ANALYSIS OF A PASSIVELY MODE-LOCKED SELF-STARTING ALL-FIBER SOLITON LASER

In this paper, modelling results are presented for a passively mode-lo cked figure-eight laser (F8L) supporting a linear polarization state. Starting from amplified spontaneous emission, the model produces solit on, chirped, red-shifted ultrashort pulses. The self-starting conditio ns of the laser are investigated, and the erbium-doped fiber amplifier gain threshold to passively mode-lock the laser is also determined as a function of the center coupler splitting ratio (C(r)). In addition, the influence of C(r), as well as the effects of the cavity length (L (c)), first- and second-order group velocity dispersion to the F8L ope rating parameters, and output pulse characteristics such as width, pea k power, chirp, self-frequency shift and envelope distortion, are stud ied.