  In this contribution, a comprehensive experimental study of photoluminescence
from Pr3+/Dy3+ co-doped selenide-chalcogenide multimode fiber samples is
discussed. The selenide-chalcogenide multimode fiber samples co-doped with 500
ppm of Pr3+ ions and 500 ppm of Dy3+ ions are prepared using conventional
melt-quenching. The main objective of the study is the analysis of the pumping
wavelength selection on the shape of the output spectrum. For this purpose, the
Pr3+/Dy3+ co-doped selenide-chalcogenide multimode fiber samples are
illuminated at one end using pump lasers operating at the wavelengths of 1320
nm , 1511 nm and 1700 nm. The results obtained show that the Pr3+/Dy3+ ion
co-doped selenide-chalcogenide multimode fiber emits photoluminescence spanning
from 2000 nm to 6000 nm. Also it is demonstrated that, by varying the output
power and wavelength of the pump sources, the spectral shape of the emitted
luminescence can be modified to either reduce or enhance the contribution of
radiation within a particular wavelength band. The presented results confirm
that Pr3+/Dy3+ co-doped selenide-chalcogenide multimode fiber is a good
candidate for the realization of broadband spontaneous emission fiber sources
with shaped output spectrum for the mid-infrared wavelength region.
