مشخصات پژوهش

عنوان	Dynamics of pulse amplification in tapered-waveguide quantum-dot semiconductor optical amplifiers
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Quantum dot semiconductor optical amplifier,Tapered QDSOA,Gain saturation
چکیده	Tapered-waveguide quantum dot semiconductor optical amplifiers (TW-QDSOAs) have been modeled using numerical calculation of the rate and propagation equations in this article and the amplification characteristics and dynamics of pulse propagation in non-tapered QDSOA, linear, and exponential TW-QDSOA structures have been studied and compared in detail. It has been found that TW-QDSOAs apply less distortion to the amplified pulse and have greater optical gain than non-tapered QDSOA. In TW-QDSOAs, the amplified pulse becomes much less broadening and this amount is negligible, therefore the pulse bit rate can be increased. While the amplified pulse in a non-tapered QDSOA is much broadening than the TW-QDSOAs. The carrier density distribution and dependency of the amplifier gain to the output energy for both non-tapered and tapered structures have been studied. The carrier density and gain in non-tapered QDSOA decreases more than TW-QDSOAs, indicating that the tapered amplifiers are saturated at higher input energies. Our obtained results agree well with those previously obtained for conventional tapered amplifiers.
پژوهشگران	محمد رزاقی (نفر سوم)، حامد باغبان (نفر دوم)، آرام فردی (نفر اول)