Photovoltaic Receiver With Offset Waveguide for Laser Power Conversion

The patent applies local quality by creating a non-uniform refractive index distribution within the waveguide structure. The refractive index varies spatially to redirect and redistribute the laser beam's intensity profile, ensuring uniform light distribution across the photovoltaic cell surface. This local variation in optical properties transforms the non-uniform incident radiation into uniform illumination, resolving the contradiction between maintaining high voltage output and achieving efficient power conversion.

The patent employs parameter changes by utilizing a waveguide with spatially varying refractive index to transform the optical parameters of the incident laser beam. Instead of changing the electrical configuration (series connections or DC-DC conversion), the system optically transforms the non-uniform intensity profile into a uniform distribution that directly matches the photovoltaic cell's requirements. This single-cell approach with optical parameter transformation eliminates the need for complex multi-cell arrangements or power electronics.

The patent introduces the waveguide as an intermediary optical element between the laser transmission device and the photovoltaic cell. This intermediary structure with its specially designed non-uniform refractive index profile acts as a mediator that transforms the laser's non-uniform intensity distribution into a uniform pattern suitable for the photovoltaic cell. The waveguide mediates the optical interaction, allowing simple axial alignment while achieving the complex goal of uniform illumination and high conversion efficiency.