Studies towards a directional polychromatic sodium laser guide star

Felipe Pedreros Bustos; Alexander Akulshin; Ronald Holzlöhner; Simon Rochester; Dmitry Budker

doi:10.1117/12.2313757

10 July 2018 Studies towards a directional polychromatic sodium laser guide star

Felipe Pedreros Bustos, Alexander Akulshin, Ronald Holzlöhner, Simon Rochester, Dmitry Budker

Proceedings Volume 10703, Adaptive Optics Systems VI; 107030R (2018) https://doi.org/10.1117/12.2313757
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

In this work we discuss a mechanism for generation of a coherent source of light from the mesosphere as a new concept of directional laser guide star. In contrast to the near-isotropic spontaneous emission, nonlinear processes in atomic vapors like amplified spontaneous emission can yield highly directional emission in the forward and backward directions. Along with directional emission, excited sodium atoms also radiate at different wavelength creating a polychromatic laser guide star (PLGS). If feasible, a directional PLGS would provide a net gain in the return flux of several orders of magnitude compared to traditional LGS schemes, making possible laser-guided tip/tilt-correction in adaptive optic systems.

Citation Download Citation

Felipe Pedreros Bustos, Alexander Akulshin, Ronald Holzlöhner, Simon Rochester, and Dmitry Budker "Studies towards a directional polychromatic sodium laser guide star", Proc. SPIE 10703, Adaptive Optics Systems VI, 107030R (10 July 2018); https://doi.org/10.1117/12.2313757

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