Title :
Static and dynamic characteristics analysis of all-optical wavelength conversion using directionally coupled semiconductor optical amplifiers
Author :
Saitoh, Masumi ; Ma, Byongjin ; Nakano, Yoshiaki
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
We analyze the wavelength-converting operation of directionally coupled semiconductor optical amplifiers (DCSOA´s) with respect to their static and dynamic characteristics. A complete dynamic DCSOA model based on the modified time-dependent transfer-matrix method is developed. This model accurately considers longitudinal variations of carrier and photon densities, gain, refractive index, coupling coefficients, and lateral optical fields. The extinction ratio, modulation bandwidth, and frequency chirping of DCSOA-based wavelength converters are investigated. For most characteristics, the DCSOA scheme has advantages over cross-gain modulation. Furthermore, by optimizing the injection current into the DCSOA, even better performance can be attained.
Keywords :
chirp modulation; laser beams; numerical analysis; optical directional couplers; optical modulation; optical wavelength conversion; refractive index; semiconductor optical amplifiers; all-optical wavelength conversion; carrier densities; coupling coefficients; cross-gain modulation; directionally coupled semiconductor optical amplifiers; dynamic characteristics; extinction ratio; frequency chirping; gain; injection current; lateral optical fields; longitudinal variations; modified time-dependent transfer-matrix method; modulation bandwidth; performance; photon densities; refractive index; semiconductor optical amplifiers; static characteristics; wavelength converters; wavelength-converting operation; Chirp modulation; Extinction ratio; Frequency modulation; Optical coupling; Optical modulation; Optical refraction; Optical variables control; Refractive index; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
