Ultra-broadband mid-infrared emission from a Pr 3+ /Dy 3+ co-doped selenide-chalcogenide glass fiber spectrally shaped by varying the pumping arrangement [Invited]

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 1.32 µm, 1.511 µm and 1.7 µm. The results obtained show that the Pr3+/Dy3+ ion co-doped selenide-chalcogenide multimode fiber emits photoluminescence spanning from 2 µm to 6 µm. 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.