Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes

doi:10.1016/j.optcom.2018.05.015

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	Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes
	Liu, C.; Xu, H. Y.; Hu, L. F.; Cao, Z. L.
	2018
发表期刊	Optics Communications
ISSN	0030-4018
卷号	426 页码:23-29
摘要	Adaptive optics systems (AOSs) rely on good estimation of a distorted wavefront. Two problems make centroid detection difficult, namely, the problem of a relatively large subaperture that brings high-order aberrations and that of a large laser guide-star spot that brings in a large photon noise. To solve these problems, we proposed an estimation method based on Poisson statistics to reduce the photon noise, and the high-order aberrations are partly separated from a spot image to well estimate the slope in the subaperture. Simulation results indicate that our method performs better than the weighted center-of-gravity (WCOG) method and correlation method (CM). Under the condition of SNR =20 and r(o) = 13cm The root-mean-square values of the residual wavefront using the proposed method are approximately 10%, 50%, and 35% lower than those of the COG, WCOG, and CM, respectively. The proposed method would be highly beneficial for ground-based astronomical AO systems intended to provide moderate to high Strehl ratios at near infrared wavelengths on larger than 10m-aperture telescopes.
关键词	Optics
DOI	10.1016/j.optcom.2018.05.015
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/61055
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Liu, C.,Xu, H. Y.,Hu, L. F.,et al. Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes[J]. Optics Communications,2018,426:23-29.
APA	Liu, C.,Xu, H. Y.,Hu, L. F.,&Cao, Z. L..(2018).Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes.Optics Communications,426,23-29.
MLA	Liu, C.,et al."Method of reducing photon noise and turbulence for laser guide-star detection on large-aperture telescopes".Optics Communications 426(2018):23-29.

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