Nd-doped mode-locked fiber laser with dispersion management for conventional soliton generation

Abstract

Lasers with a wavelength of 0.9 μm have important applications in the medical, printing, detection, military, and biological fields. We have developed an Nd-doped fiber laser that achieved the observation of the conventional soliton at 0.9 μm waveband for the first time. A pair of transmissive diffraction gratings was employed to introduce negative dispersion and suppress mode competition at 1.06 μm, which resulted in a suppression ratio of up to 41.9 dB. A maximum repetition rate of 13.14 MHz is observed, with a pulse width ascertained at 3.92 ps. To our knowledge, this is the first instance that conventional solitons have been obtained through dispersion management in a 0.9 μm Nd-doped fiber laser. This work offers a novel approach for achieving shorter pulses in Nd-doped fiber lasers.