Gain dispersion and saturation effects in four-wave mixing in semiconductor laser amplifiers

Author

Koltchanov, Igor ; Kindt, Stefan ; Petermann, Klaus ; Diez, Stefan ; Ludwig, Reinhold ; Schnabel, Ronald ; Weber, Hans G.

Author_Institution

Inst. fur Hochfrequenztech., Tech. Univ. Berlin, Germany

Volume

32

Issue

4

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

712

Lastpage

720

Abstract

This paper addresses four-wave mixing (FWM) in semiconductor laser amplifiers from the point of view of a propagation problem. The gain dispersion effect, i.e., the difference of the gain factors for the pump, probe and signal waves is shown to be significant in the case of large detunings >1 THz. It is given an analytical solution of the FWM problem including gain dispersion and saturation effects. Considering the saturation behaviour, it is shown that the linear gain factors for the different waves and the nonlinear susceptibilities associated with the different nonlinear effects must be characterized by different carrier densities at transparency. A comparison of our theory with a numerical model, with previous approaches and with experimental data is given

Keywords

carrier density; laser theory; multiwave mixing; nonlinear optical susceptibility; optical dispersion; optical pumping; optical saturation; semiconductor lasers; transparency; FWM problem; analytical solution; carrier densities; four-wave mixing; gain dispersion; gain dispersion effect; gain factors; large detunings; linear gain factors; nonlinear susceptibilities; probe; propagation problem; pump; saturation behaviour; saturation effects; semiconductor laser amplifiers; signal waves; transparency; Charge carrier density; Dispersion; Four-wave mixing; Gain; Numerical models; Optical propagation; Probes; Pump lasers; Semiconductor lasers; Semiconductor optical amplifiers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.488846

Filename

488846