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spectral-hole-burning
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A theoretical analysis of the effects of erbium ion pair on the dynamics of an optical gain stabilized fiber amplifier
, Article Optics Communications ; Volume 265, Issue 1 , 2006 , Pages 283-300 ; 00304018 (ISSN) ; Mahjoei, M ; Rasouli, A ; Sharif University of Technology
2006
Abstract
In this paper, the effects of ion-pair formation on the gain dynamics of multi cavity optical automatic gain control erbium doped fiber amplifier is modelled. The inhomogeneous Cabezas simple model is used to write the rate and propagation equations for the active medium. The solution of the governing equations shows that in high concentration of the erbium ions, depending on the pumping rate, the relaxation oscillations are converted to nT-Periodic or even to chaotic behavior. Although the high concentration erbium ion in the optical amplifiers decreases the conversion efficiency and increases the threshold pump power, amplitude of the transient effects is reduced in the multi feedback-loop...
An inhomogeneous theoretical model for analysis of PbSe quantum-dot-doped fiber amplifier
, Article Optics Communications ; Volume 282, Issue 22 , 2009 , Pages 4449-4454 ; 00304018 (ISSN) ; Rooholamini, H ; Rahimi, L ; Askari, A. A ; Sharif University of Technology
2009
Abstract
Optical fiber doped with lead salts quantum dots (QDs) of different radii, has previously been proposed as a wide-band amplifier in the optical communication range. The emission and absorption spectra of QDs are size-dependent. Optical fiber amplifier doped with QDs of different sizes is an inhomogeneous gain medium. This inhomogeneity is the principle of operation of wide-band quantum-dot-doped fiber amplifiers (QDFAs). To study the effects of inhomogeneity such as spectral hole burning on the amplifier behavior, a fiber amplifier with an arbitrary size distribution of QDs is taken into consideration. The light propagation equations and rate equations for the inhomogeneous medium are...