Accurate method for the measurement of absorption cross sections of solid-state saturable absorbers
| Autor: | Bernard Ferrand, Michael Fromager, V.N. Yakimovich, V.I. Levchenko, Richard Moncorgé, N. V. Kuleshov, Sylvain Girard, V.G. Shcherbitsky |
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| Rok vydání: | 2002 |
| Předmět: |
Quantum optics
Materials science Physics and Astronomy (miscellaneous) business.industry Far-infrared laser General Engineering Absorption cross section General Physics and Astronomy Saturable absorption Laser Q-switching law.invention Optics law business Absorption (electromagnetic radiation) Beam (structure) |
| Zdroj: | Applied Physics B: Lasers and Optics. 74:367-374 |
| ISSN: | 1432-0649 0946-2171 |
| DOI: | 10.1007/s003400200809 |
| Popis: | A rigorous approach taking into account both the temporal and spatial distributions of the pulsed probe beam used for transmission measurements of solid-state saturable absorbers is applied to characterise these absorbers accurately. The use of this method can significantly influence the resulting value for the ground-state absorption cross section. It also permits us to avoid the introduction of an artificial excited-state absorption in systems where, according to energy-level diagrams, no such loss should occur. This is illustrated in the case of passive Q-switchers for 1.5-μm lasers such as Co2+-doped LaMgAl11O19 and MgAl2O4 and Co2+- or Cr2+-doped ZnSe and ZnS. |
| Databáze: | OpenAIRE |
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