Adaptive wave-front correction by means of all-optical feedback interferometry

Citation
T. Shirai et al., Adaptive wave-front correction by means of all-optical feedback interferometry, OPTICS LETT, 25(11), 2000, pp. 773-775
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
0146-9592 → ACNP
Volume
25
Issue
11
Year of publication
2000
Pages
773 - 775
Database
ISI
SICI code
0146-9592(20000601)25:11<773:AWCBMO>2.0.ZU;2-U
Abstract
A novel adaptive wave-front correction system based on an all-optical feedb ack interferometer is described. In this system the two-dimensional output fringe intensity from a Mach-Zehnder interferometer with large radial shear is optically fed back to an optically addressed phase-only liquid-crystal spatial light modulator. Consequently, without a separate aberration-free r eference wave, the modulator phase approximates the conjugate of the interf erometer phase that is directly related to the phase of the input aberrated wave front, so this system is applicable in adaptive optics. We successful ly achieved real-time correction of aberrated wave fronts: A diffraction pa ttern that was seriously distorted because of aberrations was transformed i nto a diffraction-limited spot immediately after the feedback loop was clos ed. (C) 2000 Optical Society of America. OCIS codes: 010.1080, 120.3180, 23 0.3720, 230.6120.