After analyzing the test results in Table 1, it can beconcluded that: With the gradual increase of noisedensity, the results of peak signal-to-noise ratio (PSNR)also changed differently under the interference signals ofGaussian, salt and pepper, and mixed noise. However, theresults of PSNR are all above 25 under the noise signalsof the three types, where the minimum value is 26.2 andthe maximum value is 29.7, which meets the applicationeffect. Therefore, the noise reduction effect of theproposed method is good and can reliably remove thenoise in the laser interface signal. Because the channelmodel of the optical fiber communication network is firstconstructed in this paper, the wavelet domain filteringalgorithm is used to reduce the noise in the channel andhighlight the signal characteristics. Thereby, the effect ofsignal removal is optimized.