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The concept of 微环级联四波混频, as a means of signal processing, involves the utilization of a series of interconnected micro-rings to mix four distinct frequencies. This technique is made possible through the use of the Fast Fourier Transform (FFT) algorithm, which allows for efficient computation of the resulting mixed signal. This method has been successfully implemented and tested in the MATLAB 2013b environment, demonstrating its potential for a wide range of practical applications in fields such as telecommunications and digital signal processing.