Tunable L-band Mode-Locked Bi-EDF fiber laser based on chirped fiber Bragg grating

Abstract

A tunable L-Band mode-locked fiber laser based on a short Bismuth-based Erbium-doped fiber is presented. A chirped fiber Bragg grating (CFBG) centered at ~1600.9 nm was used both as a spectral filter and as a dispersive device. Stable mode locking operation was demonstrated with average output power of 2.85 mW. The optical pulses have width and repetition rate of 7.43 ps and 12.8 MHz, respectively. By mechanically tuning the CFBG, the central wavelength of the modelocked laser can be tuned between 1599.1 and 1602.5 nm.