FLUORESCENCE-EXCITATION AND HOLE-BURNING SPECTROSCOPY OF HEAVY-DOSE NEUTRON-IRRADIATED ALPHA-AL2O3

Authors
BAUER R BOGNER U MAIER M
Citation
R. Bauer et al., FLUORESCENCE-EXCITATION AND HOLE-BURNING SPECTROSCOPY OF HEAVY-DOSE NEUTRON-IRRADIATED ALPHA-AL2O3, Applied physics. B, Lasers and optics, 60(6), 1995, pp. 507-512
Citations number
29
Journal title
Applied physics. B, Lasers and optics → ACNP
ISSN journal
09462171
Volume
60
Issue
6
Year of publication
1995
Pages
507 - 512
Database
ISI
SICI code
0946-2171(1995)60:6<507:FAHSOH>2.0.ZU;2-B
Abstract
We report on persistent spectral hole-burning and fluorescence-excitat ion spectroscopy in heavy-dose (3 x 10(20) n/cm(2)) neutron-irradiated and annealed sapphire using a Ti:Sapphire ring laser in single-freque ncy and broad-band operation. The optimum conditions for hole burning were obtained after annealing the crystals to 400 degrees C. Holes hav e been detected in the near-infrared spectral range between 745 and 79 5 nm. At 1.5 K, the narrowest hole widths were approximately 2 GHz, so that about 10(4) holes can be burnt in this spectral region. Besides the storage density in the wavelength dimension, the coefficient descr ibing the electric-field-induced filling of a spectral hole also rises by more than one order of magnitude as compared to crystals with low neutron-irradiation dose.