Fig. 6: Experimentally measured supercontinuum spectra in 20 cm of the PBG fiber as a function of pump wavelength λp.
From: Two octave supercontinuum generation in a non-silica graded-index multimode fiber
a λp = 1600 nm, b λp = 1700 nm, c λp = 1900 nm, d λp = 2000 nm, e λp = 2200 nm, and f λp = 2500 nm. The output pulse energy E is indicated in each subplot. The OPA spectrum is also shown for each pump wavelength and the dashed line marks the spectral regions measured using different OSAs (see Methods). The spectral peaks at wavelengths of 750 nm and 1040 nm are residues from the OPA and OPA pump laser, respectively. The black solid line in b shows the experimental spectrum obtained in a 20 cm GRIN silica fiber using the same pump wavelength of 1700 nm and injected intensity (see also Methods).
