Title :
Theoretical and experimental study of second-order distortions in CATV DFB laser diodes
Author :
Froidure, J.-C. ; Lebrun, C. ; Mégret, P. ; Jaunart, E. ; Goerg, P. ; Tasia, T. ; Lamquin, M. ; Blonde, M.
Author_Institution :
Chaire d´´Electromagn. et de Telecommun., Faculte Polytech. de Mons, Belgium
fDate :
3/1/1995 12:00:00 AM
Abstract :
Calculation of linearity performances of a given DFB laser is a well-known problem when working with CATV AM-VSB optical links. In this paper, a nonlinear model of the DFB laser is presented. The bias and frequency dependence of second order intermodulation distortion is analyzed by combining Volterra models of the laser leakage current and rate equations. The prediction of the model is then compared to distortion measurements with a maximum discrepancy of around 1.5 dB.<>
Keywords :
Volterra equations; amplitude modulation; cable television; distributed feedback lasers; intermodulation distortion; optical fibre communication; optical links; optical modulation; optical noise; semiconductor device models; semiconductor lasers; CATV AM-VSB optical links; CATV DFB laser diodes; Volterra models; distortion measurements; frequency dependence; laser leakage current; linearity performance; maximum discrepancy; nonlinear model; rate equations; second order intermodulation distortion; second-order distortions; Frequency dependence; Intermodulation distortion; Laser modes; Laser noise; Laser theory; Leakage current; Linearity; Nonlinear distortion; Optical distortion; Optical fiber communication;
Journal_Title :
Photonics Technology Letters, IEEE
