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DOI: 10.17586/1023-5086-2018-85-10-08-16
Analysis of aiming performance limitation for optical system in atmospheric turbulence
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Publication in Journal of Optical Technology
Xiaowei Ye, Feng Shen Analysis of aiming performance limitation for optical system in atmospheric turbulence (Анализ ограничений на точность сопровождения объекта оптическими системами в турбулентной атмосфере) [на англ. яз.] // Оптический журнал. 2018. Т. 85. № 10. С. 8–16. http://doi.org/10.17586/1023-5086-2018-85-10-08-16
Xiaowei Ye, Feng Shen Analysis of aiming performance limitation for optical system in atmospheric turbulence (Анализ ограничений на точность сопровождения объекта оптическими системами в турбулентной атмосфере) [in English] // Opticheskii Zhurnal. 2018. V. 85. № 10. P. 8–16. http://doi.org/10.17586/1023-5086-2018-85-10-08-16
Xiaowei Ye and Feng Shen, "Analysis of aiming performance limitation for an optical system in atmospheric turbulence," Journal of Optical Technology. 85(10), 603-609 (2018). https://doi.org/10.1364/JOT.85.000603
In optical system that transmitting laser beam through atmosphere by phase compensation with adaptive optics, the aiming performance depends on the method of wave-front tilt detection which can be divided into Zernike tilt detection and gradient tilt detection. A unified formulation for the both two methods is obtained to calculate the residual tilt angle jitter and tilt correction factor which are defined as the evaluation indexes of aiming performance. A parameter L0 named equivalent atmospheric coherence length is expressed as an integral over the structure constant profile of refraction index and is modulated by a modulation function which is determined by the ratio of offset distance to aperture. As a result, tilt correction factor can be briefed as (r0/L0)5/6, where r0 is the atmospheric coherence length. Simulations illustrate that the aiming performance of optical system based on gradient tilt detection is better than that of Zernike tilt detection under identical condition. For the systems of two types, aiming performance will be decreased as the increase of ratio of offset distance to aperture and the worsening of atmospheric condition.
laser communication, atmospheric turbulence, tilt detection method; equivalent atmospheric coherence length, tilt correction factor
Acknowledgements:OCIS codes: 060.4510, 010.1300, 030.7060
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