Comparison of pump-laser characteristics for producing a mesospheric sodium guidestar for adaptive optical systems on large-aperture telescopes
Comparison of pump-laser characteristics for producing a mesospheric sodium guidestar for adaptive optical systems on large-aperture telescopes
复制标题
用于大口径望远镜自适应光学系统的中间层钠导星的泵浦激光器特性比较
DOI：
10.1117/12.311918
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
P. Hillman
中科院分区：
文献类型：
--
作者：
J. Telle;P. Milonni;P. Hillman
我们比较了各种激光系统的有效性生产钠导星在中间层的大口径望远镜。我们讨论了两个应用程序在两个网站的要求：卫星成像在星火光学范围在阿尔伯克基，新墨西哥州（SI）和红外天文学在亚利桑那州图森市（IR）的斯图尔特天文台。SI可以使用采用瑞利和钠导星的混合系统或仅采用钠导星的系统。IR将仅使用钠引导星星。我们的结果是基于分析和计算，已经比较了5个不同的实验。我们比较的参数包括脉冲格式、极化、中心频率和带宽。红外天文学应用的功率要求足够低，最先进的激光技术可以满足这些要求。但卫星成像的应用是有问题的。所需的功率足够高，材料中的热光效应可能是一个问题。
We compare the effectiveness of various laser systems for producing a sodium guidestar in the mesosphere for large aperture telescopes. We discuss the requirements for two applications at two sites: satellite imaging at the Starfire Optical Range in Albuquerque, New Mexico (SI) and infrared astronomy at the Steward Observatory in Tucson, Arizona (IR). SI may use either a hybrid system employing a rayleigh and a sodium guidestar or a system employing only a sodium guidestar. IR will use only a sodium guide star. Our results are based on analysis and computation that have been compared to 5 different experiments. Parameters included in our comparison are pulse format, polarization, center frequency, and bandwidth. The infrared astronomy application power requirements are low enough that state of the art laser technology can meet them. But the satellite imaging application is problematic. Required powers are sufficiently high that thermo-optic effects in materials can be a problem.