Plane wave coupling into single-mode fiber in the presence of random angular jitter

Efficient coupling of coherent plane waves into single-mode fibers is a key technology for free-space optical communication at 1550 nm. Here we deal with the influence of random angular jitter on a plane wave to single-mode fiber coupling. The expression of mean-coupling efficiency in the presence of random jitter is handled in the pupil plane. First, an analytical expression of the mean-coupling efficiency is derived for the zero bias error case. Then the bias error was taken into account. By minimizing the coupling efficiency penalty, the optimum value of design parameter ß of fiber-coupled optical systems in the presence of random jitter is obtained. The results obtained here will be useful in facilitating parametricestimation and optimization of fiber-coupled optical systems.