Power in the fiber for atmospheric turbulence-affected laser beams

The analysis of budget link and free space optical system performances requires the calculation of several metrics of the atmospheric turbulence-affected collected light. In this paper, assuming the collected light is focused into an optical fiber positioned in the focal plane, we use the ABCD ray-matrix representation to show the impact of Kolmogorov and non-Kolmogorov turbulence on the Power in the Fiber (PIF). Calculation of the PIF requires also the knowledge of the transmitted average power that enters the receiver aperture (power in the bucket) and the long-term beam spread in the focal plane.