SPECTROSCOPIC PROPERTIES OF ERBIUM-DOPED SILICA GLASSES OBTAINED BY SOL-GEL METHOD

The spectroscopic properties of erbium doped silica glasses obtained b y sol-gel technology have been investigated. The emission properties o f Er3+ ion are discussed on a basis of the absorption and emission spe ctra. The transmission and emission characteristics of Er doped silica fibers are presented. The efficient emission in the mid-ir region (at 1.55 mu m) was observed. it has been found that, for the high concent ration (1000 ppm) Er doped fiber, the 1.55 mu m emission was completel y quenched. Instead of this emission, the efficient green anti-Stokes emission (after laser diode pumping at 980 nm) was observed. (C) 1998 Elsevier Science S.A.