8 March 2017 Effects of atmospheric turbulence on the return photon flux of sodium laser guide star
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Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102553S (2017) https://doi.org/10.1117/12.2267964
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China
Abstract
The circular-polarized laser can excite Sodium Laser Guide Star (SLGS) to obtain a large number of the return photons. Re-pumping technology can further enhance the return photon flux of SLGS. But laser propagating in the atmosphere suffers the atmospheric turbulence which causes the stochastic distributions of laser intensity in mesosphere. This leads to the fluctuations of return photon flux as the strength of atmospheric turbulence. We study effects of atmospheric turbulence on the return photon flux of SLGS under the Hufnagle-vally5/7(HV5/7), Greenwood and Mod-HV models by numerical simulation. Results show that both the return photon flux and fluctuations under the strong atmospheric turbulence are more than those under the weak one. Comparing re-pumping with no re-pumping, increment of the return photon flux under the three atmospheric turbulence models increase with the decreasing strength of atmospheric turbulence. But the fluctuations of the return photon flux greatly decrease for re-pumping.
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Xiangyuan Liu, Xiangyuan Liu, Xianmei Qian, Xianmei Qian, Chuanyu Fan, Chuanyu Fan, Chengtao Du, Chengtao Du, Chengling Lu, Chengling Lu, Lei Zhang, Lei Zhang, Huan Yang, Huan Yang, } "Effects of atmospheric turbulence on the return photon flux of sodium laser guide star", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102553S (8 March 2017); doi: 10.1117/12.2267964; https://doi.org/10.1117/12.2267964
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