Title :
Ultrabroadband Gain Characteristics of a Quantum-Dot-Doped Fiber Amplifier
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Shanghai Jiao Tong Univ., Shanghai
Abstract :
In this paper, the energy level, transition configuration, and numerical model of a quantum dot (QD) doped fiber amplifier are presented using a two-level model for the first time. The results calculated using theoretical model are in good agreement with experimental results from literature. The rate and power propagation equations of the model are further solved to investigate the effects of the QD concentration, fiber length, ambient temperature, and pump power on bandwidth of the gain spectra; the results show that when pumped at 1200 nm, the fiber can have ultrabroad room-temperature gain spectra in the range 1.2-1.62 mum, which can utilize the low-loss bandwidth of the all-wave fiber without absorption peak caused by OH group.
Keywords :
doping profiles; laser beams; optical fibre amplifiers; optical pumping; optical transmitters; semiconductor optical amplifiers; wavelength division multiplexing; QD concentration; ambient temperature; fiber length; gain spectra bandwidth; laser pump power; power propagation equation; quantum-dot-doped fiber amplifier; temperature 293 K to 298 K; ultrabroadband gain characteristics; wavelength 1.2 mum to 1.62 mum; wavelength 1200 nm; wavelength division multiplexing; Bandwidth; Doped fiber amplifiers; Energy states; Glass; Optical amplifiers; Optical fiber amplifiers; Optical pumping; Power system modeling; Quantum dots; Stimulated emission; Numerical model; optical amplifier; quantum dot (QD);
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2008.2010267
