Suppression of an opposite wave in pumping a four-wave wavefront-reversing mirror by a CO2 laser with an unstable resonator
An experimental investigation was made of optical systems in which polarizers eliminated the influence of an opposite wave on the angular characteristics of the radiation emitted by a laser with a telescopic resonator. The feasibility and advantages of the use of an unstable resonator were analyzed for a generator of reference waves in systems for a degenerate four-wave interaction at the wavelength of 10.6μ.