Artificial optical guidestars: prospects for extremely large telescopes

Computer Science – Performance

Scientific paper

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Scientific paper

This paper discusses the concept of employing artificial guide stars to correct atmospheric turbulence induced wavefront distortion for Extremely Large Telescopes (ELTs) conducting science observations at near IR and visible wavelengths. A set of generic laser guide star requirements for ELTs is established with the caveat that a community wide consensus on laser parameters would benefit the advancement of laser technology. Currently available laser guide star systems are examined in light of the requirements and their limitations referenced to the requirements are discussed. A short summary is provided of current research and development efforts to advance laser performance. Finally, a new concept is presented for generating very bright optical guidestars using high power microwaves to create, sustain, and move about the sky a high altitude, compact plasma.

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