Table of Contents:
For those who have read through the grating compression portion of this section, you may already know where this page is going (go you!). However, for the kids in the back who haven’t been paying attention (get off your phone!), we can go ahead and explain. Since grating compression only works for pulses with normal dispersion, we need a method to compress pulses in the anomalous dispersion regime. This is typically also where we would have solitons, given a high enough input intensity pulse such that it experiences both anomalous dispersion and SPM in the fiber. Now, this may bring up a small stirring in your head if you also read through the soliton section under “Fiber Optics”. You may be thinking, “I do recall that solitons initially go through a narrowing phase at the beginning of each soliton evolution, but then it broadens. Can we take advantage of that effect?”. Well, if you were thinking this, you should go ahead and get a PhD, because that is exactly how we compress pulses in the anomalous dispersion regime! We can just choose a fiber length that compresses the desired amount depending on the soliton order N. We shall see exactly how this happens in the next section.
HIGHER-ORDER NONLINEAR EFFECTS