Abstract
We investigate the performance limits and the impact on the system margin of 10-Gb/s duobinary modulations due to reducing the bandwidths of single-arm Mach-Zehnder (MZ) modulators in a 10-Gb/s duobinary transmitter through numerical simulation. In addition to that, the individual and combined effects of dc-bias offset ratio to switching voltage and residual chirp due to the asymmetry of modulators on the system performance have been studied using reduced bandwidth single-arm MZ modulators. Our results suggest that with a single-arm MZ modulator of bandwidth reduced to 5 GHz and a duobinary filter of 2.6-GHz bandwidth, the sensitivity penalty can be maintained within 2 dB over a 200-km span of uncompensated single-mode fiber referred to that at 0 km of ideal duobinary transmitters. In this case, the allowable range of the residual-chirp parameter is to be from -0.1 to +0.1 with dc-bias offset ratio of less than ±2.5%.
Original language | English |
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Pages (from-to) | 479-481 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 15 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2003 Mar |
Keywords
- Duobinary modulation
- Modulation format
- Optical communication
- Optical transmitter
- Simulation
- Single-arm Mach-Zehnder (MZ) modulator
- System analysis and design
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering