ATMOSPHERIC-TURBULENCE COMPENSATION BY RESONANT OPTICAL BACKSCATTERING FROM THE SODIUM LAYER IN THE UPPER-ATMOSPHERE

被引:110
作者
HAPPER, W
MACDONALD, GJ
MAX, CE
DYSON, FJ
机构
[1] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093
[2] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA
[3] INST ADV STUDY,PRINCETON,NJ 08540
来源
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 1994年 / 11卷 / 01期
关键词
D O I
10.1364/JOSAA.11.000263
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A new concept is described for creating artificial beacons for atmospheric-turbulence compensation. A laser tuned to the sodium D-2 line is used to excite resonant optical backscattering from the sodium layer in the upper atmosphere. The performance of such a system is compared with that expected from artificial beacons based on Rayleigh scattering in the lower atmosphere. It is found that sodium scattering has a more favorable scaling to large-aperture systems. Applications to the compensation of ground-based astronomical telescopes for atmospheric turbulence are described.
引用
收藏
页码:263 / 276
页数:14
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