Abstract
We investigate the pattern dependency of the 40-Gb/s optical duobinary signals generated by a 10-Gb/s-rated Mach-Zehnder modulator with four different configurations. These configurations correspond to all possible combinations of a 15-GHz-bandwidth low-pass filter and a 0.24-nm bandwidth optical filter used to shape up the duobinary signals. We compare through experiment the back-to-back sensitivities and transmission performances of the duobinary signals for pseudorandom bit sequence lengths of 27-1 and 231-1. The results show that the combination of the 10-Gb/s-rated modulator and the 0.24-nm optical filter exhibits the best performance in terms of both the receiver sensitivity and pattern dependency owing to the good frequency response of the optical filter.
Original language | English |
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Pages (from-to) | 2768-2773 |
Number of pages | 6 |
Journal | Optics Communications |
Volume | 281 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2008 May 15 |
Keywords
- Lithium niobate (LiNbO) modulator
- Optical communication
- Optical duobinary
- Optical modulation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering