At present opportunity to apply phase conjugation phenomenon to laser facilities is widely investigated /1, 2/. High power nanosecond laser designs with SRS mirrors are considered as well /3, 4/. To discuss such designs it is very important. to obtain experimental data on performance of kilojoule class lasers, having aperture '> 0.5 rn, with phase conjugation. However, there is no publications in literature about experiments of such level.In our paper we present first experimental data, having been obtained on gas iodine laser with (0.4 -1.2) rn aperture and 6 kJ radiation energy in a nanosecond pulse in a single channel, using SBS mirror.
Laser setup is shown inFig.l. (20 -50) ns duration pulse of mester oscillator is applied to a power channel input. Power channel consists of two iodine arnpl if lers and SBS cell. Energy, pulse shape, near and far field images of input, incident, reflected and output beair are recorded in experiments. O-8194-0502-7/91/$4.OO SPIE Vol. 1412 Gas and Metal Vapor Lasers andApplications(1991) / 267 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/23/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx
This paper considers a 9-frame photorecorder that has been developed on the basis of an JR camera of ionization type with the use of an image converter. The photorecorder operates in the spectral range of 1 -10 im at a frame rate of 10-200 kHz and frame duration of 1-50 jis. It has the temperature detection threshold of 400°C and spatial resolution of >i0 elem./frame. The photorecorder will find the use in recording the structure of thermal fields in fast processes (gas dynamics, ballistics, pulsed welding, and thermal treatment of surfaces).
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