Performance evaluation of gratings applied by genetic algorithm for thereal-time optical interconnection,

摘要

Abstract: In this paper, gratings to apply for the optical interconnection are designed using a genetic algorithm (GA) for a robust and efficient schema. The real-time optical interconnection system architecture is composed with LC-SLM, CCD array detector, IBM-PC, He-Ne laser, and Fourier transform lens. A pixelated binary phase grating is displayed on LC-SLM and could interconnect incoming beams to desired output spots freely by real-time. So as to adapt a GA for finding near globally-cost solutions, a chromosome is coded as a binary integer of length 32 $MUL 32, the stochastic tournament method for decreasing the stochastic sampling error is performed, and a single-point crossover having 16 $MUL 16 block size is used. The characteristics on the several parameters are analyzed in the desired grating design. Firstly, as the analysis of the effect on the probability of crossover, a designed grating when the probability of crossover is 0.75 has a 74.7$LB@%$RB high diffraction efficiency and a 1.73 $MUL 10$+$MIN@1$/ uniformity quantitatively, where the probability of mutation is 0.001 and the population size is 300. Secondly, on the probability of mutation, a designed grating when the probability of mutation is 0.001 has a 74.4$LB@%$RB high efficiency and a 1.61 $MUL 10$+$MIN@1$/ uniformity quantitatively, where the probability of crossover is 1.0 and the population size is 300. Thirdly, on the population size, a designed grating when the population size is 300 and the generation is 400 has above 74$LB@%$RB diffraction efficiency, where the probability of mutation is 0.001 and the probability of crossover is 1.0. !6