Correction of crosstalk in output of fiber optic array in solar radiation measurements

In order to mitigate the measurement errors caused by the crosstalk in the output of the optical fiber array in the new solar radiation measurement method, this paper proposes a method that utilizes a non-spherical lens to eliminate the crosstalk and achieves effective crosstalk elimination through simulations and experiments based on relevant principles. Firstly, the analysis of the transmission principle of optical fibers is conducted to determine the causes and impacts of crosstalk in the output of the fiber array. Secondly, the imaging process of the non-spherical focusing lens is analyzed to understand its focusing effect on the divergent output beams of each individual unit. Subsequently, using Zemax, simulations are carried out to analyze the crosstalk elimination capability of the system under processing and assembly errors. Finally, based on the simulation results, a platform is constructed for testing to experimentally validate the capability of the non-spherical lens system to cleverly, simply, and real-time eliminate the output crosstalk of the fiber array, thereby enabling power calculation of any output beam.