Enhanced Raman gain coefficients and bandwidths in P_2O_5 and WO_3 added tellurite glasses for Raman gain media

摘要

The Raman gain coefficient and bandwidth of tellurite glasses have been tailored by systematically adding WO_3 and P_2O_5 in a TeO_2-BaO-SrO-Nb_2O_5 glass system. The Raman gain coefficients of the resultant glasses were obtained from spontaneous Raman scattering experiments using a 633 nm laser. The glasses developed here showed the widest gain bandwidths so far achieved in tellurite glasses while maintaining higher gain coefficients. The gain bandwidths of these glasses were more than twice that of a conventional tellurite-based glass and 70% larger than that of the silica glass.