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 10kHz without a computer in the loop.
© 2014 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
A. Polo, A. Haber, S. F. Pereira, M. Verhaegen, and H. P. Urbach
Opt. Express 20(25) 27922-27932 (2012)
Kainan Yao, Jianli Wang, Xinyue Liu, Xudong Lin, and Lu Chen
Appl. Opt. 56(23) 6639-6648 (2017)
Opt. Express 25(7) 8115-8122 (2017)