We describe an adaptive optics (AO) system for correcting the aero-optical aberration of the supersonic mixing layer and test its performance with numerical simulations. The AO system is based on the measurement of distributed Strehl ratios and the stochastic parallel gradient descent (SPGD) algorithm. The aero-optical aberration is computed by the direct numerical simulation of a two-dimensional supersonic mixing layer. When the SPGD algorithm is applied directly, the AO cannot give effective corrections. This paper suggests two strategies to improve the performance of the SPGD algorithm for use in aero-optics. The first one is using an iteration process keeping finite memory, and the second is based on the frozen hypothesis. With these modifications, the performance of AO is improved and the aero-optical aberration can be corrected to some noticeable extent. The possibility of experimental implementation is also discussed.
© 2012 Optical Society of America
Atmospheric and Oceanic Optics
Original Manuscript: December 19, 2011
Revised Manuscript: March 29, 2012
Manuscript Accepted: April 2, 2012
Published: June 8, 2012
Qiong Gao, Zongfu Jiang, Shihe Yi, Wenke Xie, and Tianhe Liao, "Correcting the aero-optical aberration of the supersonic mixing layer with adaptive optics: concept validation," Appl. Opt. 51, 3922-3929 (2012)