A. N. Tcypkin, S. E. Putilin, M. V. Melnik, E. A. Makarov, V. G. Bespalov, and S. A. Kozlov
In this paper, we demonstrate experimentally for the first time (to our knowledge) the generation of spectral supercontinuum (SC) of more than two octaves with high intensity in a water jet. The spectrum of the generated SC extends from 350 to 1400 nm, with intensities up to 1011 W/cm21011 W/cm2, and its generation efficiency is more than 50%. For the pump intensity 3.0×1012 W/cm23.0×1012 W/cm2 in the spectral range from 400 to 800 nm, the spectrum is nearly flat (less than 40% deviation), which is useful for many applications.
The resulting SC radiation is collimated by a silica lens ( L 2 ) with a 5 cm focal length. SC
spectrum is analyzed by the spectrometers (SD) ASP-75 (Avesta Project, spectral range of
200–1000 nm) and the EPP-2000-NIR (StellarNet Inc., spectral range of 900–1700 nm). …
