“…Detailed knowledge of the physical properties, particularly electronic, and internal structure of these glasses is critical if they are to be used in all-optical switches. The present study concerns glasses of the lead-silicate family, which have been the subject of several recent experimental and theoretical studies [1][2][3][4][5][6][7][8][9][10][11][12][13]. Previous studies have presented two differing views on the nature of the glass structure as a function of lead concentration.…”