Rayleigh laser guide stars in multiconjugate correction

Jixiang Yan; Yu Xin; Changning Zhou

doi:10.1117/12.549405

25 October 2004 Rayleigh laser guide stars in multiconjugate correction

Jixiang Yan, Yu Xin, Changning Zhou

Proceedings Volume 5490, Advancements in Adaptive Optics; (2004) https://doi.org/10.1117/12.549405
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

Recently, the progress in adaptive optics makes the cone effect of Rayleigh laser guide stars be solved fairly. So that the applications of this kind of beacon in adaptive optics, especially in multiconjugate adaptive optics (MCAO) presents a bright future once again. The photon flux density required by the wavefront sensor of MCAO with certain performance is proportional to the number of layers. This results in that the laser energy required by guide stars for "classical" MCAO is very high. In the "new concept" MCAO, however, the Rayleigh beacons are formed by light scattered from whole higher atmosphere but not only a selected thin layer. Then the required laser energy degrades greatly.

Citation Download Citation

Jixiang Yan, Yu Xin, and Changning Zhou "Rayleigh laser guide stars in multiconjugate correction", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); https://doi.org/10.1117/12.549405

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