Laser guide star in the form of crossed lines: additional capabilities

Yuri G. Serezhkin; Alexander I. Yakovlev

doi:10.1117/12.390331

7 July 2000 Laser guide star in the form of crossed lines: additional capabilities

Yuri G. Serezhkin, Alexander I. Yakovlev

Proceedings Volume 4007, Adaptive Optical Systems Technology; (2000) https://doi.org/10.1117/12.390331
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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.

Citation Download Citation

Yuri G. Serezhkin and Alexander I. Yakovlev "Laser guide star in the form of crossed lines: additional capabilities", Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); https://doi.org/10.1117/12.390331

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