{"title":"Laser Linewidth Effect on Sodium Laser Guide Star Brightness in Midlatitude Atmosphere","authors":"L. A. Bolbasova, S. A. Ermakov, V. P. Lukin","doi":"10.1134/S1024856024701185","DOIUrl":null,"url":null,"abstract":"<p>Laser guide stars (LGS) technique is an integral part of modern adaptive optics systems of ground-based telescopes. The requirements for the energy, spectral, and spatiotemporal characteristics of a laser beam for creating a sodium LGS and for an adaptive optics system as a whole are largely related to the atmospheric parameters of a telescope site. A way of optimizing the brightness of a sodium LGS is the choice of laser linewidth. In this work, the effect of laser radiation linewidth (from 10 MHz to 3.5 GHz) on the magnitude of the return photon flux from a sodium LGS is estimated based on numerical simulation of the interaction of circularly polarized laser radiation with mesospheric sodium atoms in midlatitude atmosphere in the Russian Federation. The results can be used for the design of adaptive optics systems operating by the signals from a LGS.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 6","pages":"919 - 924"},"PeriodicalIF":0.9000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric and Oceanic Optics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1024856024701185","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Laser guide stars (LGS) technique is an integral part of modern adaptive optics systems of ground-based telescopes. The requirements for the energy, spectral, and spatiotemporal characteristics of a laser beam for creating a sodium LGS and for an adaptive optics system as a whole are largely related to the atmospheric parameters of a telescope site. A way of optimizing the brightness of a sodium LGS is the choice of laser linewidth. In this work, the effect of laser radiation linewidth (from 10 MHz to 3.5 GHz) on the magnitude of the return photon flux from a sodium LGS is estimated based on numerical simulation of the interaction of circularly polarized laser radiation with mesospheric sodium atoms in midlatitude atmosphere in the Russian Federation. The results can be used for the design of adaptive optics systems operating by the signals from a LGS.
期刊介绍：
Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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