Abstract

The feasibility of direct laser diode pumping of Bi-doped fiber lasers at the wavelengths of 915 and 975nm was examined by measuring excited state absorption in Bi-doped silicate fibers for the wavelength range of 9001250nm. When the Bi-doped fibers were pumped at 1047nm a strong excited state absorption was found at 915 and 975nm, whereas no significant excited state absorption was observed in the 1080nm pumping band nor in the emission band, 1160nm, of Bi-doped fiber lasers.

© 2009 Optical Society of America

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