LIQUID LASER PARAMETERS.
Abstract
Studies were made of europium complexes of hexamethyl phosphoramide triethyl phosphate, and tri-n-butyl phosphate, which are promising direct-excitation liquid laser materials. An overall quantum efficiency of 0.5 for fluorescence was measured. It was found that complex formation is essentially complete when the Eu concentration is below 0.2 M even when hydrated Eu salts are used. The excess of 5D0 states required for laser action was calculated. A laser threshold of 6.3 watts/cu cm per Angstrom interval of the absorption band is calculated on the basis of these data for a 0.02 M europium complex in a 5 cm tube. Additional compounds prepared include: triethyl phosphate complexes of SmCl3, NdCl3, PrCl3, and TbCl3, which resemble the EuCl3 complexes; also EuCl3 complexes with triphenyl phosphate, urea, thiourea, dimethyl sulfoxide, dimethyl formamide, dimethyl acetamide, and tetramethylurea. Fluorescence in the complexes having C=O and S=O ligands is enhanced over that in aqueous Eu solutions, but not as much as in P=O complexes. The formation of precipitates from heated EuCl3 - alkyl phosphate complexes was further studied and a formula for the precipitate is proposed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1966
- Accession Number
- AD0628526
Entities
People
- Aryeh H. Samuel
- Daniel Grafstein
- Harvey Forest