Up-conversion luminescence in germanate glass and double-clad optical fibre co-doped with Yb3+/Eu3+ ions

作者：Kochanowicz M^*; Zmojda J; Ragin T; Miluski P; Jelen P

来源：Opto-electronics Review, 2016, 24(3): 155-161.

DOI：10.1515/oere-2016-0015

• germanate glass
• co-doped with Yb3+/Eu3+
• optical fibre
• up-conversion luminescence

In the paper the analysis of up-conversion (UC) luminescence in 0.5Yb(2)O(3)/(0.25-1)Eu2O3 (mol.%) co-doped germanate glass and optical fibre has been investigated. Up-conversion emission of bands at 591, 616, 652, 701 nm to which correspond Eu3+: D-5(0) -> F-7(1), D-5(0) -> F-7(2), D-5(0) -> F-7(3), D-5(0) -> F-7(4) transitions, respectively was obtained as a result of cooperative energy transfer between Yb3+ and Eu3+ ions. The highest up-conversion emission (Yb3+ -> Eu3+ energy transfer efficiency eta = 24%) was obtained in 0.5Yb(2)O(3)/0.75Eu(2)O(3) co-doped glass. Comparison of up-conversion and down-conversion luminescence spectra of bulk glass, glass fibre and different length double-clad optical fibre (up to 5 m) showed subtle differences in shape of the spectrum. In comparison to down - conversion emission (lambda(exc) = 405 nm) main UC luminescence band is red-shifted by 2 nm and is characterized by 5 nm greater full - width half - maximum (FWHM).

• 出版日期2016-9