Mitigating the impact of group velocity dispersion in a time-spreading optical CDMA system

Author

Salehi, Mohammad Reza ; Abiri, Ebrahim ; Dezfouli, Mehran ; Kazemi, Keyvan

Author_Institution

Dept. of Electr. & Electron. Eng., Shiraz Univ. of Technol., Shiraz, Iran

fYear

2010

fDate

4-6 Dec. 2010

Firstpage

147

Lastpage

150

Abstract

Optical code division multiple access (OCDMA) has received increasing attention for applications in modern optical networks. The performance of OCDMA systems is strongly affected by fiber group velocity dispersion (GVD) because of using ultra short optical pulses. In this paper, a new investigation on the effectiveness of using a fiber bragg grating (FBG) with a chirped optical period at the transmitter of a time-spreading OCDMA system to mitigate the effect of GVD is carried out. FBGs with different chirp profiles are employed in order to find the best profile which enhances the system performance more effectively compared to other ones. The performance of the system is evaluated through BER parameter. Simulation results show a great improvement in the system performance when the FBG is used at the transmitter and an error free transmission is obtained for longer distances.

Keywords

Bragg gratings; code division multiple access; error statistics; optical fibre networks; optical transmitters; BER; FBG; fiber Bragg grating; group velocity dispersion impact; optical code division multiple access system; optical networks; optical transmitter; time-spreading optical CDMA system; ultra short optical pulse; Adaptive optics; Bragg gratings; Chirp; Optical fibers; Optical pulses; Optical transmitters; fiber bragg grating; group velocity dispersion; optical code division multiple access; optical orthogonal code;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications (IST), 2010 5th International Symposium on

Conference_Location

Tehran

Print_ISBN

978-1-4244-8183-5

Type

conf

DOI

10.1109/ISTEL.2010.5734015

Filename

5734015