Abstract
The principal problem in a multigigabit-per-second long-haul optical transmission system by direct modulation is waveform distortion by laser chirp, fiber nonlinearity, and fiber dispersion. Self-phase modulation (SPM) in the fiber can be compensated by equalizers with linear dispersion arranged within certain intervals.1 Laser transient chirp can be treated similarly, although the direction of wavelength shift in the optical pulse caused by laser chirp is opposite to that caused by SPM.2·3 On the basis of these findings the authors have theoretically investigated a technique for simultaneously compensating laser chirp, SPM, and dispersion.
© 1993 Optical Society of America
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