23 June 1999 Fiber gratings for dispersion compensation in a 10-Gbit/s IM-DD semiconductor laser system
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Abstract
Chromatic dispersion is one of the most important transmission limitations in systems operating at 1550 nm, and much effort has been invested in obtaining dispersion compensation schemes for standard fibers already installed. Various different fiber Bragg grating dispersion compensation schemes are studied or a system composed of a directly modulated 1550 nm single-mode semiconductor laser signal propagating through a standard nonlinear fiber link. The laser diode is simulated by its stochastic rate equations, while the apodized chirped fiber Bragg gratings are obtained by numerical resolution of their coupled-mode equations. The optimal grating length for dispersion compensation after transmission through 100 km standard single-mode fiber is obtained by means of minimizing the eye opening penalty of the signal. Pre and post-compensation cases are analyzed separately, and differences between both cases are discussed in detail. Different optimal grating lengths arise for each case, and better results are obtained in general with post-compensation. Pulses with a FWHM of the order of 65 ps with various laser chirp parameters are reconstructed using a 5.75 cm chirped grating with a 16th- order Gaussian apodization function.
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Priscila Garcia-Fernandez, Juan Diego Ania-Castanon, A. Sanchez-Diaz, Jose M. Soto-Crespo, "Fiber gratings for dispersion compensation in a 10-Gbit/s IM-DD semiconductor laser system", Proc. SPIE 3609, Optical Pulse and Beam Propagation, (23 June 1999); doi: 10.1117/12.351059; https://doi.org/10.1117/12.351059
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