Heavily Yb-doped silicate glass thick films
A series of Yb-doped glass films has been prepared by sol–gel processing within the SiO2–Al2O3–P2O5–Yb2O3 system with doping levels up to 30 mol% Yb on a cation basis, with a thickness up to ~36 μm. The refractive indices at 633 nm, measured by spectroscopic ellipsometry, varied between 1.457 and 1.577, depending on the composition. Infrared (IR) and Raman spectroscopies were used to establish the main structural features of the different compositions, which included the presence of mixed Si–O–Al bonds evidenced by a IR peak at 940 cm−1, as well as P=O bonds revealed by a Raman peak at 1326 cm−1. The photoluminescence spectrum of Yb3+ ions was dominated by peaks at 987 and 1020 nm, with a lifetime between ~0.5–1.0 ms.
KeywordsSol–gel Aluminosilicate films Phosphosilicate films Yb doping
- 2.Hönninger C, Paschotta R, Graf M, Morier-Genoud F, Zhang G, Moser M, Biswal S, Nees J, Braun A, Mouroun GA, Johannsen I, Giesen A, Seeber W, Keller U (1999) Ultrafast ytterbium-doped bulk lasers and laser amplifiers. Appl Phys B Lasers Opt 69(1):3–17. doi:10.1007/s003400050762 CrossRefGoogle Scholar
- 8.Danger T, Mix E, Heumann E, Huber G, Ehrt D, Seeber W (1996), Diode pumped continuous-wave Yb laser in fluoride phosphate glasses, advanced solid-state lasers topical meeting, San Francisco, USA. In: Proceedings of the trends in optics and photonics/TOP’s, vol 1, p 23Google Scholar
- 18.Almeida RM, Marques AC (2005) Characterization of sol–gel materials by infrared spectroscopy. In: Sakka S (ed) Handbook of sol–gel science and technology: processing, characterization and applications, vol II: Characterization and properties of sol–gel materials and products. Kluwer Academic Publishers, Boston, MA, pp 65–90Google Scholar
- 21.Santos LF, Almeida RM (2009) Vibrational spectra and alkali ion motions in binary silicate glasses. Phys Chem Glasses: Eur J Glass Sci Technol, Part B 50(1):41–44Google Scholar