title: Multiple visible emissions by means of up-conversion process in a microstructured tellurite glass optical fiber.
abstract: We present a microstructured fiber whose 9 µm diameter core consists in three concentric rings made of three active glasses having different rare earth oxide dopants, Yb3+/Er3+, Yb3+/Tm3+ and Yb3+/Pr3+, respectively. Morphological and optical characterization of the optical fiber are presented. The photoluminescence spectrum is investigated for different pumping conditions using a commercial 980 nm laser diode. Tuning of the RGB (or white light) emission is demonstrated not only by adjusting the pump power but also by using an optical iris as spatial filter which, thanks to the microstructured core, also acts as a spectral filter.
authors.affiliation: PhotonLab, Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 2410129, Torino, Italy. nadia.boetti@polito.it
authors.forename: Nadia G
authors.initials: NG
authors.lastname: Boetti
authors.forename: Joris
authors.initials: J
authors.lastname: Lousteau
authors.forename: Davide
authors.initials: D
authors.lastname: Negro
authors.forename: Emanuele
authors.initials: E
authors.lastname: Mura
authors.forename: Gerardo
authors.initials: G
authors.lastname: Scarpignato
authors.forename: Silvio
authors.initials: S
authors.lastname: Abrate
authors.forename: Daniel
authors.initials: D
authors.lastname: Milanese
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D005898:Glass / Q000737:chemistry*; D008029:Lighting / Q000295:instrumentation*; D008422:Materials Testing; D008904:Miniaturization; D013691:Tellurium / Q000737:chemistry*
chemical_list: C026660:tellurous acid; D013691:Tellurium