Dark soliton synthesis using an optical pulse synthesizer and transmission through a normal-dispersion optical fiber

Abstract

We precisely generate dark solitons using an optical pulse synthesizer (OPS) at a repetition rate of 25 GHz and experimentally investigate soliton transmission through a normal-dispersion fiber. Because of their particular waveform, there are not many experimental studies. The OPS provides frequency-domain line-by-line modulation and produces arbitrary pulse waveforms. The soliton waveform has an intensity contrast greater than 20 dB. At certain input peak power, the pulse exhibits soliton transmission and maintains its initial waveform. The power agrees with soliton transmission theory. We confirm that the π phase shift at the center of the dark soliton is maintained after transmission through the fiber. We also investigate the influence of stimulated Brillouin scattering for long-distance transmission.

Compensating group delay distortion of signals based on engineered material dispersion

“…21 Since transmission systems are generally in normal dispersion regions where group velocity is smaller than c, group delay distortions are caused by the lagging group delay. [22][23][24] So far, various dispersion compensation schemes have been proposed to eliminate group delay distortion in optical fiber transmission. digital compressors, and in-line amplifiers.…”