PHOTON-ECHO IN LAF3-PR3-FIELD PULSE PRIOR TO LASER EXCITATIONS( INFLUENCED BY AN ELECTROMAGNETIC)

Investigation of the effect of nanosecond electromagnetic pulses on th e two-pulse, three-pulse, and long-lived three-pulse photon echoes in LaF3 : Pr3+ was carried out. A strong decrease in the intensity of ech o signals depending on the time of electromagnetic-pulse insertion was observed. Experimental results may be qualitatively interpreted assum ing that the current pulse through the strip evaporated onto the surfa ce of the sample creates an electromagnetic field in the sample, causi ng, first, the shift of the energy levels of Pr3+ ions and, second, th e transverse ultrasonic field effecting the echo-intensity change.