Fig. 1. Coefficients of spectral attenuation characterizing matrix for G.652 fibre in ITU-T G.650.1 (2018)

Fig. 2. Coefficients of spectral attenuation characterizing matrix for G.652.D fibre in ITU-T G.650.1 (2020)

Fig. 3. Comparation of spectral attenuations calculated from loss source accumulation and characterizing matrix

Fig. 4. Differences of spectral attenuations calculated from loss source accumulation and characterizing matrix

Fig. 5. Differences of tested spectral attenuations and spectral attenuations predicted by matrix (1 000 samples)

Fig. 6. Mean values of differences of tested spectral attenuations and the two methods (1 000 samples)

Fig. 7. Differences of tested spectral attenuations and accumulations of loss sources α_R、α_OH and α_IR (1 000 samples)

Fig. 8. Statistical characteristics of α_{GeOH 1 445}

Fig. 9. Matrix vectors M″ corresponding to loss sources

Fig. 10. Coefficients of matrix M′ based on loss sources

Fig. 11. Mean values of differences of tested spectral attenuations and spectral attenuations predicted by matrix M、M′ and M₂ (1 000 samples)