Title :
Symmetric highly efficient (/spl sim/0 dB) wavelength conversion based on four-wave mixing in quantum dot optical amplifiers
Author :
Akiyama, Tomoyuki ; Kuwatsuka, Haruhiko ; Hatori, Nobuaki ; Nakata, Yoshiaki ; Ebe, Hiroji ; Sugawara, Mitsuru
Author_Institution :
Fujitsu Labs. Ltd., Atsugi, Japan
Abstract :
Conversion efficiency to longer wavelengths in four-wave-mixing-based wavelength conversion in optical semiconductor amplifiers is generally much lower than that in the opposite direction. This study demonstrates experimentally that this feature is drastically improved, and the asymmetry between conversion directions is eliminated by using quantum dots in the active layer. We attribute this to a reduction in linewidth enhancement factor due to the discreteness of the electron states in quantum dots.
Keywords :
laser theory; multiwave mixing; nonlinear optical susceptibility; optical hole burning; optical wavelength conversion; semiconductor device models; semiconductor optical amplifiers; semiconductor quantum dots; spectral line breadth; symmetry; wavelength division multiplexing; WDM; active layer; asymmetry; conversion directions; electron states discreteness; four-wave mixing; four-wave-mixing-based wavelength conversion; linewidth enhancement factor reduction; optical semiconductor amplifiers; quantum dot optical amplifiers; quantum dots; symmetric highly efficient wavelength conversion; Electrons; Four-wave mixing; Nonlinear optics; Optical amplifiers; Optical mixing; Optical wavelength conversion; Quantum dots; Semiconductor optical amplifiers; Stimulated emission; Wavelength conversion;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1021995
