| Autor: |
B. Viana, N. Britos, A. M. Lejus, B. Teisseire, D. Vivien |
| Rok vydání: |
1994 |
| Zdroj: |
1994 Conference on Lasers and Electro-Optics Europe. |
| DOI: |
10.1364/cleo_europe.1994.cwc3 |
| Popis: |
In recent years, considerable interest has been devoted to the laser emitting in the 1.5–2 μm range. Ho3+ and Tm3+ operate around 2 μm while Er3+ covers the 1.5 μm range. The development of high power laser diodes lasing around 0.78 and 0.98 μm allows the pumping of these ions. Engaged in the search for new laser materials, we are interested by the gehlenite Ca2Al2SiO7 (CAS) matrix. In this matrix, there is an inhomogeneous broadening of the optical lines because of a structural disorder arising from the statistical distribution of Si4+ and half of the Al3+ ions on the same kind of tetrahedral sites. This host presents also high phonon frequency leading to short lifetime values when the energy gap difference between the emitting level and the one just below is small. Therefore, for the ions studied only the 4F3/2 level for Nd3+ (τ = 280 μs), 4I13/2 for Er3+; (τ = 7.6 ms) and 5I7 level for Ho3+ (τ = 7.4 ms) present lifetime values in the hundred of microseconds to millisecond range. Laser rods of the RE3+-doped CAS have been obtained by the Czochralski process. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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