Explaining simultaneous dual-band carbon nanotube mode-locking Erbium-doped fiber laser by net gain cross section variation.
In this paper we report the pulse evolution of a simultaneously mode-locked Erbium-doped fiber laser at 1556-nm-band and 1533-nm-band. We explain the dual wavelength laser operation by means of net gain cross section variations caused by the population inversion rate dependence on the pump power. At 1556-nm-band, we observed pulse duration of 370 fs with bandwidth of 8.50 nm and, for pump power higher than 150 mW, we observe the rise of a CW and mode-locked laser, sequentially, at 1533-nm-band. We show that both bands are simultaneously mode-locked and operate at different repetition rates.
Henrique G
HG
Rosa
David
D
Steinberg
Eunézio A
EA
Thoroh de Souza
D004871:Erbium / Q000737:chemistry*; D007834:Lasers; D037742:Nanotubes, Carbon / Q000737:chemistry*; D055100:Optical Fibers; D013057:Spectrum Analysis
D037742:Nanotubes, Carbon; D004871:Erbium