Fast, compact, autonomous holographic adaptive optics | Zendy

Geoff Andersen | Zendy; Paul Gelsinger-Austin | Zendy; Ravi Gaddipati | Zendy; Phani Gaddipati | Zendy; Fassil Ghebremichael | Zendy

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Fast, compact, autonomous holographic adaptive optics

Author(s) -

Geoff Andersen,

Paul Gelsinger-Austin,

Ravi Gaddipati,

Phani Gaddipati,

Fassil Ghebremichael

Publication year - 2014

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.009432

Subject(s) - deformable mirror , actuator , optics , adaptive optics , holography , breadboard , bandwidth (computing) , physics , photodiode , computer science , holographic interferometry , microelectromechanical systems , electronic engineering , artificial intelligence , optoelectronics , telecommunications , engineering

We present a closed-loop adaptive optics system based on a holographic sensing method. The system uses a multiplexed holographic recording of the response functions of each actuator in a deformable mirror. By comparing the output intensity measured in a pair of photodiodes, the absolute phase can be measured over each actuator location. From this a feedback correction signal is applied to the input beam without need for a computer. The sensing and correction is applied to each actuator in parallel, so the bandwidth is independent of the number of actuator. We demonstrate a breadboard system using a 32-actuator MEMS deformable mirror capable of operating at over 10 kHz without a computer in the loop.

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