A variable weight address code based on spectrum amplitude coding (SAC) is proposed for optical code division multiple access (OCDMA) networks to support different quality of service (QoS) requirements of different services. The zero cross-correlation magic square variable weight optical orthogonal code (ZMS-VWOOC) proposed in this paper has great flexibility in terms of code weight and number of users. Zero cross-correlation can eliminate the influence of multiple access interference (MAI) and reduce the system complexity. Numerical results show that ZMS-VWOOC can provide better quality of service than similar codes. Numerical results for a ZMS-VWOOC OCDMA network designed for triple-play services operating at 0.622 Gbit/s, 2 Gbit/s, 2.5 Gbit/s and 3 Gbit/s are considered.