Accession Number : ADA019860

Title :   A Far-Infrared Laser Communication System Using the Hydrogen Cyanide Laser.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Salisbury,Gary L.

Report Date : DEC 1975

Pagination or Media Count : 144

Abstract : An analysis is made of a far-infrared laser communication system using the hydrogen cyanide laser. The hydrogen cyanide lasing wavelength of 337 micrometers falls within the 350 micrometers atmospheric window and provides the impetus for a laser communication system. The system components that are examined include the hydrogen cyanide laser, far-infrared detectors, modulators and optical components. Additionally, atmospheric propagation phenomena are examined at 337 micrometers. A comparison is made of a subcarrier direct and heterodyne laser communication system using signal-to-noise ratios as a measure of the system performance. A communication system using this laser is feasible, and current state-of-the-art components may be used to realize such a system. Atmospheric absorption limits low altitude and sea-level communication link ranges to less than approximately 5km. At higher altitudes, laser power, modulator capability, detector practicality and sensitivity and antenna size are the limiting constraints on the system performance. The report contains a 129-item bibliography.

Descriptors :   *Laser communications, *Far infrared radiation, Hydrogen cyanide, Atmospheric windows, Infrared detectors, Atmospheric motion, Light transmission, Optical equipment components, Signal to noise ratio, Theses

Subject Categories : Atmospheric Physics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE