Title :
Optical filter impact on eye opening in vestigial sideband systems
Author :
Sorio, Jessica ; Berglind, Eilert
Author_Institution :
Lab. of Opt., R. Inst. of Technol., Kista, Sweden
Abstract :
An analytical tool is presented in order to analyze and elucidate the impact of the optical filter position and steepness on eye opening in an optical vestigial sideband system with direct detection. It is shown that bit sequences containing solitarities (i.e., bit sequences containing single bits surrounded by several bits of opposite kind) are the major bit sequences to cause eye closure. In comparison with double-sideband modulation format, an eye opening penalty of 3-6 dB can be achieved with vestigial sideband format. The analytical tool helps to understand the interrelation between the bit sequence properties and the optical filter parameters.
Keywords :
optical communication equipment; optical fibre communication; optical filters; optical modulation; wavelength division multiplexing; bit sequences; direct detection; double-sideband modulation format; eye closure; eye opening penalty; optical fiber communication; optical filter parameters; optical filter position; single sideband; solitarities; spectral efficiency; vestigial sideband systems; Amplitude modulation; Bandwidth; Cutoff frequency; Optical distortion; Optical fiber communication; Optical fiber filters; Optical filters; Optical modulation; Optical receivers; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.822006