Laser on the base LiF:F-LiNbO 3 with the temperature tuning of the generation frequency

Abstract

The process of the optic pump energy transformation in the system with temperature tuning phase-matching LiNbO3 crystal and LiF: F or F wideband laser medium with homogeneous broadening of the amplification band have been investigated. Nonlinear crystal and wideband medium was placed in the common cavity. Excitation threshold of the wideband medium generation more lower than one for parametric generation, that is why generation of the system start from wideband generation. Wideband radiation seed of the OPO signal wave and excitation threshold of the system reduced. During the generation development, when the system radiate near OPO lines, additional amplification at OPO frequences bring to effect of condensation wideband spectrum.Wavelength turning in the region O,82-l.lim was obtained by OPO in system on the base LiNbO3 and LiF: F crystal in common cavity at 0,532 im pumping.Wavelength turning in the region 1 .1-1.26 m was obtained by OPO in system on the base LiNbO3 and LiF: F crystals in common cavity at two-waves pumping (0,532 and 1 ,O64j.m) . The generation threshold of the such system is essentialy less than for OPO on the base LiNbO3 only.Optical parametric oscilation (OPO) with nanosecond puls pumping is one of the perspective sourses of tuning radiation. To obtaining high efficiency pump energy transformation into turning radiation is connected with initial level of seeding radiation. At the expense of generation the time develope decreasing it bring to threshold reduction 1,2 3.THEORYThe parametric generation is a three-wave processs, in which under wave with frequency 03 the more weak waves o and (02 generate according to correlation: 312(1) This waves interact through nonlinear polarization pnl which square-low depend on pump electric field E:where ,' -the nonlinear media susceptibility.The amplitudes three-wave equation we can write as :dz 0-81 94-2072-71961$6.0O SPIE Vol. 2698 / 229 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/16/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx