Features of propagation of beams of coherent phase-modulated radiation

The transformation of intensity distributions occurring as a phase-modulated laser beam propagates is experimentally investigated. The influence of the depth of sinusoidal phase modulation on the transformation of the phase distribution into the intensity distribution occurring at a distance equal to a quarter of the Talbot length is revealed. Periodic self-reproduction of the radiation intensity distributions, the phase of which is modulated according to a periodic fractal law, is registered. The features of the Talbot effect caused by the use of a phase transparency based on the Weierstrass function are revealed.