Abstract
We study the impact of the seed pulse on ultra-short pulse sequences and narrow-band sources produced by pumping two input pulses that are identical but delayed one with another in a 10-mm long silica photonic crystal fiber with two ZDWs. The collision between the induced seed pulse and input pulses will increase the power of ultra-short pulse sequences in long-wavelength region. The darkness of dark solitons on the red side of pump is influenced by modulation frequencies and depths of the seed pulse. In particular, the energy red-shift of narrow-band sources can be obtained by tuning the parameters of the seed pulse. Besides, initial chirp also influences the generation of ultra-short pulse sequences by dark solitons. We have shown that it is effective to control the power of ultra-short pulse sequences by varying the parameters of the seed pulse.
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