Affiliation: | (1) Laser Division, Nuclear Research Center, Atomic Energy Organization of Iran, P.O. Box 3327, Teheran, Iran;(2) Institute of Laser Engineering, Osaka University, 565 Suita Osaka, Japan;(3) Central Institute of Physics, Bucharest, Romania;(4) P. N. Lebedev Physical Institute, Academy of Sciences of the Moscolo, USSR |