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Proceedings Paper

HALOS: fast, autonomous, holographic adaptive optics
Author(s): Geoff P. Andersen; Paul Gelsinger-Austin; Ravi Gaddipati; Phani Gaddipati; Fassil Ghebremichael
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Paper Abstract

We present progress on our holographic adaptive laser optics system (HALOS): a compact, closed-loop aberration correction system that uses a multiplexed hologram to deconvolve the phase aberrations in an input beam. The wavefront characterization is based on simple, parallel measurements of the intensity of fixed focal spots and does not require any complex calculations. As such, the system does not require a computer and is thus much cheaper, less complex than conventional approaches. We present details of a fully functional, closed-loop prototype incorporating a 32-element MEMS mirror, operating at a bandwidth of over 10kHz. Additionally, since the all-optical sensing is made in parallel, the speed is independent of actuator number - running at the same bandwidth for one actuator as for a million.

Paper Details

Date Published: 22 August 2014
PDF: 7 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91485S (22 August 2014); doi: 10.1117/12.2054444
Show Author Affiliations
Geoff P. Andersen, U.S. Air Force Academy (United States)
Paul Gelsinger-Austin, U.S. Air Force Academy (United States)
Ravi Gaddipati, U.S. Air Force Academy (United States)
Phani Gaddipati, U.S. Air Force Academy (United States)
Fassil Ghebremichael, U.S. Air Force Academy (United States)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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