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Experimental Investigation of Segmented Adaptive Optics for Spatial Laser Array in an Atmospheric Turbulence Condition
Author(s): Zheng, Y (Zheng, Yi); Wang, XH (Wang, Xiaohua); Deng, L (Deng, Li); Shen, F (Shen, Feng); Li, XY (Li, Xinyang)
Source: OPTICS COMMUNICATIONS Volume: 284 Issue: 20 Pages: 4975-4982 DOI: 10.1016/j.optcom.2011.06.057 Published: SEP 15 2011
Abstract: We describe a concept of using segmented adaptive optics (AO) to correct the higher-order wavefront aberrations (HOWAs) in an atmospheric turbulence condition. The effects of piston and tip-tilt corrections are analyzed by numerical simulation. An experiment test-bed is built for verification. Seven spatial beamlets are combined into a hexagonal array by use of a pyramid, and an active segmented mirror is used for phase modulation. The AO control is implemented by stochastic parallel gradient descent (SPGD) algorithm. Experimentally, after segmented AO is enabled, the HOWA in warmed air environment has been effectively corrected and the peak intensity of far-field has been enhanced by 5 times. (C) 2011 Elsevier B.V. All rights reserved.
Addresses: [Zheng, Y; Wang, XH; Deng, L; Shen, F; Li, XY] Chinese Acad Sci, Lab Adapt Opt, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
[Zheng, Y; Wang, XH; Deng, L] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
Reprint Address: Zheng, Y (reprint author), Chinese Acad Sci, Lab Adapt Opt, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
E-mail Address: zhengyi_ioe@163.com
IDS Number: 816DP
Source: OPTICS COMMUNICATIONS Volume: 284 Issue: 20 Pages: 4975-4982 DOI: 10.1016/j.optcom.2011.06.057 Published: SEP 15 2011
Abstract: We describe a concept of using segmented adaptive optics (AO) to correct the higher-order wavefront aberrations (HOWAs) in an atmospheric turbulence condition. The effects of piston and tip-tilt corrections are analyzed by numerical simulation. An experiment test-bed is built for verification. Seven spatial beamlets are combined into a hexagonal array by use of a pyramid, and an active segmented mirror is used for phase modulation. The AO control is implemented by stochastic parallel gradient descent (SPGD) algorithm. Experimentally, after segmented AO is enabled, the HOWA in warmed air environment has been effectively corrected and the peak intensity of far-field has been enhanced by 5 times. (C) 2011 Elsevier B.V. All rights reserved.
Addresses: [Zheng, Y; Wang, XH; Deng, L; Shen, F; Li, XY] Chinese Acad Sci, Lab Adapt Opt, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
[Zheng, Y; Wang, XH; Deng, L] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
Reprint Address: Zheng, Y (reprint author), Chinese Acad Sci, Lab Adapt Opt, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
E-mail Address: zhengyi_ioe@163.com
IDS Number: 816DP
