Precision of phase conjugation (PC) during a four-wave parametric interaction

Iu. A. Arutiunov, V. V. Zherdienko, A. I. Khizhni︠a︡k

Valery V. Ivakhnik, E. G. Martasova, В. И. Никонов

Anatoli P. Sukhorukov, Vyacheslav A. Trofimov

S. A. Vizniuk, Pavel P Pashinin, Alexander M. Prokhorov +2 more

L. A. Afanas’ev, А. А. Ионин, Yu. M. Klimachëv +3 more

An influence of different parameters such as gas pressure, specific input energy, laser mixture content, intensity ratio for probe and co-propagating pumping wave, coherency and geometry, etc., upon characteristics of phase conjugation (PC) signal and PC reflectivity (PCR) at intracavity degenerate four-wave mixing (DFWM) of long pulse carbon-dioxide and carbon lasers radiation in their inverted medium has been studied.

А. А. Ионин, А. А. Котков, A K Kurnosov +2 more

Energetic, temporal and spectral characteristics of the process of phase conjugation (PC) at intracavity degenerate four wave mixing (DFWM) of frequency selective pulsed e-beam controlled discharge CO laser radiation have been studied both experimentally and theoretically. Maximum PC reflectivity (PCR) on energy comes up to 1.5% being independent of specific input energy. The dependencies of PCR on energy have quite different behavior for various selected spectral lines. An influence of lasing and PC process in adjacent vibrational bands on PCR for the selected spectral line has been experimentally demonstrated, PCR decreasing at switching on adjacent vibrational bands. The numerical model has been formulated to simulate the temporal behavior of PC process on large scale gain (amplitude) and refraction (phase) gratings formed in the active medium of CO laser. The trend in the calculated temporal behavior of PCR is the same as for the experimental result, the theoretical PCR being higher as compared to experimental one. The resonance (amplitude) mechanism of PC process seems to be a prevailing one for DFWM of CO laser radiation.