Enhanced emission from a PbSe/CdSe core/shell quantum dot-doped optical fiber

The optical properties of optical fibers doped with different sizes of PbSe/CdSe core/shell quantum dots (QDs) were theoretically investigated as a function of fiber length, fiber diameter, QD concentration, and pump power. PbSe/CdSe core/shell QD material was confirmed to be a better candidate for the fiber dopant due to enhanced fiber output spectral intensity compared with the performance of plain PbSe QDs. Besides, the stronger size effect depending on fiber size and QD size, and a more obvious Auger recombination effect depending on pump power, were observed for PbSe/CdSe core/shell QD-doped optical fibers. This paper demonstrates a useful method for the emission enhancement of QD-doped optical fibers.