FIELD: physics.
SUBSTANCE: laser radiation with nanosecond duration is transmitted through a plasma waveguide at an angle to the optical axis of the waveguide, optical refraction index distribution with a cylindrical profile with the maximum refraction index along the boundary and the minimum along the centre of the pipe is formed in the narrow spectral region of anomalous dispersion near the fixed spectral absorption line of the plasma.
EFFECT: obtaining, within a plasma waveguide, a regular spatial structure of the optical refraction index in the spectral region of anomalous dispersion near the wavelength which corresponds to the narrow spectral absorption line in high-speed ionisation wave plasma.
6 dwg
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