A theoretical analysis of the radiation in X‐ray free electron lasers (FELs) LCLS, PAL‐XFEL,
SwissFEL, as well as SACLA, FLASH 2, and European XFEL is presented. Major losses in …

X-ray free electron lasers (FELs) produce ultra short bursts of coherent radiation at the
wavelengths∼ 1–100 Å. In the absence of ready seed in this range, the fundamental tone is …

The effect of the length and pressure of an argon gas jet on low-order harmonics (5th, 7th,
9th, and 11th) generation by 4.5-μm femtosecond laser radiation of a Fe: ZnSe laser system …

High harmonic generation of Hydrogen is investigated under the action of two-color and
three-color laser field. Effect of relative strengths of different components of the laser field as …

The effect of the variation of the gas pressure on the high harmonic generation (HHG) from
nitrogen molecular gas (N 2) and atmospheric air with ultrashort intense laser pulses is …

We experimentally studied the pressure dependence of the third (413 nm) and fifth (248 nm)
harmonics yield from a high-density gas cell (1–40 bar) filled with xenon in a tight focusing …

High-order harmonic generation in laser-induced plasmas is analyzed from the point of view
of presence of either molecular or atomic components. Comparison of boron carbide …

High harmonic generation (HHG) produces coherent light in the extreme ultraviolet (XUV)
spectral region. We present results on generation of high harmonics (HHs) with a temporally …

We report high harmonic generation in the extreme ultraviolet (XUV) region by using two-
color laser fields at the wavelengths of 800 nm and 400 nm. With a Ti: sapphire femtosecond …

Generation of short wavelengths is obtained using the gas cells having different lengths. A
Ti: sapphire laser system at 1 kHz or 10 Hz repetition rate is used to produce high harmonic …