Open AccessSuperbroadband near-infrared emission in Tm-Bi codoped sodium-germanium-gallate glasses
Author(s) -
Bo Zhou,
Hai Lin,
Chi Hou Chan,
Edwin Yue-Bun Pun
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.006514
Subject(s) - materials science , thulium , bismuth , germanium , gallate , luminescence , infrared , ion , optics , phosphor , photon upconversion , optoelectronics , analytical chemistry (journal) , doping , chemistry , nuclear chemistry , silicon , physics , organic chemistry , metallurgy , chromatography
Superbroadband emission from 1.0 to 1.7 μm wavelength was observed in thulium-bismuth (Tm-Bi) codoped sodium-germanium-gallate (NGG) glasses under 793 nm excitation. Efficient energy transfer process from Bi to Tm ions, with value as high as 67.7%, was achieved which is beneficial in achieving flat broadband lineshape. The large stimulated emission cross-section and measured lifetime confirm the potentials of Tm-Bi codopants as luminescence sources for superbroadband near-infrared (NIR) optical amplifiers and tunable lasers. Planar optical waveguides were fabricated successfully in the codoped NGG glasses using K(+)-Na(+) ion-exchange process.