Gain-guided soliton in a positive group-dispersion fiber laser.
We report on the operation of a passively mode-locked fiber ring laser made of purely normal dispersive fibers. Self-started mode locking can still be achieved in the laser by use of the nonlinear polarization rotation technique, and the mode-locked pulse has large pulse energy, strong frequency chirp, and a mode-locked spectral width limited by the effective laser gain bandwidth. Furthermore, we show that the operation of the laser can be well described by an extended Ginzburg-Landau equation model that governs the soliton dynamics of fiber lasers.
Zhao
L M
LM
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798. luming_zhao@pmail.ntu.edu.sg
Tang
D Y
DY
Wu
J
J