Low distortion pulse delay using SBS slow- and fast-light propagation in cascaded optical fibers

摘要

We show in theory that SBS slow- and fast-light can propagate in a cascaded system without group-velocitydispersion (GVD) broadening and low gain broadening by use of dispersion compensation. The twoGVDparameters in the normal and anomalous dispersion regions can be modulated to counteract so that we can get a zero-GVDbroadening pulse by using two broadband pumps with different powers and spectral widths. Using the method of dispersion compensation, the third-order dispersion (TOD) effect can also be canceled out simultaneously. Besides, the pulse compression occurs in the anomalous dispersion region, which contributes a low gain-broadening pulse. Therefore, this method could have the potential for different pump beam spectra.