Liu Li,Wang Chang-wei,Jiang Yue-song.Effects of truncated Gaussian beam on the performance of fiber optical synthetic aperture system[J].Optoelectronics Letters,2012,8(3):216-219 Effects of truncated Gaussian beam on the performance of fiber optical synthetic aperture system Author Name Affiliation Liu Li  School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China  Wang Chang-wei  School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China  Jiang Yue-song  School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China  Abstract:       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 computed 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. Hits: 3848 Download times: 479 This work has been supported by the National High Technology Research and Development Program of China (No.2007AA12Z114) View Full Text    Download reader