Title :
Ultrashort-Pulse High-Power Yb3+-Doped Fiber Amplifiers
Author :
Yahel, Eldad ; Hess, Ortwin ; Hardy, Amos A.
Author_Institution :
Univ. of Surrey, Guildford
Abstract :
Ultrashort optical pulse propagation in high-power Yb3+-doped fiber amplifiers (YDFA) is studied using a spectrally resolved nonlinear power equation for the coupled pulse components. The Yb3+ ions transitions are modeled using a rate equation. Examples for high-power YDFAs with normal dispersion show good qualitative agreement with experimental results. We analyze the effects of the incident pulse wavelength, pulse peak power, Yb3+ concentration, pump filling factor, fiber length, pumping configuration, pump power and nonlinear index, on the intensity distribution of short amplified pulses. We also demonstrate the spectral compression of an initially negative-chirped pulse.
Keywords :
laser transitions; optical fibre amplifiers; optical fibre dispersion; optical pulse generation; ytterbium; Yb3+-doped fiber amplifiers; fiber length; negative-chirped pulse; nonlinear index; pump filling factor; pump power; pumping configuration; spectrally resolved nonlinear power equation; ultrashort-pulse high-power fiber amplifiers; Filling; High power amplifiers; Nonlinear equations; Optical coupling; Optical fiber amplifiers; Optical propagation; Optical pulses; Pulse amplifiers; Pulse compression methods; Semiconductor optical amplifiers; Optical fiber amplifiers; optical fiber dispersion; optical fiber theory; optical pulse amplifiers; ytterbium (Yb);
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2007.902390
