Research and Development of Yttrium Aluminate Lasers.

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Abstract:

Yttrium orthoaluminate YA1O3 doped with rare earth ions is investigated for use as an optically-pumped laser material. Two laser ions are studied in detail neodymium Nd3 and holmium Ho3 sensitized with erbium and thulium. Measurements of optical absorption and emission spectra, fluorescence kinetics, and stimulated emission corss section are reported. NdYA1O3 laser rods are oriented along the three principal crystallographic directions were tested in long-pulse, Q-switched, and CW operation. The laser outputs and efficiencies of NdYA1O3 are compared with those obtained from NdYAG in the same operating configuration. HoYA1O3 laser action is investigated at liquid nitrogen temperatures. Long-pulse and Q-switched laser performance is reported for three different rod orientations. To provide information for predicting laser action and performance of other rare-earth ions in YA1O3, experiments and calculations of radiative transitions probabilities and of nonradiative decay by multiphonon emissions are presented. Author

Author(s):
Weber, Marvin J. ; Bass, Michael
Author Organization(s):
RAYTHEON CO WALTHAM MASS RESEARCH DIV
Descriptive Note:
Final rept. 4 Jan 71-3 Jan 72,
Pagination:
0124

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
S-1402, AFML-TR-72-32
Contract/Grant Number(s):
F33615-71-C-1212
Task Number(s):
737101
Project Number(s):
AF-7371
Monitor Series:
TR-72-32
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*LASERS, YTTRIUM COMPOUNDS), (*INFRARED LASERS, INFRARED OPTICAL MATERIALS), ALUMINATES, DOPING, NEODYMIUM, HOLMIUM, EUROPIUM, ERBIUM, THALLIUM, ATOMIC ENERGY LEVELS, ELECTRON TRANSITIONS, OPTICAL PUMPING, TEST METHODS, PERFORMANCE(ENGINEERING)
Field(s)/Group(s):
Lasers and Masers
Keyword(s):
LASERS, YTTRIUM ALUMINUM GARNET, *YTTRIUM ALUMINATES, *LASER MATERIALS, *NEODYMIUM LASERS, *HOLMIUM, *LASERS, EMISSION SPECTRA
Report Date:
1972 Jun 01