Short pulse generation near 1.55-um wavelength

Pulses with approximately 200 fs pulse width were generated by using a two stage pulse compression mechanism of gain- switched DFB laser pulses which were originally approximately 10 ps long. The pulse compression mechanism utilizes fiber nonlinearities and it involves propagation through specific lengths of various types of fiber and a nonlinear loop mirror. Simulation of the whole compression scheme by solving the nonlinear Schrodinger equation using the split step method shows good agreement with the experiment results.