Title :
Nonlinear distortions due to the "dispersive" transmission of SCM optical signals in the presence of chirping effect: an accurate analysis
Author :
Betti, S. ; Bravi, E. ; Giaconi, M.
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
Abstract :
In hybrid multichannel amplitude modulation-quadrature amplitude modulation (AM/QAM) optical fiber transmission systems based on subcarrier-multiplexing (SCM) technique, the performance is affected by the joint action of the AM-FM conversion due to the chirping effect in semiconductor laser and the chromatic dispersion of the optical fiber. In this letter, analytical expressions of the power spectral density of the nonlinearity distortions due to "dispersive" transmission of chirped intensity-modulated signals are calculated, assuming that the message modulating the semiconductor laser is a Gaussian process.
Keywords :
amplitude modulation; chirp modulation; nonlinear optics; optical fibre communication; optical fibre dispersion; optical modulation; quadrature amplitude modulation; semiconductor lasers; subcarrier multiplexing; AM-FM conversion; Gaussian process; SCM; SCM optical signals; accurate analysis; amplitude modulation; chirped intensity-modulated signals; chirping effect; chromatic dispersion; dispersive transmission; hybrid multichannel AM/QAM optical fiber transmission systems; nonlinear distortions; nonlinearity distortions; power spectral density; quadrature amplitude modulation; semiconductor laser; subcarrier-multiplexing; Amplitude modulation; Chirp modulation; Chromatic dispersion; Fiber lasers; Laser noise; Nonlinear distortion; Optical fibers; Quadrature amplitude modulation; Semiconductor lasers; Signal analysis;
Journal_Title :
Photonics Technology Letters, IEEE
