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. 1979 Oct;50(10):1306.
doi: 10.1063/1.1135701.

Optoelectronic modulation of a laser interferometer in the infrared for accurate electron density variation measurements

A Lesage  1 , J Richou, P Charil, M Combier, J L Lebrun
Affiliations

Optoelectronic modulation of a laser interferometer in the infrared for accurate electron density variation measurements

A Lesage et al. Rev Sci Instrum. 1979 Oct.

Abstract

An improved method for high-electron-density (10(17) cm(-3)) measurement in a shock-generated plasma is described. A laser interferometer operated at 3.39 mum is regularly modulated (1 MHz) by a LiNbO(3) electro-optical crystal. Thus electron-density variations of 8x10(15) cm(-3) mus(-1) and fluctuation of 8x10(14) cm(-3) can be simultaneously and accurately measured in a 4x4-cm conventional shock tube. Experimental results in reflected shock waves are presented.

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