Abstract
The feasibility of direct laser diode pumping of Bi-doped fiber lasers at the wavelengths of 915 and was examined by measuring excited state absorption in Bi-doped silicate fibers for the wavelength range of . When the Bi-doped fibers were pumped at a strong excited state absorption was found at 915 and , whereas no significant excited state absorption was observed in the pumping band nor in the emission band, , of Bi-doped fiber lasers.
© 2009 Optical Society of America
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