Abstract

We report on interferometric experiments which show that evaporography together with cw far-infrared (FIR) sources in the 10-mW-power level is suited for two-dimensional FIR interferometry of stationary plasmas, while pyroelectric image recording in principle allows pulsed two-dimensional FIR interferometry with FIR pulse energies in the millijoule range. As an example, the electron density distribution in a carbon arc is determined interferometrically with a cw HCN laser (λ = 337 μm). In addition, some specific problems of two-dimensional interferometry in the FIR are discussed.

© 1977 Optical Society of America

Multichannel HCN interferometer for electron density profile measurements of tokamak plasmas

D. Véron, J. Certain, and J. P. Crenn
J. Opt. Soc. Am. 67(7) 964-967 (1977)

Interferometry from 1950 to the present

L. Genzel and K. Sakai
J. Opt. Soc. Am. 67(7) 871-879 (1977)

Present and future problems concerning lasers in the far-infrared spectral region*

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J. Opt. Soc. Am. 67(7) 894-901 (1977)

Measurement of small vibrations using electronic speckle pattern interferometry: Theory

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Noise considerations in stellar speckle interferometry*†

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