Accession Number:

AD0836507

Title:

PLASMA INTERFEROMETRY WITH THE AID OF AN OPTICAL QUANTUM GENERATOR (INTERFEROMETRIYA PLAZMY ZA DOPOMOHOYU OPTYCHNOHO KVANTOVOHO HENERATORA),

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Report Date:

1967-11-16

Pagination or Media Count:

9.0

Abstract:

The authors describe a plasma diagnostic procedure which combines the high phase-measurement accuracy provided by radio-frequency sounding and at the same time increases the range of measured electron density by using the shorter-wave length optical range. The phase information obtained at radio frequency is converted into optical-frequency information by introducing into the reference arm of an interferometer a single side-band modulator, which modulates in amplitude one of the laser side bands. The oscillations from both arms of the interferometer are mixed in a quadratic detector photomultiplier. In this manner the phase shift of the laser signal passing through the plasma is interpreted as the time variation of the laser frequency deviation. Frequency detection and subsequent integration of the obtained signal yield the plasma density, since its rate of change is proportional to the laser frequency deviation. Author

Subject Categories:

  • Lasers and Masers
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE