Abstract:
We report the preparation of a high-purity optical-quality four-component glass of composition 68TeO2 — 22WO3 — 8La2O3 — 2Bi2O3, containing (2.7±0.5)×10-5 mol % OH groups. Its refractive index has been determined in the range 0.9 — 5.45 μm using interference refractometry. The data are used to assess the dispersion and guidance characteristics of microstructured optical fibres potentially attractive for supercontinuum generation in the range 1 — 5 μm