Title :
Tb/s Optical Logic Gates Based on Quantum-Dot Semiconductor Optical Amplifiers
Author :
Rostami, Ali ; Nejad, Hamed Baghban Asghari ; Qartavol, Reza Maram ; Saghai, Hassan Rasooli
Author_Institution :
Photonic & Nanocrystal Res. Lab. (PNRL), Univ. of Tabriz, Tabriz, Iran
fDate :
3/1/2010 12:00:00 AM
Abstract :
The performance of an ultrafast all-optical logic gate based on quantum-dot semiconductor optical amplifier (QD-SOA) has been theoretically analyzed in this paper. We introduce a novel approach to accelerate the gain recovery process with a control pulse (CP) using the cross-gain modulation (XGM) effect. It is shown that the optical XOR gate in a Mach-Zehnder interferometer-based structure is feasible at Tb/s speeds with proper quality factor. The operation capability at 2.5 Tb/s with a Q-factor of 4.9 and 2 Tb/s with a Q -factor of 8.8 is reported for the first time. This capability indicates great potential for ultrafast all-optical signal processing and switching.
Keywords :
III-V semiconductors; Mach-Zehnder interferometers; Q-factor; gallium arsenide; high-speed optical techniques; indium compounds; nonlinear optics; optical communication equipment; optical information processing; optical logic; optical modulation; optical switches; semiconductor optical amplifiers; semiconductor quantum dots; InAs-InGaAs; Mach-Zehnder interferometer-based structure; bit rate 2 Tbit/s; bit rate 2.5 Tbit/s; control pulse; cross-gain modulation effect; optical XOR gate; quality factor; quantum-dot semiconductor optical amplifiers; ultrafast all-optical logic gate; ultrafast all-optical signal processing; ultrafast all-optical signal switching; Logic gates; Optical interferometry; Optical modulation; Optical signal processing; Performance analysis; Pulse modulation; Quantum dots; Semiconductor optical amplifiers; Stimulated emission; Ultrafast optics; All-optical processing; Tb/s optical gate; control pulse; quantum- dot (QD) amplifier;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2009.2033253
