Waveguide XPW set-up.
Internal XPW efficiencies as a function of the input energies for the four different laser sources used. Theoretical curve in the case of laser (2) was obtained with a home-made simulation code. Maximum XPW output energy for each laser is shown on top of the plots. Fiber transmission and reflection losses are taken into account.
Input (dotted line) and XPW (solid line) spectra for the four laser chains used.
Self-referenced spectral interferometry (Wizzler, Fastlite) temporal measurements of laser (1) and output XPW pulse plotted on (a) linear scale (respectively, 50 fs and 20 fs) and (b) logarithmic scale (respectively, solid and dashed line); (c) 3ω-autocorrelation trace of the pulse temporal profile before (dots) and after (squares) XPW for laser (4).
Typical near-field (a) and far-field (b) XPW beam profiles measured with LOA1 laser chain.
Measured and simulated beam propagation from fiber output end to XPW crystal (respectively, red diamonds and dashed line), and after XPW crystal: fundamental (respectively, dots and dashed-dotted line), and XPW (respectively, triangles and solid line).
Measured (top row) and simulated (bottom row) XPW beam profiles at the crystal position (respectively, (a) and (d)), at the refocusing position (≈ 7 cm away from the crystal) (respectively, (b) and (e)) and 65 cm after the crystal (respectively, (c) and (f)). Beam profiles were measured with Thales Optronique Femtocube laser source and simulated ones were obtained with CommodPro software.
Characteristics of the laser sources used for the experiment. Central wavelength is around 800 nm.
XPW filter performances for the different laser sources used. Energy throughput represents the global transmission of the set-up. Spectral broadening is defined as the ratio of the full-width at half-maximum (FWHM) of the XPW spectrum over the FWHM of the incident laser spectrum.
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