Title :
A Novel All-Optical Flip-Flop Based on Single-Wavelength SOA-MZI
Author :
Sedghi, Mohammad ; Kaatuzian, Hassan ; Khatami, Saeid
Author_Institution :
Dept. of Electr. Eng., Amirkabir Univ. of Technol., Tehran, Iran
Abstract :
In this paper, a novel set-reset all-optical flip-flop (SR-AOFF) is proposed. The SR-AOFF is based on semiconductor optical amplifier-Mach Zehnder Interferometer (SOA-MZI) operating at a single wavelength. It is composed of two coupled SOA-MZIs using a common bidirectional coupler. Due to self phase modulation (SPM) and self gain modulation (SGM) in SOAs, two SOA-MZI switches modulate the injected photon rate of each other. This process occurs in a positive feedback loop to demonstrate an optical bistabilty. The simulation results show that excitation pulses with 35ps duration and optical energy of 7.5fJ can switch the output states. Switching transition time is about 110ps and is equal for leading and falling edges. The output power of this flip-flop is estimated to be in the order of 20 milliWatts.
Keywords :
Mach-Zehnder interferometers; optical bistability; optical couplers; optical logic; self-phase modulation; semiconductor optical amplifiers; Mach Zehnder interferometer; all optical flip-flop; energy 7.5 fJ; excitation pulses; optical bidirectional coupler; optical bistabilty; photon rate; positive feedback loop; power 20 mW; self gain modulation; self phase modulation; semiconductor optical amplifier; set reset all-optical flip-flop; single wavelength SOA-MZI; switching transition time; Nonlinear optics; Optical buffering; Optical interferometry; Optical pulses; Optical pumping; Optical switches; Semiconductor optical amplifiers;
Conference_Titel :
Photonics and Optoelectronics (SOPO), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0909-8
DOI :
10.1109/SOPO.2012.6271066
