Effects of truncated Gaussian beam on the performance ol Fiber optical synthetic aperture system

In the fiber optical synthetic aperture （FOSA） system, the diffraction of the Gaussian beam limited by the aperture in exit pupil plane of fiber collimator is studied theoretically, and the axial and transverse irradiance distributions are obtained. The point spread function （PSF） and modulation tra...

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Published in光电子快报：英文版 Vol. 8; no. 3; pp. 216 - 219
Main Author 刘丽 王长伟 江月松
Format Journal Article
LanguageEnglish
Published 2012
Subjects
光纤光学
合成孔径
性能
截断系数
系统
衍射理论
高斯光束
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Summary:In the fiber optical synthetic aperture （FOSA） system, the diffraction of the Gaussian beam limited by the aperture in exit pupil plane of fiber collimator is studied theoretically, and the axial and transverse irradiance distributions are obtained. The point spread function （PSF） and modulation transfer function （MTF） of the truncated Gaussian beam array are com- puted numerically with different truncation factors. The results show that the diffraction of the truncated Gaussian beam array agrees with the uniform-beam Rayleigh diffraction when the truncation factor is less than 0.5, but little power is transmitted. The PSF and MTF are degraded, but more power can be contained when the truncation factor is larger. The selection of the truncation factor is a trade-off between the loss of transmission and the qualities of PSF and MTF in practical application.
Bibliography:LIU Li , WANG Chang-wei, JIANG Yue-song （ School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191 China）
12-1370/TN
In the fiber optical synthetic aperture （FOSA） system, the diffraction of the Gaussian beam limited by the aperture in exit pupil plane of fiber collimator is studied theoretically, and the axial and transverse irradiance distributions are obtained. The point spread function （PSF） and modulation transfer function （MTF） of the truncated Gaussian beam array are com- puted numerically with different truncation factors. The results show that the diffraction of the truncated Gaussian beam array agrees with the uniform-beam Rayleigh diffraction when the truncation factor is less than 0.5, but little power is transmitted. The PSF and MTF are degraded, but more power can be contained when the truncation factor is larger. The selection of the truncation factor is a trade-off between the loss of transmission and the qualities of PSF and MTF in practical application.
ISSN:1673-1905
1993-5013