Accession Number:

AD0813368

Title:

NONRADIATIVE PROCESSES IN OPTICAL MASER MATERIALS.

Descriptive Note:

Final rept. 25 Mar 65-24 Mar 67,

Corporate Author:

RCA LABS PRINCETON NJ

Report Date:

1967-04-01

Pagination or Media Count:

71.0

Abstract:

Background and interpretation of recent measurements of the infrared optical properties of fluoride crystals and a quantum mechanical derivation of the optical properties in the harmonic approximation are given. A procedure for phenomenological treatment of damping effects and their physical origin are discussed. In research on far-infrared optical properties of fluoride crystals the lattice absorption was found to be very small at low temperature at frequencies below transverse optic frequencies. The absorption losses are low enough to allow laser action in these materials. At higher temperatures the absorption increases rapidly, due to difference-phonon processes. In other related work, the linewidth of the Dy2 in CaF2 below 27 K was found to be 0.024 or - 0.003cm and temperature-independent. The width component determined by the phonon-emission-lifetime of the terminal state is calculated using static strain measurements.

Subject Categories:

  • Lasers and Masers
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE