Abstract
A novel laser interferometer is proposed. It successively generates two quadrature output signals at a high carrier frequency, combining a two-beam principle with a point spread function possessing a high slope. The interferometer is based on a dual-mode Zeeman He−Ne laser with a wavelength of 3.39 μm. It is used to present experimental investigations of an erosion capillary discharge in air produced by means of a grind-faced graphite employed as the reflector.
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