title: Superbroadband near-infrared emission in Tm-Bi codoped sodium-germanium-gallate glasses.
abstract: 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.
authors: Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong, China.
authors: Bo
authors: B
authors: Zhou
authors: Hai
authors: H
authors: Lin
authors: Baojie
authors: B
authors: Chen
authors: Edwin Yue-Bun
authors: EY
authors: Pun
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005898:Glass / Q000737:chemistry*; D007259:Infrared Rays; D007834:Lasers; D008029:Lighting / Q000295:instrumentation*