Accession Number:

ADA014861

Title:

ARPA-NRL Laser Program. Semiannual Technical Report to Defense Advanced Research Projects Agency - 1 July 1974 - 31 December 1974

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1975-07-01

Pagination or Media Count:

37.0

Abstract:

This program is concerned with three project areas Chemical Infrared Lasers, Electrical Infrared Lasers and Electronic State Lasers. The Chemical Infrared Laser Program is concerned with the development of pulsed HCl laser systems and the study of molecular energy transfer processes. Several new sources of Cl atoms have been identified that lead to improved HCl laser performance. Low-temperature vibrational relaxation measurements in CO2 mixtures indicate a minimum in the relaxation rates near room temperature. The Electrical Infrared Program emphasizes electric-discharge-gasdynamic lasers and electron-beam pumping of potential laser systems in the mid infrared. Energy transfer has been observed in the D2-HCl system and a D2-CO2 laser has been developed. A number of excitation approaches are being evaluated for application to Electronic State Lasers. Studies of direct electron-beam excitation of the Ar-N2 laser have been completed and a sophisticated model for electron energy deposition has been developed. Optical pumping techniques, as used in the previously reported Hg vapor laser, are being extended to other atomic systems. Studies of the Hg vapor laser are essentially complete and reported here in detail. A transverse discharge Cu vapor laser has been assembled and is being tested.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE