Optoelectronic modulation of a laser interferometer in the infrared for accurate electron density variation measurements
- 1 October 1979
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 50 (10) , 1306-1308
- https://doi.org/10.1063/1.1135701
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.Keywords
This publication has 7 references indexed in Scilit:
- Interferometer for Shock TubeReview of Scientific Instruments, 1966
- High-Frequency Laser Interferometry in Plasma DiagnosticsJournal of Applied Physics, 1965
- Performance of the He–Ne Gas Laser as an Interferometer for Measuring Plasma DensityJournal of Applied Physics, 1965
- A ZEBRA-STRIPE DISPLAY FOR AN OPTICAL INTERFEROMETER, AND ITS USE TO MEASURE PLASMA DENSITY IN THE PRESENCE OF VIBRATIONApplied Physics Letters, 1964
- The laser interferometer: Application to plasma diagnosticsProceedings of the IEEE, 1964
- PLASMA REFRACTIVE INDEX BY A LASER PHASE MEASUREMENTApplied Physics Letters, 1963
- Wavelength dependence of the refractive index of a plasma in the optical regionIl Nuovo Cimento (1869-1876), 1960