Simulations of continuous-wave sodium laser guide stars with polarization modulation at Larmor frequency

6533b7dafe1ef96bd126e988

RESEARCH PRODUCT

Simulations of continuous-wave sodium laser guide stars with polarization modulation at Larmor frequency

Domenico Bonaccini Calia Ronald Holzlöhner Dmitry Budker Felipe Pedreros Bustos S. M. Rochester Joschua Hellemeier

subject

Physics Larmor precession Brightness business.industry Physics::Optics Resonance Laser law.invention Optical pumping Laser guide star Optics law Physics::Space Physics Physics::Atomic and Molecular Clusters Continuous wave Physics::Atomic Physics business Circular polarization

description

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.

year	journal	country	edition	language
2018-07-17	Adaptive Optics Systems VI

https://doi.org/10.1117/12.2313694

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