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The calculation of parametric amplification unit based on nonlinear borate crystals for multiterawatt femtosecond laser system has been carried out. A Gaussian gain profile with a ∼20% dip near the center is proposed to optimize the amplified signal spectral shape. Optimal parameters of the noncollinear type I BBO-based parametric amplifier were established.
We propose the model of the amplification of the transform-limited pulses in a homogeneously broadened medium. The model provides the information about the output characteristics of an unchirped pulse after passing through an active homogeneously broadened medium and about the population inversion inside the medium at any moment of time.
The operating modes of the solid-state laser system with 1 kHz pulse repetition rate consisting of a master oscillator and nine-pass amplifier were investigated and parameters optimization has been carried out. A carrier-envelope offset phase stabilization system was developed and implemented allowing one to achieve residual instability ∼0.17 radian (rms) for the 30 fs-pulse. It is considered to be...
In this paper, we study some components of a terawatt femtosecond laser system operating with a pulse repetition rate of 1 kHz under development. The system consists of optically synchronized pump and amplification channels; the amplification channel is based on parametric amplification in an LBO crystal, and the pump channel is based on diode-pumped Yb3+-doped laser media at 80 K. In the pump channel,...
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