Accession Number:

AD0743223

Title:

Infrared Laser Materials.

Descriptive Note:

Final technical rept. 15 Mar 71-14 Mar 72,

Corporate Author:

RAYTHEON CO WALTHAM MASS RESEARCH DIV

Report Date:

1972-06-01

Pagination or Media Count:

73.0

Abstract:

Neodymium-doped yttrium orthoaluminate is investigated for use as a high-efficiency optically-pumped infrared laser material. The growth of high optical quality crystals was studied and growth parameters including pull and rotation rates, atmosphere, thermal ambients, and annealing are discussed. Measurements of hardness, the distribution coefficient of Nd3 in YAlO3, dopant inhomogeneities, the presence of scattering sites, and the tube effect are described. Effects of increasing the Nd3 concentration and possible sensitizer ions for Nd3, including cerium, vanadium, and chromium, are considered. Optical spectra of Ce3YAlO3 and measurements of the rate and efficiency of Cr3 yields Nd3 energy transfer are presented. Laser rods containing 1, 2, and 3 percent Nd3 and Nd3 sensitized with Cr3 were prepared and tested in long-pulse, Q-switched, and CW laser operation. The results from these b-axis NdYAlO3 rods are compared with those obtained from NdYAG rods. Author

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE