Title :
Cost-effective 10-Gb/s optical duobinary transmission systems using a nonbuffered X-cut LiNbO3 Mach-Zehnder modulator
Author :
Lee, Hanlim ; Lee, Gyuwoong ; Kim, Sung Kee ; Cheung, Heewon ; Kim, Sangho ; Kim, Hoon ; Hwang, Seongtaek ; Oh, Yunje ; Jeong, Jichai ; Shim, Changsup
Author_Institution :
Dept. of Radio Eng., Korea Univ., Seoul, South Korea
fDate :
4/1/2004 12:00:00 AM
Abstract :
We demonstrate a cost-effective method to implement a 10-Gb/s optical duobinary transmitter using a simple nonbuffered x-cut LiNbO3 Mach-Zehnder (MZ) modulator. The bandwidth of the modulator used in our experimental demonstration is 4 GHz. The duobinary signal generated from the nonbuffered MZ modulator exhibits a similar performance to the one using a 9-GHz bandwidth buffered MZ modulator, in terms of dispersion and self-phase modulation tolerance. Thus, the use of cost-effective nonbuffered x-cut MZ modulators will substantially relax the cost issues of duobinary transmitters, by offsetting the cost of the precoder and the encoder which are not needed in conventional on-off keying transmitters.
Keywords :
Mach-Zehnder interferometers; amplitude shift keying; lithium compounds; optical dispersion; optical transmitters; self-phase modulation; 10 Gbit/s; 4 GHz; 9 GHz; LiNbO3; Mach-Zehnder modulator; cost-effective method; dispersion tolerance; duobinary transmitters; modulator bandwidth; nonbuffered x-cut LiNbO3; on-off keying transmitters; optical duobinary transmission systems; self-phase modulation tolerance; Bandwidth; Costs; Electrodes; Nonlinear optics; Optical buffering; Optical fiber communication; Optical filters; Optical modulation; Optical transmitters; Radio transmitters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.824660
