Accession Number : AD0891907

Title :   Spectral Characteristics of Far Infrared Lasers For Use in Surveillance and Communications Systems.

Descriptive Note : Research and development rept. Jun 69-Jun 71,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA

Personal Author(s) : Schade, W. J., Jr

Report Date : 04 OCT 1971

Pagination or Media Count : 36

Abstract : A variable gas laser was developed for analyzing resonant spectra in the range of 10-500 micrometers using laser resonator interferometry (LRI). The scanning far infrared laser was calibrated with a Michelson interferometer and an He-Ne laser at 633 nm. Resonant spectra of CO2, H2O, and HCN were produced and analyzed in separate operations. The theoretical conditions for resonance are examined for application of LRI to scanning laser resonators. A new quantity called the index of resonance is defined and introduced to describe the mode content in different classes of laser resonators. LRI is compared with previous methods for measuring absolute frequencies and wavelengths. (Author)

Descriptors :   (*GAS LASERS, SPECTRUM ANALYZERS), (*INFRARED DETECTORS, CALIBRATION), INFRARED LASERS, INFRARED SPECTRA, LINE SPECTRA, POWER, CARBON DIOXIDE, WATER VAPOR, HYDROGEN COMPOUNDS, CYANIDES.

Subject Categories : Lasers and Masers
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE