Lasing regimes in a passive Q-switch Nd-glass laser with self-phase-conjugation in the active medium and LiF: F[sup -][sub 2] crystal were studied. We demonstrate the possibility of single-mode lasing with a pulse train energy above 2 J, peak power up to 0.5 MW, spatial brightness above 1 × 10[sup 11] W/(cm² sr), and a coherence length of 0.95 m.