22 August 2014 HALOS: fast, autonomous, holographic adaptive optics
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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.
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Geoff P. Andersen, Geoff P. Andersen, Paul Gelsinger-Austin, Paul Gelsinger-Austin, Ravi Gaddipati, Ravi Gaddipati, Phani Gaddipati, Phani Gaddipati, Fassil Ghebremichael, Fassil Ghebremichael, } "HALOS: fast, autonomous, holographic adaptive optics", Proc. SPIE 9148, Adaptive Optics Systems IV, 91485S (22 August 2014); doi: 10.1117/12.2054444; https://doi.org/10.1117/12.2054444
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