DWDM混合光学系统中帧间和信道内四波混频效应的抑制

NaifAlsowaidi; TawfigEltaif; MohdRidzuan Mokhtar

doi:10.3788/CO.20191201.0156

Volume 12 Issue 1

Feb. 2019

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Chinese Optics > 2019 > 12(1): 156-166.

Naif Alsowaidi, Tawfig Eltaif, Mohd Ridzuan Mokhtar. Suppression of inter and intra channel four wave mixing effects in optical CDMA over DWDM hybrid system[J]. Chinese Optics, 2019, 12(1): 156-166. doi: 10.3788/CO.20191201.0156

Citation:

Naif Alsowaidi, Tawfig Eltaif, Mohd Ridzuan Mokhtar. Suppression of inter and intra channel four wave mixing effects in optical CDMA over DWDM hybrid system[J]. Chinese Optics, 2019, 12(1): 156-166. doi: 10.3788/CO.20191201.0156

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Suppression of inter and intra channel four wave mixing effects in optical CDMA over DWDM hybrid system

doi: 10.3788/CO.20191201.0156

1.
Faculty of Engineering & Technology, Multimedia University, Bukit Beruang, Melaka 75450, Malaysia
2.
Faculty of Engineering, Multimedia University, Cyberjaya, Selangor 63100, Malaysia

Funds:

Multimedia University(Malaysia), project SAP ID MMUI/160092

More Information

Author Bio:
Naif Alsowaidi was born in Yemen on December 30, 1987.He received the B.Eng.degree (with honors) in communication engineering from International Islamic University Malaysia (ⅡUM), in 2012 and the M.Sc.degree.in engineering science from Multimedia University (MMU), Malaysia, in 2015, currently he is a Ph.D.candidate at the Multimedia University.His current research interests include wireless communication, Optical CDMA systems, and nonlinear optics.E-mail:nas_201013@yahoo.com

Tawfig Eltaif received his BSc degree in communication engineering from University of Tripoli, Libya, 2003, and MSc degree in microelectronics and PhD degree in micro-engineering & nanoelectronics from National University of Malaysia, Malaysia, 2005, 2009, respectively. He joined Photronix Technologies Company, 2008-2011, as a product and research engineer. Since 2012 he has been a senior lecturer at Multimedia University. His current research is focused on optical communication, optical frequency comb, FBG, and optical amplifiers

Mohd Ridzuan Mokhtar received his PhD degree in optoelectronics from the University of Southampton, UK, in 2005. He is professor at the Faculty of Engineering, Multimedia University, Malaysia. He became a research fellow with City University London, UK, for a year in 2009, sponsored by the Technology Strategy Board in the UK. He has been the director of research and collaboration at Multimedia University since 2011. His main research interests include fiber optic sensors and optical communications
Corresponding author: Tawfig Eltaif, E-mail:tefosat@ieee.org
Received Date: 07 Mar 2018
Rev Recd Date: 25 Apr 2018
Publish Date: 01 Feb 2019

Abstract

Abstract

In this study, a hybrid system of optical Code Division Multiple Access(optical CDMA) and Dense Wavelength Division Multiplexing(DWDM) is proposed with a comprehensive investigation into the effect of four-wave mixing(FWM). In such system, two major FWM problems exist, inter and intra-channel FWM, including multiple access interference(MAI) and inter-symbol interference(ISI). Results show that the optimum transmitted power is 18dBm in order to control the trade-off between inter and intra-channel FWM, where an increase in the BER of the hybrid system at transmitted power above 18 dBm is indicated. Hence, an electro-optic phase modulator(EOPM) module is proposed and placed after the WDM multiplexer to simultaneously modulate the phase of all wavelengths signals to increase the nonlinear tolerance in the hybrid system by suppressing the impact of intra-channel FWM, which is shown to greatly improve the performance of the optical CDMA-DWDM hybrid system based OOK transmission. In addition, the effect of MAI can be reduced by the use of multi-diagonal(MD) identification sequence code, due to the zero cross-correlation property of MD. The results also reveal that the CDMA technology in conjunction with chromatic dispersion helps to reduce the effect of inter-channel FWM. Moreover, the identification sequence code interval plays crucial role in the mitigating of ISI as the results expose that the best performance of the proposed hybrid system can be achieved when the identification sequence code interval squeezed into 25% of bit duration where the avoidance of ISI is guaranteed.
- optical CDMA,
- DWDM,
- Inter and Intra-channel FWM,
- MAI,
- ISI,
- EOPMDWDM

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References(28)

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