Aperture averaging in multiple-input single-output free-space optical systems

作     者：Gokce, Muhsin C. Baykal, Yahya Kamacioglu, Canan Uysal, Murat 

作者机构：Cankaya Univ Dept Elect & Commun Engn TR-06790 Ankara Turkey Cankaya Univ Dept Elect Elect Engn TR-06790 Ankara Turkey Ozyegin Univ Dept Elect & Elect Engn TR-34794 Istanbul Turkey 

出 版 物：《OPTICAL ENGINEERING》 (光学工程)

年 卷 期：2015年第54卷第6期

页      面：066103-066103页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：Cankaya University Ozyegin University Tubitak [2211-C] 

主　　题：Multiple-input single-output systems free-space optical communication optical wave propagation power scintillation aperture averaging 

摘      要：Multiple-input single-output systems are employed in free-space optical links to mitigate the degrading effects of atmospheric turbulence. We formulate the power scintillation as a function of transmitter and receiver coordinates in the presence of weak atmospheric turbulence by using the extended Huygens Fresnel principle. Then the effect of the receiver aperture averaging is quantified. To get consistent results, parameters are chosen within the range of validity of the wave structure functions. Radial array beams and a Gaussian weighting aperture function are used at the transmitter and the receiver, respectively. It is observed that the power scintillation decreases when the source size, the ring radius, the receiver aperture radius, and the number of array beamlet increase. However, increasing the number of array beamlets to more than three seems to have negligible effect on the power scintillation. It is further observed that the aperture averaging effect is stronger when radial array beams are employed instead of a single Gaussian beam. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)