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17 July 2018 Simulations of continuous-wave sodium laser guide stars with polarization modulation at Larmor frequency
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Abstract
The return flux from a sodium laser guide star suffers, at large angles between the geomagnetic field and the laser beam, from the reduction in optical pumping due to spin-precession of sodium atoms. This detrimental effect can be mitigated by modulating the circular polarization of a continuous-wave laser beam in resonance with the Larmor frequency of sodium atoms in the mesosphere. We present an investigation based on numerical modeling to evaluate the brightness enhancement of a laser guide star with polarization modulation of a continuous-wave laser beam at different observatories.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Felipe Pedreros Bustos, Ronald Holzlöhner, Simon Rochester, Domenico Bonaccini Calia, Joschua Hellemeier, and Dmitry Budker "Simulations of continuous-wave sodium laser guide stars with polarization modulation at Larmor frequency", Proc. SPIE 10703, Adaptive Optics Systems VI, 107033R (17 July 2018); https://doi.org/10.1117/12.2313694
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