Title :
Cross-phase modulation in multispan WDM optical fiber systems
Author :
Hui, Rongqing ; Demarest, Kenneth R. ; Allen, Christopher T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Kansas Univ., Lawrence, KS, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
The spectral characteristics of cross-phase modulation (XPM) in multispan intensity-modulation direct-detection (IM-DD) optical systems are investigated, both experimentally and theoretically. XPM crosstalk levels and its spectral features are found to be strongly dependent on fiber dispersion and optical signal channel spacing. Interference between XPM-induced crosstalk effects created in different amplified fiber spans is also found to be important to determine the overall frequency response of XPM crosstalk effects. XPM crosstalk between channels with different data rates is evaluated. The crosstalk level between higher and lower bit rate channels is found to be similar to that between two lower bit rate channels. The effect of dispersion compensation on XPM crosstalk in multispan optical systems is discussed and per span dispersion compensation was found to be the most effective way to minimize the effect of XPM crosstalk
Keywords :
optical crosstalk; optical fibre dispersion; optical fibre networks; optical modulation; phase modulation; telecommunication channels; wavelength division multiplexing; XPM crosstalk; XPM crosstalk levels; XPM-induced crosstalk effects; amplified fiber spans; cross-phase modulation; dispersion compensation; fiber dispersion; lower bit rate channels; multispan WDM optical fiber systems; multispan intensity-modulation direct-detection optical systems; optical signal channel spacing; overall frequency response; spectral characteristics; spectral features; Bit rate; Fiber nonlinear optics; Intensity modulation; Nonlinear optics; Optical crosstalk; Optical fiber dispersion; Optical fibers; Optical modulation; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
