The second-, third-and fourth-order Raman spectra of GaP monocrystals have been investigated, and the relative intensities measured. It is found that the fourth-order Raman maxima are only a little less intense (about 5 times) than the thud-order ones. Polariton scattering from GaP has also been investigated. It is found that the intensities of polariton scattering and second-order scattering are similar.
Optoel ectr oni cs Di v. , P. N. Lebedev Physi cs I risti tute Lenirisky pr. 53, Moscow, 117924, RUSSIA ABSTRACT Suggested algorythm and proposed construction of electrooptical system provi de an abrupt di ml ni shi rig of I nformati on fi ow i ri such a situation as global vision of the earth surface. An estimation of the efficiency of this algorithm gives the data flow compression in the vision system by a factor of 1O-lO. Initial e
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