NONRADIATIVE PROCESSES IN OPTICAL MASER MATERIALS.
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 - 0.003/cm and temperature-independent. The width component determined by the phonon-emission-lifetime of the terminal state is calculated using static strain measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0813368
Entities
People
- Douglas R. Bosomworth
- Robert C. Duncan Jr
- Wolfgang Zwrnik
- Zoltan J. Kiss
Organizations
- Sarnoff Corporation