Abstract

We report the fabrication of ytterbium (Yb)-sensitized thulium (Tm)-doped air-clad fibers for near-IR laser applications. The effect of change in the concentration ratio of Yb and Tm was studied using three such fibers, which were pumped with a 980nm laser diode and subsequently characterized to test their lasing properties. Lasing at around the 2μm wavelength was obtained using a simple cavity design, and improved performance was seen for increased YbTm ratio.

© 2011 Optical Society of America

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