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Proceedings Article

Update on the TMT laser guide star facility design

[+] Author Affiliations
Corinne Boyer, Brent Ellerbroek

TMT Observatory Corp. (USA)

Mike Gedig

Empire Dynamic Structures (Canada)

Edward Hileman, Richard Joyce, Ming Liang

National Optical Astronomy Observatory (USA)

Proc. SPIE 7015, Adaptive Optics Systems, 70152N (July 10, 2008); doi:10.1117/12.787603
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From Conference Volume 7015

  • Adaptive Optics Systems
  • Norbert Hubin; Claire E. Max; Peter L. Wizinowich
  • Marseille, France | June 23, 2008

abstract

The Thirty Meter Telescope (TMT) will implement a Laser Guide Star Facility (LGSF), which will generate up to nine Na laser beams in at least four distinct asterisms. The TMT LGSF conceptual design is based upon three 50W solid state, continuous wave, sum frequency 589 nm lasers and conventional beam transport optics. In this paper, we provide an update to the TMT LGSF conceptual design. The LGSF top end and the beam transfer optics have been significantly redesigned to compensate for the TMT telescope top end flexure, to adapt for the new TMT Ritchey-Chretien optical design, to reduce the number of optical surfaces and to reduce the mass and volume. Finally, the laser service enclosure has been relocated within the telescope azimuth structure. This will permit the lasers to operate with a fixed gravity vector, but also requires further changes in the beam transport optical path.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Corinne Boyer ; Brent Ellerbroek ; Mike Gedig ; Edward Hileman ; Richard Joyce, et al.
"Update on the TMT laser guide star facility design", Proc. SPIE 7015, Adaptive Optics Systems, 70152N (July 10, 2008); doi:10.1117/12.787603; http://dx.doi.org/10.1117/12.787603


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