Abstract

Superbroadband near-infrared (NIR) emission covering 1250 to 1680nm wavelength has been obtained in praseodymium (Pr3+) singly doped bismuth gallate glasses. The emission originates from the G41H53 and D21G41 transitions at 1330 and 1490nm wavelengths, respectively, and is due to the extremely low phonon energy (690cm1) and the unique ligand field of the glasses. It is shown that the emission line shape can be modified by adjusting the Pr3+ concentration and the energy transfers involved. The results confirm that other than bismuth (Bi), chromium (Cr), nickel (Ni), and other chemical elements, Pr3+ singly doped system is a promising alternative in achieving superbroadband NIR emission.

© 2011 Optical Society of America

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