Nd3+/Yb3+Doped Phosphate and Antimony Glasses for Optical Fibre Source

In the article there are presented two different series of glass: fluorophosphate with molar composition: 65P 2 O 5 -8Al 2 O 3 -2BaO-5BaF 2 -6ZnF 2 -5Na 2 O-6MgF 2 -3B 2 O 3 and antimony glasses 40Sb 2 O 3 -3Al 2 O 3 -57SiO 2 doped with Nd 3+ and Yb 3+ ions.Dopant contents influence efficient spatial overlapping of emission level for neodymium and absorption level for ytterbium was analyzed.While exciting the produced glasses with a laser diode (λ = 808 nm) a broad luminescence spectrum (∆λ = 100 nm) has been obtained in both cases in the vicinity of 1 µm, being the superposition of the following transitions: 4 F 3/2 → 4 I 11/2 for Nd 3+ and 2 F 5/2 → 2 F 7/2 for Yb 3+ .Based on the luminescence measurements the probability of non-radiative energy transfer was described.Because of a small difference in energy (≈ 1190 cm -1 ) between the laser levels of neodymium and ytterbium the resonant process of energy transfer has been obtained.