Title :
Comparison of Transmission Performance of 40-Gb/s Optical Duobinary and DCS-RZ Signals Using 10- and 40-Gb/s LiNbO3 Mach–Zehnder Modulators
Author :
Kim, YongHoon ; Jang, Hodeok ; Kim, Sangil ; Oh, Seunghyun ; Lee, Jaehoon ; Kim, Kyoungsoo ; Lee, Hanlim ; Jeong, Jichai
Abstract :
We investigated a cost-effective method using 10-Gb/s LiNbO3 Mach-Zehnder modulators (MZMs) for transmitting 40-Gb/s duobinary nonreturn-to-zero (NRZ) and duobinary carrier-suppressed return-to-zero (DCS-RZ) signals. The transmission performance of the signals was investigated. The optimum bandwidths of low-pass filters in transmitters using 10- and 40-Gb/s LiNbO3 MZMs were also investigated. The calculated transmission performance of the transmitter using 10-Gb/s LiNbO3 MZMs was compared to that using 40-Gb/s LiNbO3 MZMs. The effect of the bias offset in the transmitters was investigated. Compared to duobinary-NRZ and DCS-RZ signals generated by a transmitter using 40-Gb/s LiNbO3 MZMs, those generated by using 10-Gb/s LiNbO3 MZMs can be transmitted with 1-dB power penalty over 480-km transmission
Keywords :
Mach-Zehnder interferometers; lithium compounds; low-pass filters; optical fibre communication; optical modulation; optical transmitters; 10 Gbit/s; 40 Gbit/s; 480 km; DCS-RZ signal; LiNbO3; LiNbO3 Mach-Zehnder modulators; duobinary carrier-suppressed return-to-zero signal; duobinary nonreturn-to-zero signal; duobinary-NRZ signal; low-pass filters; transmitter; transmitters; Bandwidth; Fiber nonlinear optics; Low pass filters; Nonlinear optics; Optical filters; Optical modulation; Optical receivers; Optical signal processing; Optical transmitters; Radio transmitters; Duobinary; modulation format; optical communication; simulation;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.887181
