Heterodyne CO2-laser interferometer with direct phase read-out
- 1 September 1979
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 50 (9) , 1123-1124
- https://doi.org/10.1063/1.1135997
Abstract
A CO2-laser interferometer with heterodyne detection has been built to measure electron line densities of plasmas in the range of 10(18) to 5 x 10(22) m(-2). Heterodyne operation is accomplished by using two counteracting acousto-optic modulators at a difference frequency of 500 kHz. A digital phase comparator is used to obtain direct read-out of the phase shift. The time resolution is 3.5 micros.Keywords
This publication has 1 reference indexed in Scilit:
- GAS-BLANKET STUDIES IN A TOROIDAL DISCHARGEPublished by Elsevier ,1977