TeO/sub 2/-based glasses containing Nb/sub 2/O/sub 5/, TiO/sub 2/, and WO/sub 3/ for discrete Raman fiber amplification

We describe a highly stable glass family based on the combination of TeO/sub 2/ with heavy metal-oxides of Nb, Ti, W. We show that these glasses have large Raman gain, a broad Raman spectrum, and large negative dispersion. They are, thus, potentially useful in a variety of specialty fiber applications, such as discrete Raman amplification.