Infrared Spectral Supercontinuum in Tapered Fiber

Evolution of the spectrum and intensity along the tapered sector of  the fiber in the presence of SRS

Extra spectral broadening appears already on the initial stage of the propagation (i.e. there is an optimum propagation length).

Fine interference-like modulation on the both sides of the spectrum appears.

The red-side of the spectrum prevails over the blue-side, where the solitonic spectrum is located.