The Effects of Bandpass Filtering on the Dissipative Soliton Generation in a Passively Mode-locked Fiber Laser

다국어 초록 (Multilingual Abstract)

We numerically investigate the evolution of a dissipative soliton in erbium-doped fiber (EDF) mode-locked lasers operating in the net normal cavity dispersion regime. The pulse evolution in the laser cavity is analyzed by using a simulation based on the generalized nonlinear Schr?inger equation, including the gain medium, the saturable absorber and the bandpass filter for efficient laser mode-locking. The analysis particularly focused on the function of bandpass filtering, which played a crucial role in balancing the pulse evolution against the dispersive propagation in a normal dispersion waveguide. The characteristics of the laser output spectra are analyzed for various bandwidths of the filter with other parameters fixed. As a result, we obtained a maximum spectral bandwidth of 20 nm in the laser output for a 13-nm bandwidth of the filter; the pulse duration was about 200 fs. Our results imply the possibility for realizing sub-picosecond (ps) pulse generation in a dissipative soliton laser system possessing a large net normal cavity dispersion.

참고문헌 (Reference)

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