic, E. Calloni, E. Campagna , F. Carbognani, F. Cavalier, R. Cavalieri, G. Cella, E. Cesarini, E. Chassande-Mottin , N. Christensen, C. Corda, A. Corsi, F. Cottone , A.-C. Clapson, F. Cleva, J.-P. Coulon, E. Cuoco , A. Dari, V. Dattilo, M. Davier, M. del Prete, R. De Rosa, L. Di Fiore, A. Di Virgilio, B. Dujardin, A. Eleuteri, I. Ferrante , F. Fidecaro , I. Fiori, R. Flaminio, 2, J.-D. Fournier, O.Francois, S. Frasca , F. Frasconi, 11, L. Gammaitoni , F. Garufi, E. Genin , A. Gennai , A. Giazotto , G. Giordano, L. Giordano , R. Gouaty , D. Grosjean, G. Guidi, S. Hebri, H. Heitmann , P. Hello, S. Karkar, S. Kreckelbergh, P. La Penna, M. Laval, N. Leroy , N. Letendre , B. Lopez , Lorenzini, V. Loriette , G. Losurdo, J.-M. Mackowski, E. Majorana, C. N. Man, M. Mantovani , F. Marchesoni , F. Marion, J. Marque, F. Martelli, A. Masserot, M. Mazzoni, L. Milano, F. Menzinger, C. Moins, J. Moreau, N. Morgado, B. Mours, F. Nocera, A. Pai, C. Palomba, F. Paoletti, 11, S. Pardi, A. Pasqualetti , R. Passaquieti , D. Passuello , B. Perniola, F. Piergiovanni, L. Pinard, R. Poggiani , M. Punturo , P. Puppo , K. Qipiani, P. Rapagnani , V. Reita, A. Remillieux, F. Ricci, I. Ricciardi, P. Ruggi , G. Russo, S. Solimeno, A. Spallicci, R. Stanga , T. Marco , M. Tonelli, A. Toncelli , E. Tournefier, F. Travasso , C. Tremola, G. Vajente , D. Verkindt, F. Vetrano , A. Viceré, J.-Y. Vinet, H. Vocca and M. Yvert Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP), IN2P3/CNRS, Université de Savoie, Annecy-le-Vieux, France;

Fast and low noise adaptive optics system for the correction of micro-aberrations of laser beam

We present the results of an Adaptive Optics prototype system used to test the feasibility of active control for corrections of geometrical aberrations of gravitational wave interferometers input laser beam. It is shown that the efficiency of the system in correcting fluctuations extends up to 80 Hz unity gain frequency and that the upper limit of reintroduced noise is within gravitational wave interferometers requirements.

Laser interferometric adaptive optics system as light source of the IDGW-3P interferometer

In this paper we discuss an Adaptive Optics (AO) system for the control of geometrical fluctuations in a laser beam based on the interferometric detection of phase front. By comparison with the usual Shack-Hartmann based AO system, we show that this technique is of particular interest when high sensitivity and high band-pass are required for correction of small perturbations like, for instance, the control of the input beam of gravitational waves interferometric detectors. The good results obtained allow us to decide for its application within the mode cleaner system of the 3m prototype optical interferometer on gravitational wave detection (IDGW-3P) developed for R&D and operational in Napoli.

Laser interferometric adaptive optics system for a three-meter suspended Michelson interferometer for low-frequency seismic noise measurement

We present a study and preliminary experimental results on the possibility of using an adaptive optics system for reduction of geometrical fluctuations of input laser beam in long baseline interferometric detectors of gravitational waves. Presently used completely passive systems are expected to reduce fluctuations only at a level that, due to coupling of geometrical fluctuations with interferometer asymmetries, impose requirements on interferometer operation which are at the limit of present technology. Active pre-stabilization could reduce fluctuations and relax these requirements, allowing a safer and more robust interferometer operation on the planned time-scale of years of continuous data acquisition. The system and the methodologies we have developed are going to be adapted to the Mode Cleaner of the IDGW-3P, a prototype of three-meter suspended Michelson Interferometer expressely developed for Seismic Noise measurement, now becoming operational in Napoli.

Interferometric adaptive optics system for laser beam noise control

We present an Adaptive Optics (AO) system for the control of geometrical fluctuations in a laser beam based on the interferometric detection of phase front. By comparison with the usual Shack-Hartmann based AO system, we show that this technique is of particular interest when high sensitivity and high band-pass are required for correction of small perturbations like, for instance, the control of the input beam of gravitational waves interferometric detectors.

Adaptive optics in gravitational wave interferometers

In this paper we briefly discuss the possibility to use Adaptive Optics in long baseline interferometric gravitational wave detectors. Analisys is carried out to demonstrate the usefulness of Adaptive Optics as a method to integrate double-mode-cleaner systems, presently used or foreseen in the next generation detectors as systems for the reduction of geometrical fluctuations of input laser beam. Finally a prototype of (AO) system for the control of geometrical fluctuations in a laser beam, based on the interferometric detection of phase front, is presented. By comparison with the usual Shack-Hartmann based AO system, we show that this technique is of particular interest when high sensitivity and high band-pass are required for correction of small perturbations like, for instance, the control of the input beam of gravitational waves interferometric detectors.

Adaptive Optics correction of geometrical fluctuations of Virgo input laser beam: preliminary results

We present a study and preliminary experimental results on the possibility of using an adaptive optics system for reduction of geometrical fluctuations of input laser beam in long baseline interferometric detectors of gravitational waves. Presently used completely passive systems are expected to reduce fluctuations only at a level that, due to coupling of geometrical fluctuations with interferometer asymmetries, impose requirements on interferometer operation which are at the limit of present technology. Active pre-stabilization could reduce fluctuations and relax these requirements, allowing a safer and more robust interferometer operation on the planned time-scale of years of continue data acquisition.