Aa. Kaminskii et al., OPTICAL 2ND-HARMONIC GENERATION WITH THE CHERENKOV TYPE PHASE-MATCHING IN BULK NONLINEAR LABGEO5 CRYSTAL, Kvantovaa elektronika, 23(5), 1996, pp. 391-392
Under pico- and femtosecond pumping the conical-ring second harmonic g
eneration with the Cerenkov type phase matching are excited in bulk no
nlinear LaBGeO5 crystal. The so-called Cerenkov rainbow phenomenon was
observed for the first time.