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	A novel wavefront sensing technique for high speed atmospheric measurement based on digital micromirror device
	Yang Ping; Wang Shuai; Ao Mingwu; Xu Bing
	2011
会议名称	Proceedings of SPIE - The International Society for Optical Engineering, v 8178, 2011, Optics in Atmospheric Propagation and Adaptive Systems XIV
会议日期	2011
卷号	8178
通讯作者	Yang Ping
中文摘要	We propose a novel wavefront sensing technique based on binary-aberration-mode filtering and detection. Rather than Zernike polynomials, the orthogonal binary two-dimensional Walsh functions are transferred to circular mode-fieldfitted Walsh functions and used as binary aberration modes to expand the wavefront. A Digital Micromirror Device (DMD) is employed as an intensity spatial light modulator (SLM). It generates each of the intensity modulation patterns prescribed by the mode-field-fitted Walsh functions to modulate the intensity of the incident beam before it is focused to impinge on a single-mode optical fiber. The single-mode optical fiber, as a spatial mode filter, supports only fundamental binary aberration mode. A detector collects the amount of the intensity after each modulation. By building the relationship with the intensity, the binary-aberration-mode coefficients can be calculated. This technique turns the complex two-dimensional wavefront sensing into simple intensity detection. Therefore, many limitations, such as low response frequency and weak far-infrared detection capability of most photosensor arrays can be easily eliminated just by adopting a photosensor such as a photodiode. Thus, this technique is especially suitable for weak and far-infrared light detection. The numerical simulation demonstrates that the wavefront reconstruction with the binary aberration modes is reliable and the technique can easily meet the demands of high speed atmospheric measurements and has a promising application in atmospheric fields.
英文摘要	We propose a novel wavefront sensing technique based on binary-aberration-mode filtering and detection. Rather than Zernike polynomials, the orthogonal binary two-dimensional Walsh functions are transferred to circular mode-fieldfitted Walsh functions and used as binary aberration modes to expand the wavefront. A Digital Micromirror Device (DMD) is employed as an intensity spatial light modulator (SLM). It generates each of the intensity modulation patterns prescribed by the mode-field-fitted Walsh functions to modulate the intensity of the incident beam before it is focused to impinge on a single-mode optical fiber. The single-mode optical fiber, as a spatial mode filter, supports only fundamental binary aberration mode. A detector collects the amount of the intensity after each modulation. By building the relationship with the intensity, the binary-aberration-mode coefficients can be calculated. This technique turns the complex two-dimensional wavefront sensing into simple intensity detection. Therefore, many limitations, such as low response frequency and weak far-infrared detection capability of most photosensor arrays can be easily eliminated just by adopting a photosensor such as a photodiode. Thus, this technique is especially suitable for weak and far-infrared light detection. The numerical simulation demonstrates that the wavefront reconstruction with the binary aberration modes is reliable and the technique can easily meet the demands of high speed atmospheric measurements and has a promising application in atmospheric fields.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.ioe.ac.cn/handle/181551/7755]
专题	光电技术研究所_自适应光学技术研究室（八室）
作者单位	中国科学院光电技术研究所
推荐引用方式 GB/T 7714	Yang Ping,Wang Shuai,Ao Mingwu,et al. A novel wavefront sensing technique for high speed atmospheric measurement based on digital micromirror device[C]. 见:Proceedings of SPIE - The International Society for Optical Engineering, v 8178, 2011, Optics in Atmospheric Propagation and Adaptive Systems XIV. 2011.

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