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

fYear

2012

fDate

21-23 May 2012

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2012 Symposium on

Conference_Location

Shanghai

ISSN

2156-8464

Print_ISBN

978-1-4577-0909-8

Type

conf

DOI

10.1109/SOPO.2012.6271066

Filename

6271066