Title :
Adaptive modeling of laser diode nonlinearity with memory
Author :
Hazaveh, Kamyar ; Fernando, Xavier
Author_Institution :
Electr. & Comput. Eng. Dept., Ryerson Univ., Toronto, Ont., Canada
Abstract :
Direct modulation of laser diode in radio-over-fiber applications offers a cost effective solution compared to modulation by external devices. Laser diode nonlinearity is the biggest challenge, however, with direct modulation. Previous work has proposed adaptive pre/post compensation of laser diode nonlinearity based on a third order Volterra filter without memory. In this paper, the memory effect of the laser diode is studied by solving the rate equations. It is found that the memory effects of the laser diode are significant with modulating frequencies 10 MHz and above. A seventh order Volterra filter with nine memory terms models the laser diode nonlinearity when the input is 20 MHz with an accuracy of 0.01%.
Keywords :
nonlinear filters; nonlinear optics; optical communication equipment; optical fibre networks; optical modulation; radio links; semiconductor lasers; 10 MHz; 20 MHz; Volterra series; adaptive laser diode nonlinearity modeling; direct modulation; memory effect; modulating frequency; nine memory term; nonlinear system; radio-over-fiber applications; rate equation solving; seventh order Volterra filter; Adaptive filters; Costs; Diode lasers; Frequency modulation; Laser noise; Mathematical model; Nonlinear equations; Optical fibers; Resonance light scattering; Semiconductor lasers;
Conference_Titel :
Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on
Print_ISBN :
0-7803-7781-8
DOI :
10.1109/CCECE.2003.1226313
