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题名:
Adaptive-optics compensation by distributed beacons for non-Kolmogorov turbulence
作者: Rao, CH; Jiang, WH; Ling, N
刊名: APPLIED OPTICS
出版日期: 2001-07-20
卷号: 40, 期号:21, 页码:3441-3449
文章类型: Article
英文摘要: In optical propagation through atmospheric turbulence, the performance of compensation with adaptive optics depends on a beacon's spatial distribution. With distributed beacons, the inefficiency of the modal correction, which is defined as the ratio of the anisoplanatic error of the jth mode and the Zernike-coefficient variance, is derived by use of the wave-front expansion on the Zernike polynomials for non-Kolmogorov turbulence. Numerical results are presented for laser beam propagation through constant turbulence with an offset point beacon and an on-axis uniform circular beacon. The results show that compensation for an on-axis uniform circular beacon is much more effective than that for an offset point beacon. The low-order modes are much more correlated than the higher-order modes. The larger the power-law exponent of the refractive-index power spectrum beta, the smaller the propagation path length L and the larger the diameter D of the telescope aperture, the more effective the compensation is. For a specific extended degree of beacon for which there are a maximum number of modes N-max to be corrected, only low-order-correction systems are useful. (C) 2001 Optical Society of America.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: STAR IMAGE MOTION ; WAVE-FRONT SENSOR ; ATMOSPHERIC-TURBULENCE ; ZERNIKE POLYNOMIALS ; GUIDE-STAR ; ANISOPLANATISM
收录类别: SCI
语种: 英语
WOS记录号: WOS:000169932100003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3485
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China

Recommended Citation:
Rao, CH,Jiang, WH,Ling, N. Adaptive-optics compensation by distributed beacons for non-Kolmogorov turbulence[J]. APPLIED OPTICS,2001,40(21):3441-3449.
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