Evaluation of laser rate parameters for YA O3:Pr(+)-3
Abstract
The radiative lifetimes, quantum efficiencies and transition rates for multiphonon decay of excited energy levels of Pr(3+) grown substitutionally in the host crystal YA O3 were measured as a function of temperature so as to evaluate the feasibility of developing Pr(3+) as a four level laser operating in the visible. In addition the observed spectral intensities of radiative transitions and positions of some energy levels were compared to calculated values. The lifetime of the H-3(6) level (13 microsec. at 77 K) as a function of temperature was found using the infrared quantum counting technique. The lifetime of the P-3(0) level (3 microsec. at 77 K) and the lifetime of the P-3(1) level (20.7 microsec. at 77 K) as a function of temperature were also measured. The quantum efficiencies and transition rate as a function of temperature were measured for the P-3(1) yields P-3(0) nonradiative transition and the H-3(6) yields H-3(5) nonradiative transition. The transition rates were found to conform to earlier multiphoton theory and were found to depend only on the energy gap of the transition and the maximum Debye cutoff frequency of the YA O3.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- February 1979
- Bibcode:
- 1979PhDT........92H
- Keywords:
-
- Atomic Energy Levels;
- Ozone;
- Praseodymium;
- Yag Lasers;
- Absorption Spectra;
- Light (Visible Radiation);
- Quantum Mechanics;
- Reaction Kinetics;
- Spectral Sensitivity;
- Lasers and Masers