Second harmonic generation by quadri-beam

摘要

The scheme for obtaining quadri-beams is studied theoretically and experimentally. In this scheme the quadri-beam is obtained from the plane wave or Gaussian beams using two biprisms. Using optical elements with different number of reflecting planes one can obtain the beams with complex symmetric intensity patterns. The second harmonic generation by quadri-beams is experimentally investigated. The theoretical explanation of the obtained spatial distribution of second harmonic radiation is given.