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Multiple visible emissions by means of up-conversion process in a microstructured tellurite glass optical fiber

2012; Optica Publishing Group; Volume: 20; Issue: 5 Linguagem: Inglês

10.1364/oe.20.005409

1094-4087

Nadia G. Boetti, Joris Lousteau, Davide Negro, Emanuele Mura, Gerardo Cristian Scarpignato, S. Abrate, Daniel Milanese,

Photonic Crystal and Fiber Optics

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.