Accession Number:

ADA142209

Title:

Research Investigation Directed Toward Extending the Useful Range of the Electromagnetic Spectrum.

Descriptive Note:

Progress rept. no. 34, 1 Apr 83-31 Mar 84,

Corporate Author:

COLUMBIA RADIATION LAB NEW YORK

Personal Author(s):

Report Date:

1984-05-31

Pagination or Media Count:

284.0

Abstract:

We have been studying the characteristics of light generated by distinctly non-Poisson processes. We are particularly interested in sub-Poisson light light whose fluctuations are lower than those of lasers. The use of such quiet light can be beneficial, e.g., it can increase the distance between repeaters in a fiber-optic communications system. As an example of a mechanism for producing such light, we have begun studying a Franck-Hertz apparatus excited by a space-charge-limited electron beam. We have carried out extensive theoretical calculations of the properties of such a source of light and demonstrated that under suitable conditions it can indeed lead to antibunched and sub-Poisson photon emissions. We have also proved a quantum analog of the Burgess variance theorem. This confirmed that the sub-Poisson nature of a light beam is conserved in the presence of absorptive media and additive Poisson background light. Thus the sub-Poisson light can be used in a real detection system once it is generated.

Subject Categories:

  • Radiation and Nuclear Chemistry
  • Electricity and Magnetism
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE