7 July 2000 Laser guide star in the form of crossed lines: additional capabilities
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Abstract
The capabilities of making of a laser guide star in the form of the crossed lines produced by laser beams into high atmosphere are considered. It is shown, that there is some optimum distance (APEQ 1 km) between a telescope and lasers, at which one the requirements of excitation of a star are optimum. The requirements to energy and time responses of lasers are determined. The estimation of additional opportunities given a two dimensional spatial configuration of a laser guide star for neutralization of distortions, which are produced by atmosphere turbulence, is made. These capabilities are bound with that distortions produced by turbulence on a ray path hill up and downwards have different character and the processing can separate them. The future processing logic of the information should isolate inphase motions of separate regions of a linear LGS describing oscillations of a laser beam at distribution hill up and to reduce to minimum reaction of system correction of a wavefront on these oscillations. The analysis of capabilities of neutralization of an atmospheric turbulence at usage of two- dimensional laser guide star in adaptive optical systems consisting of two telescopes is made.
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Yuri G. Serezhkin, Yuri G. Serezhkin, Alexander I. Yakovlev, Alexander I. Yakovlev, } "Laser guide star in the form of crossed lines: additional capabilities", Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390331; https://doi.org/10.1117/12.390331
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