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An experimental investigation was made of a compact gadolinium scandium gallium garnet (GSGG) laser activated with Cr3+ and Nd3+, and containing phototropic centers. The active element of this laser performed the function of a passive Q switch. Lasers of this kind were demonstrated to be capable of generating nanosecond pulses with an energy of up to 5 mJ per pulse.
Danilov et al. (Sun,) studied this question.