DARPA-NRL Laser Program - Semiannual Technical Report to Defense Advanced Research Projects Agency
Interim rept. 1 Jan 1975-30 Jun 1975
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
The DARPA-NRL Laser Program is concerned with the development of laser technology in three project areas chemical infrared lasers, electrical infrared lasers and electronic-state lasers. The chemical infrared laser program includes studies of pulsed HCl laser systems and molecular energy transfer processes. Several chlorinated hydrocarbons have been identified as attractive chlorine sources for HCl lasers based on the Cl HI reaction. Vibrational relaxation rates for the CO laser and the potential D2 yields HCl V-V transfer laser system have been measured. The electrical infrared program emphasizes electric-discharge gasdynamic lasers and electron-beam pumping of potential laser systems in the mid infrared. Studies of the D2 yields HCl system have been continued along with detailed measurements of the discharge and flow characteristics. The D2-CO2 laser system previously discovered has been found to have comparable efficiency to the N2-CO2 EDGDL. A number of excitation approaches are being evaluated for application to electronic state lasers. Discovery of the XeBr laser as a result of electron-beam excitation of XeBr2 mixtures has led to the rare-gas halide laser systems. Successful transverse excitation of copper chloride offers promise as a more efficient copper vapor laser. Electrical and optical pumping schemes to extend the range of operation of the previously reported Hg vapor laser are described.
- Lasers and Masers