In-Fiber Generation of 1500-nm Signals for Optical Fiber Communication and Sensing Applications

This communication presents the first report of in-fiber generation of 1500-nm signals in silica optical fibers, particularly random hole optical fibers. This was achieved by incorporating specially designed 1500-nm emitting lead sulfide quantum dots (QDs) within the microstructural holes in the fiber´s cladding region. The QDs in the cladding were excited by the evanescent wave of the 632.8-nm pump light propagating in the fiber´s core. And, subsequently, their infrared emission was captured by the same fiber´s core as demonstrated by the spectral measurements.