Abstract

We report an efficient glass-ceramic fiber laser and show that its slope efficiency (~30%) is not compromised by the presence of Nd-doped fluoride crystals embedded within the core of the single-mode optical fiber. In contrast, the spectroscopy (fluorescence and gain spectrum) of the Nd<sup>3+</sup> ions is dramatically changed by the ceramming process, an indication of strong partitioning of the rare-earth ions into the CdF<sub>2</sub>:PbF<sub>2</sub>:YF<sub>3</sub> crystal environment. The enormous potential for a new range of optical devices based on transparent glass-ceramic materials is highlighted.

© 2001 Optical Society of America

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