In this payer, the authors discuss optical properties of silica glass and f
ibers, both doped and non-doped, obtained by the sol-gel method. Transmissi
on and luminescence characteristics of glasses thus obtained were measured.
It was found that the 1.5 mu m emission was invoked in the fiber exposed t
o the 0.97 mu m excitation. (C) 1999 Elsevier Science B.V, All rights reser
ved.