Q-switched and Mode-locked fiber laser Based on Uracil doped DNA thin solid film saturable absorber

Abstract

Optical nonlinearity of uracil-doped DNA thin solid film was successfully discovered in the ultrafast regime. We fabricated an organic ring laser cavity using uracil-doped DNA thin film on side-polished fiber as a saturable absorber and erbium-doped fiber gain medium to produce stable mode-locked femtosecond pulse.