405 nm pumped Ce~(3+)-doped silica fiber for broadband uorescence from cyan to red

摘要

A pure Ce-doped silica fiber is fabricated using modied chemical vapor deposition (MCVD) technique. Fluorescencecharacteristrics of a Ce-doped silica fiber are experimentally investigaed with continous wave pumpingfrom 440 nm to 405 nm. Best pump absorption and broad ourescence spectrum is observed for ~ 405 nm laser.Next, the detailed anaysis of spectral response as a function of pump power and fiber length is performed. Itis observed that a -10dB spectral width of ~ 280 mn can be easily achieved with different combinations of thefiber length and pump power. Lastly, we present, for the first time to the best of our knowledge, a broadbanduorescence spectrum with -10dB spectral width of 301 nm, spanning from ~ 517.36 nm to ~ 818 nm, from suchfibers with non-UV pump lasers.