Title :
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
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;
Conference_Titel :
Telecommunications (IST), 2010 5th International Symposium on
Conference_Location :
Tehran
Print_ISBN :
978-1-4244-8183-5
DOI :
10.1109/ISTEL.2010.5734015