Abstract

We demonstrate a single-core multiply doped fiber that, when pumped with a single pump source of ~800 nm, emits a more than two-octaves-spanning fluorescence spectrum ranging from 365 to 2300 nm. The fiber preform is manufactured from granulated oxides, and the core is doped with five different rare earths. At a pump power of 250 mW the total emitted power is 34 μW; given a core diameter of 6.5 μm and a numerical aperture of 0.1, the radiance exceeds 3 kW sr−1cm−2. We also demonstrate direct diode pumping of the fiber.

© 2008 Optical Society of America

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