Performance optimization of a duty-cycle division multiplexing system over 8- and 40-channel wavelength division multiplexing networks is reported in this article. The modified duty-cycle division multiplexing system with optical domain multiplexing using a dual-drive Mach-Zehnder modulator is simulated with two and three users per wavelength. Using conventional dispersion compensation, the 40 x 40-Gbps system with two and three users per channel can support 240 and 160 km of transmission distance, respectively. The dispersion management technique based on a chirped fiber Bragg grating is proposed for a 40 x 3 x 13.33-Gbps duty-cycle division multiplexing/wavelength division multiplexing system that allows double the transmission distance compared to conventional technique.
- bias voltage optimization
- dispersion management
- dual-drive Mach-Zehnder modulator
- duty-cycle division multiplexing
- division multiplexing