The Spectral Characteristics and Atmospheric CO2 Absorption of the Ho(+3):YLF Laser at 2.05 micrometers.
Abstract
This report presents the procedures used to obtain the spectral profile of the holmium:YLF laser and to calculate the absorption and self-broadening coefficients of CO2 from atmospheric transmittance data taken with this laser. Three laser wavelength regions are observed, one of which is resolved into a previously undetected doublet. The coincidence of the holmium laser radiation with the (4nu2 + nu3) combination band of CO2 is determined to be principally with the R30 absorption line. Several partial pressures of CO2 from 0.5 to 10 torr are used, buffered with N2 to a total pressure of 760 torr. The line center absorption coefficient at atmospheric concentrations of CO2 (0.25 torr) determined from this work is 0.52 + or - 0.07 per km. An average value of the self-broadening coefficient is determined to be 0.44. This information will be used in the evaluation of the holmium laser for field army applications. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA025618
Entities
People
- Kenneth O. White
- Pattie S. Gillespie
- R. L. Armstrong
Organizations
- United States Army Communications-Electronics Command