Transmittance and phase matching of BBO crystal in the 3−5 μm range and its application for the characterization of mid-infrared laser pulses

Measurement of 10 fs pulses across the entire Visible to Near-Infrared Spectral Range

“…While we measured near 10 fs pulses at 650 nm and 700 nm, our OPA is known to provide 10 fs pulses in this wavelength range only. We were thus unable to verify the capability to measure 10 fs pulses down to 500 nm central wavelength, but the dispersion curves of BBO are sufficiently well known that there is no reason to believe that the FROG would not function as designed 36 . Figure 3 shows the FROG trace of a 12 fs pulse centered at 700 nm plotted on a log-scale; the quality of the reconstruction, performed with the principal components generalized projections algorithm (PCGPA) 37 is excellent, with a FROG error of below 0.005.…”

A 206-nm all-solid-state deep-ultraviolet laser with 291 MW peak power

“…Third, when pump power at 1,030 nm is beyond 117 W, corresponding to more than 12 W (>10 GW/cm 2 ), power at 258 nm is applied to BBO2 and the output 206-nm power quickly drops to zero. Linear absorption coefficients of the BBO at 206 nm, 258 nm, and 1,030 nm are .0866 cm −1 , .00836 cm −1 , and .00004 cm −1 , respectively [21]. With just a .2 mm increase on crystal thickness, it is impossible to generate up to 80% power loss observed in the experiment as both pump lasers used in our sum frequency generation have high peak intensities of 15.6 GW/cm 2 at 1,030 nm and 12.5 GW/cm 2 at 258 nm.…”

Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals

“…3 to understand how the SHG pulse shape evolves between the two limiting cases. We use values for the refractive index n(λ) for BBO published by Tamosauskas et al, [60] and compare with coefficients published by Castech [61] and Eksma Optics [62] to estimate errors, see Table I for details. Besides n(λ), the only input parameters for the calculation are the BBO thicknesses for second and fourth harmonic generation L 1 and L 2 , respectively, and the measured spectral intensity Ĩ(λ) of the fundamental pulse.…”

“…When obtaining calculated values for 6 eV bandwidth and pulse duration, we compare values for the index of refraction from three different sources [60][61][62], see Table I. We used the variation between these three sources to estimate uncertainties for the calculated values of ∆t UV and ∆E UV .…”

“…Calculated values for ∆tUV and ∆EUV using indices of refraction taken from three different sources [60][61][62]. Calculations are based on a fixed 53 meV bandwidth of the fundamental 1.5 eV pulse, L1 = 100 µm and three values of L2.…”