Optical measurement of narrow band rare-earth 4f levels with energies greater than the bandgap of the host
Excited-state absorption spectra of erbium and thulium doped gallium lanthanum sulphide glasses reveal transitions whose final 4f states do not appear in the ground state absorption spectra due to resonance with the fundamental absorption of the glass host. The results give direct evidence for the m...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
1998-02.
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| Subjects: | |
| Online Access: | Get fulltext |