High-frequency temporal structure of laser and phase-conjugated signals in intracavity degenerate four-wave mixing of radiation from electron-beam-controlled discharge CO₂and CO lasers in their active media

Abstract

Complex impedance spectroscopy study was done on 0.91Pb(Zn 1=3 Nb 2=3 )O 3 -0.09PbTiO 3 (PZN-PT) single crystals in the wide range of temperatures (25-525 C) and frequencies (1 kHz-1 MHz). The ac conductivity was computed from the impedance data and the activation energy for conduction at different frequencies was determined. Frequency explicit plots of imaginary components of impedance exhibit Debye-like peak shapes. Cole-Cole diagrams were observed in the high temperature regime. Temperature dependent conductivity measurement and Cole-Cole plots fairly establish the existence of quenched random defects in the PZN-PT system.

NH3 laser THz emission under optical pumping by “long” (∼100 µs) CO2 laser pulses

“…2). At the same time, high-frequency power oscillations (∼41 MHz) in a "long" CO 2 laser pulse associated with intermode beating [17] were not always replicated in the temporal shape of the NH 3 laser pulse (they are absent in Fig. 2, but they are in Fig.…”