Open AccessFast, 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.