Development of an adaptive optics system for fast automatic control of laser beam jitters in air

Salvatore Grasso; Fausto Acernese; Rocco Romano; Fabrizio Barone

doi:10.1117/12.830243

1 October 2009 Development of an adaptive optics system for fast automatic control of laser beam jitters in air

Salvatore Grasso, Fausto Acernese, Rocco Romano, Fabrizio Barone

Proceedings Volume 7476, Optics in Atmospheric Propagation and Adaptive Systems XII; 74760Q (2009) https://doi.org/10.1117/12.830243
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

In this paper we present an Adaptive Optics (AO) System properly developed for the fast automatic control of laser beam jitters on first and second order Hermite Gauss (HG) modes. This research has been driven by the necessity of suppressing laser beam geometrical fluctuations in the interferometric Gravitational Waves (GW) antennas. In fact, it is demonstrated that oscillations of higher order Hermite Gauss modes in the laser source couple with the interferometer asymmetries and give rise to additional noise that limits the antenna sensitivity below the value of 10^-23 1/square root of Hz. In the paper we demonstrate the feasibility of a novel AO System performing effective laser jitters suppression in the bandwidth up to 200 Hz. In particular we describe an innovative AO System that extracts error signals as HG coefficients and then corrects the wavefront through driver commands sent to the deformable mirror in terms of Zernike profiles. We have implemented and tested an experimental Prototype of the AO System in our laboratory at the University of Salerno. The results confirm effectiveness and robustness of the control which performs significant reduction of the first and second order laser beam geometrical fluctuations. In particular we have measured the decrease of astigmatism and defocus modes of 60 dB at low frequency below 1 Hz and of 20 dB up to 200 Hz, which at the best of the present technology fulfils the requirements for noise reduction of the interferometric GW detectors.

Citation Download Citation

Salvatore Grasso, Fausto Acernese, Rocco Romano, and Fabrizio Barone "Development of an adaptive optics system for fast automatic control of laser beam jitters in air", Proc. SPIE 7476, Optics in Atmospheric Propagation and Adaptive Systems XII, 74760Q (1 October 2009); https://doi.org/10.1117/12.830243

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Adaptive optics

Antennas

Control systems

Interferometry

Wavefronts

Automatic control

Prototyping

Show All Keywords

Keywords/Phrases

Search In:

Publication Years