Use of CsCl to Enhance the Glass Stability Range of Tellu rite Glasses for Er^sup 3+^-Doped Optical Fiber Drawing

Tellurite glasses are important as a host of ... ions because of their good solubility and because they present broadband optical gain compared with ...-doped silica, with the potential to increase the bandwidth of communication systems. However, the small glass stability range (GSR) of tellurite glasses compromises the quality of the optical fibers. We show that the addition of ... to tellurite glasses can increase their GSR, making it easier to draw good-quality optical fibers. ... acts like a network modifier in glass systems, weakening the network by forming Te-Cl bonds. We show that the thermal expansion coefficient mismatch is in the right direction for optical fiber fabrication purposes and that the ... content can be used to control the refractive index of clad and core glasses. Single-mode and multi-mode ...-doped optical fibers were produced by the rod-in-tube method using highly homogeneous ... glasses. (ProQuest-CSA LLC: ... denotes formulae/symbols omitted.)