Photovoltaic Converter with Aperture Correction for Power-over-Fiber Systems

A device for aperture correction at the input of a photovoltaic converter (PPC) module for a power-over-fiber (PoF) system is designed in the form of a lens integrated with an optical fiber, which delivers laser radiation to the input of the PPC crystal. This component allows the beam divergence angle to be significantly increased, with the optimal value being obtained at the input of the PPC module. The lens optical fiber is used to reduce the length of the optical homogenizer, which consequently results in a reduction in the attenuation and mass-dimensional parameters of the entire PPC module. In this configuration, the radiation profile is aligned with the shape and dimensions of the converter crystal, ensuring uniform illumination of the crystal surface. The primary characteristics that impact the efficiency of the operation of the aperture correction device were investigated, including the aperture numerical value, focal length, radiation pattern, and light spot profile. The estimation of optimal parameters for the device used in the photovoltaic conversion module was carried out. The dependence diagrams of the aperture, focal length, and radiation profile on the radius of curvature of the microlens are given.