A mechanical shutter enabled accomplishing irradiation cycles, which during the experiments here reported experienced 1 s period and a pair of s dim time separation. The probe beam originates from the reduced-ability He-Ne laser (λ�?�?33 nm) focused to a waist of twenty µm and counter propagating with regard to the https://-lithiumniobatecrystal30616.howeweb.com/33064531/lithium-niobate-crystal-things-to-know-before-you-buy