Brief Communications

Investigation of the focusing action of media with residual stresses

S. A. Kazakov, D. P. Krindach, G. A. Malyshev, R. V. Khokhlov


Abstract: An experimental study was made of glass plates which exhibited a focusing action after illumination with a CO laser beam. Focusing of helium–neon laser radiation by these plates gave rise to a spatial structure similar to that observed in the thermal self-focusing of light. When the region illuminated with the CO₂ laser was greater than the cross section of the helium-neon laser beam, the divergence and the transverse dimensions of the beam decreased without affecting the mode structure.

UDC: 621.378.8

PACS: 42.55.Lt, 42.65.Jx, 42.60.Jf, 42.70.Hj

Received: 23.11.1972

 English version: Soviet Journal of Quantum Electronics, 1973, 3:3, 242–243