Self-phase modulation
Abstract
An interesting manifestation of the intensity dependence of the refractive index in nonlinear optical media occurs through self-phase modulation (SPM), a phenomenon that leads to spectral broadening of optical pulses. SPM is the temporal analog of self-focusing that manifests as a narrowing of the spot size of CW beams in a nonlinear medium with 
0. This chapter considers SPM as a simple example of the nonlinear optical effects that can occur in optical fibers. Section 4.1 is devoted to the case of pure SPM as it neglects the GVD effects and focuses on spectral changes induced by SPM. The combined effects ...
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