Abstract
A kind of optical fiber doped with CdSe/ZnS quantum dot in low concentrations
was fabricated for preparing a fiber amplifier. The photoluminescence and
absorption spectra transmitted through the doped fiber were measured in different
doping concentrations and fiber lengths. Effects of the doping concentration
and fiber length on the spectra were investigated by the experiment. Compare
with the doping before, a red shift of the photoluminescence-peak wavelength
was observed after the doping. The red shift goes up with the increases of
doping concentration and fiber length in the concentration ranging from $(0.33\sim 2.5)\times 10^{ - 2}$ mg/mL and the fiber length from 1–20 cm. For the given excitation
intensity, the maximum PL-peak intensity is related to the fiber length, and
in the given fiber length, it is related to the doping concentration.
© 2009 IEEE
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