Construction of a two-dimensional-VWOOC based on time domain/frequency domain optical CDMA system

Abstract

In this paper, a new two-dimensional variable weight optical orthogonal code (2D-VWOOC) for optical code division multiple access (OCDMA) system is constructed. It takes the C as the frequency hopping sequence and the strict variable weight optical orthogonal code (SVWOOC) as the time spreading sequence. The code can meet the different quality of service (QoS) requirements of different users. Under the same time spread sequence, the bit error rate (BER) of QCHC/SVWOOC is 3∼9 orders of magnitude lower than that of other similar 2D-VWOOCs. In Optisystem simulation, when the transmission rate of the system is 14 Gbits/s, the BER of users with code weight 4 is 7 orders of magnitude lower than that of users with code weight 2, and a clear and correct eye diagram can be obtained.

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