An investigation was made of the conditions for optimisation of passive negative feedback with GaAs plates acting as feedback elements in picosecond pulse generation. A long (1μs) train of pulses (τ=13 ps) was generated in an Nd : YAG laser. A study was made of the influence of self-defocusing of picosecond pulses in the course of two-photon absorption in GaAs on the evolution of the time and energy parameters of the laser radiation.
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Ganeev et al. (1997) studied this question.
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