Oermann, M.Ebendorff-Heidepriem, H.Li, Y.Monro, T.2009-10-272009-10-272008Proceedings of OECC/ACOFT 2008 Conference : Joint Conference of the Opto-Electronics and Communications Conference and the Australian Conference on Optical Fibre Technology (2008 : Sydney, Australia)9780858258075http://hdl.handle.net/2440/51472We study the spectroscopic properties of erbium doped tellurite glass and the effect of co-doping with lanthanum. This is a route towards the development of versatile fibre lasers for the mid-infrared.enConference paper002009612310.1109/OECCACOFT.2008.46105162-s2.0-5404910240535287Ebendorff-Heidepriem, H. [0000-0002-4877-7770]