Direct shaping of picosecond high energy deep ultraviolet pulses

Direct amplitude shaping of high harmonics in the extreme ultraviolet.

We demonstrate direct amplitude shaping of high harmonics (HHs) using a reflective micromirror array based on micro-electromechanical-system (MEMS) technology. We show independent control over the intensity of each HH in the observed range (14 - 36 eV). These results are used to calculate the control achieved over the temporal structure of the attosecond pulses in the train.

High-energy picosecond near-vacuum ultraviolet pulses generated by sum-frequency mixing of an amplified Ti:sapphire laser.

We demonstrate high-energy picosecond near-vacuum ultraviolet laser pulse generation. Frequency quadrupling is achieved by noncollinear sum-frequency mixing of the fundamental and the third harmonic of a two-stage Ti:sapphire amplifier in beta-BaB(2)O(4) crystal. UV pulses with energies of approximately 10 mJ tunable from 195 to 210 nm at a 10 Hz repetition rate are obtained.

Inte # Olecular Energy Transfer Stud 1 with Picosecond Light Pulses

The time deveIopment for the intermolecular transfer of electronic energy has, until recently, been studied by measurements of the molecular light emission. The observation of the transfer process has been limited to times of the order of the fluorescent lifetime, and naturally to systems which emit light $#. With the application of the picosecond method 121, which utilizes absorption, rather t...

Pressure-induced transient structural change of liquid germanium induced by high-energy picosecond laser pulses

All-fiber spectral compression of picosecond pulses at telecommunication wavelength enhanced by amplitude shaping.

We demonstrate efficient spectral compression of picosecond pulses in an all-fiber configuration at telecommunication wavelengths. A spectral compression by a factor of 12 is achieved. Performing temporal shaping with a parabolic pulse significantly improves the spectral compression with much lower substructures and an enhanced Strehl ratio.