Degradation of single-mode fiber coupling efficiency due to localized wavefront aberrations in free-space laser communications

摘要

Abstract. Coupling efficiency of coherent plane waves into single-modenfibers is degraded by the localized deformation of the optics antennanused for reception of optical beams. For transmission-type andnreflection-type antennas, the evolution of coupling efficiency with thenchange of characteristic parameters of the localized distortion are inves-ntigated. It is found that the coupling efficiency varies regularly as thenincrease of the normalized center deepness h/R, the normalized radiusna/R, and the normalized center distance d/R. The key principles fornselecting optics are determined. The results obtained will be useful innestimation and design of fiber-coupled optical systems in free-spacencommunications. © 2010 Society of Photo-Optical Instrumentation Engineers.nu0001DOI: 10.1117/1.3407427