Accession Number : ADA112439
Title : The Evaluation of Saturated Amines as Potential Ultraviolet Laser Sources.
Descriptive Note : Final rept. 30 Sep 80-31 Dec 81,
Corporate Author : NORTHEASTERN UNIV BOSTON MA DEPT OF CHEMISTRY
Personal Author(s) : Halpern,Arthur M
PDF Url : ADA112439
Report Date : 25 Feb 1982
Pagination or Media Count : 18
Abstract : The specific goal of the project as outlined in the proposal was to determine whether under various pump conditions saturated amines could be observed to lase in the expected ultraviolet (280 - 320 nm) region. A variety of chemical and physical systems was chosen in order to maximize the likelihood that lasing action could be produced and observed. While superradiant fluorescence was almost always detected under conditions of 249-nm KrF* laser irradiation, no evidence of amine lasing was obtained for any compound under any conditions (i.e. vapor or condensed phase). For vapor phase systems, it was observed that extensive ionization current was produced consequent to laser pumping. While quantitative measurements of the ion yields were not performed, it is believed that the principle loss mechanism in the amine laser cavity is via up-pumping to an ion state of the parent (or fragment). Thus, despite the initially favorable prognosis of these compounds with respect to lasing action, i.e., relatively easily achievable threshold conditions, the up-pumping cross section of these compounds is apparently too large to allow for net amplification.
Descriptors : *Ultraviolet lasers, *Test and evaluation, *Saturation, *Amines, *Laser beams, Ions, Laser cavities, Ionization, Laser pumping, Threshold effects, Physical properties, Vapor phases, Irradiation, Fluorescence, Radiation
Subject Categories : Organic Chemistry
Lasers and Masers
Distribution Statement : APPROVED FOR PUBLIC RELEASE