Yb:YAG diverging beam amplifier with 20 mJ pulse energy and 1.5 kHz repetition rate.

We have developed a laser system with a combination of record-breaking parameters for rod ytterbium-doped yttrium aluminum garnet (Yb:YAG) lasers with pulse energy 20 mJ, average power 30 W, and beam quality М< 1.35. This record was achieved thanks to the Yb:YAG diverging beam amplifier (DBA) geometry, which allows combining efficient amplification with high average power, good beam quality, and high-energy pulse extraction.

High average-power ultrafast CPA Yb:KYW laser system with dual-slab amplifier.

A diode-pumped, ultrafast Yb:KYW laser system utilizing chirped-pulse amplification in a dual-slab regenerative amplifier with spectral shaping of seeding pulse from a master oscillator has been developed. A train of compressed pulses with pulse length of 181 fs, repetition rate up to 200 kHz, and average power exceeding 8 W after compression and pulse picker was achieved.

Ultrafast time-to-space conversion of phase by the method of spectral nonlinear optics.

We propose a method for direct conversion of an ultrashort pulse into a monochromatic beam whose wave front either repeats or is related to the phase structure of the pulse or its spectrum. This can be done by sum-frequency generation of the spectrally resolved pulses. Experimentally, we projected two spectra of the same chirped pulse onto the nonlinear crystal so that the dispersions were opposite.

[Factual nutritional status in workers of a machine-building factory].

Physical development, energy expenditures, morbidity, and supply with the main food-stuffs were studied in machine-building workers. Peculiarities of alimentary status of workers were basis for development of hygienic recommendations on rationalization of their nutrition.