20-Gb/s DPSK transmission with 550-ps/nm dispersion tolerance using silicon Mach-Zehnder modulator

Transmission measurements are performed using a low-loss zero-chirp silicon Mach-Zehnder modulator in 20-Gb/s DPSK with accumulated dispersion of -347 ps/nm to +334 ps/nm. Dispersion tolerance for 2-dB path penalty is as high as 550 ps/nm.