56 citations · 77 across the 9 of their papers we have counts for
4 papers · 1 filter
Can amplified spontaneous emission produce intense laser guide stars for adaptive optics?
P. Hickson, J. Hellemeier, R. Yang
Adaptive optics (AO) is a key technology for ground-based optical and infrared astronomy, providing high angular resolution and sensitivity. AO systems employing laser guide stars…
Atomic transitions for adaptive optics
Rui Yang, Joschua Hellemeier, Paul Hickson
This paper reviews atoms and ions in the upper atmosphere, including the mesospheric metals Na, Fe, Mg, Si, Ca, K and also non-metallic species N, N, O, H, consider…
Measuring line-of-sight sodium density structure using laser guide stars
Joschua A. Hellemeier, Domenico Bonaccini Calia, Paul Hickson +2
The performance of adaptive optics systems employing sodium laser guide stars can be improved by continuously monitoring the vertical density structure of mesospheric sodium along…
Frequency chirped continuous-wave sodium laser guide stars
F. Pedreros Bustos, R. Holzlöhner, S. Rochester +3
We numerically study a method to increase the photon return flux of continuous-wave laser guide stars using one-dimensional atomic cooling principles. The method relies on chirping…