Fig. 1. Simplified block diagram of the photocathode laser driver. FA1, FA2, FA3, fiber amplifiers; HG, harmonic generator; SYNC, electronic synchronization unit; OSC, digital oscilloscope; PC, computer; AWG, arbitrary waveform generator; GEN, RF generator. Yellow on black are radiation oscillograms; blue on white are temporal transmission profiles of the scheme elements. Dashed blocks (non-fiber elements) are under development in the described laser system.

Fig. 2. AOM synchronization diagram: (a) output intensity of the MO; (b) output voltage envelope of the AOM driver; (c) AOM transmission; (d) radiation intensity at the AOM output.

Fig. 3. Macropulse envelope at the second fiber amplifier output: “W/o correction,” rectangular input macropulse; “Correction,” precompensated input macropulse.

Fig. 4. Average micropulse energy inside pulse train dependence on pump control current at the second fiber amplifier output: “W/o correction,” rectangular input macropulse; “Correction,” precompensated input macropulse, rectangular output macropulse; “Continuous input,” a continuous chain of micropulses at the amplifier input.