Correcting the aero-optical aberration of the supersonic mixing layer with adaptive optics: concept validation

被引：18

作者：

Gao, Qiong ^{[1
]}

Jiang, Zongfu ^{[1
]}

Yi, Shihe ^{[2
]}

Xie, Wenke ^{[1
]}

Liao, Tianhe ^{[3
]}

机构：

[1] Natl Univ Def Technol, Coll Photon Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China

[2] Natl Univ Def Technol, Coll Aerosp & Mat Engn, Changsha 410073, Hunan, Peoples R China

[3] Informat & Engn Univ, Dept Math & Phys, Zhengzhou 45001, Henan, Peoples R China

来源：

APPLIED OPTICS | 2012年 / 51卷 / 17期

基金：

中国国家自然科学基金;

关键词：

DIFFERENCE; SIMULATIONS; TECHNOLOGY; SCHEMES;

D O I：

10.1364/AO.51.003922

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2012 Optical Society of America

引用

页码：3922 / 3929

页数：8

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