Phase-conjugation of high-power molecular CO2 and CO lasers radiation inside their active medium

摘要

Abstract: The results of experiments on four-wave interaction of electron-beam-controlled discharge (EBCD) pulsed CO$-2$/- and CO- lasers' radiation inside their active medium are presented. Linearly polarized probe CO$-2$/ (CO-) laser beam intersects strong electromagnetic waves counterpropagating through an inverted medium inside the laser resonator. The laser beam reflected from the active medium has been registered both in near-field zone and in far field. The experiments on recovering of optical images in near-field zone and recovering of angular divergency of laser radiation in far-field zone demonstrate that the reflected beam was a phase- conjugated one. The reflectivity of the phase-conjugated beam was up to 2% for CO$-2$/- laser and up to 0.2% for CO- laser. The time-history of phase-conjugation reflectivity and comparison with theoretical results are discussed. !7