- LITHIUM NIOBATE CRYSTAL NO FURTHER A MYSTERY

A mechanical shutter enabled carrying out irradiation cycles, which during the experiments here documented experienced one s period and 2 s dim time separation. The probe beam originates from the low-electric power He-Ne laser (λ�?�?33 nm) focused to a waist of 20 µm and counter propagating with respect to the green pump beam. Probe p