All-optical CDMA system with enhanced security based on variable two-code keying

We put forward the first all-optical optical code-division multiple-access(OCDMA) system with 2 users based on variable code shift keying(CSK). The all-optical exclusive OR logical gate in the system employs the ultrafast performance of optical fiber nonlinear effect and operates without wavelength transforming. In our system, the data rate is 10Gb/s and the transmission distance in optical fiber of G.652 is 20 km. A quantitative analysis of data confidentiality is presented. Compared with other secure systems, our system can greatly improve the confidentiality of the transmitted information.

[1]  P.R. Prucnal,et al.  Optical Encryption With OCDMA Code Swapping Using All-Optical xor Logic Gate , 2009, IEEE Photonics Technology Letters.

[2]  T.H. Shake,et al.  Security performance of optical CDMA Against eavesdropping , 2005, Journal of Lightwave Technology.

[3]  P.R. Prucnal,et al.  Demonstration of an All-Optical OCDMA Encryption and Decryption System With Variable Two-Code Keying , 2008, IEEE Photonics Technology Letters.

[4]  I. Glesk,et al.  Improving Transmission Privacy Using Optical Layer XOR , 2007, 2007 Conference on Lasers and Electro-Optics (CLEO).

[5]  Wei Liang,et al.  Security performance analysis of an M-code keying OCDMA system , 2007, Photonic Network Communications.