Accession Number : ADA188428

Title :   Discharge Excitation of Dye Vapors.

Descriptive Note : Final rept. Jul 86-Jul 87,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Eden, J G

PDF Url : ADA188428

Report Date : Sep 1987

Pagination or Media Count : 10

Abstract : Experiments have been conducted to assess the feasibility of obtaining a discharge-pumped dye vapor laser. A 15 (or 50) cm active length, UV-preionized device has been developed which exhibits a specific power loading of the medium of approx. 5 MW - /cm-1/cc and will operate continuously at temperatures exceeding 400 C. Recently, hydrogen thyratron switching of the device and corona preionization have been installed to minimize jitter and dye fragmentation. Optimization of the rare gas/N2 diluent mixture has been completed and fragmentation studies for several dye molecules have been conducted. POPOP and alpha-NPO are excellent in the latter regard but Coumarin 6 rapidly decomposes in the discharge environment. The fluorescence efficiency of alpha-NPO is only 40% of that for POPOP under comparable conditions. BBO and PBBO are similar in structure and molecular weight to POPOP and appear to be excellent candidates for discharge excitation. Fluorescence and small signal gain measurements are in progress. Keywords: Dye vapor; Discharge; Visible laser; Preionizer.

Descriptors :   *DYES, *IONIZATION, *LASERS, *VAPORS, ELECTRICAL CORONA, EXCITATION, FLUORESCENCE, FRAGMENTATION, GAIN, HYDROGEN, LENGTH, MEASUREMENT, MOLECULAR WEIGHT, OPTIMIZATION, POWER, SIGNALS, SWITCHING, THYRATRONS, VISIBLE SPECTRA

Subject Categories : Lasers and Masers
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE