Theoretical determination of optical properties for sapphire doped with titanium from its microscopy and analysis of its capabilities for laser without population inversion

Abstract : This presentation is split into two main parts. In the first, we estimate photo-physical constants of titanium doped sapphire from a simple analytical model using a Huang-Rhys theory for the determination of the spectral profile of simple bands and from a realistic hypothesis of superposition of the latter. We define a formula for the total refractive index of Ti:sapphire as a function of dopant concentration. In a second part, we evaluate, according to the verification of a concept, the laser capability without population inversion for a doped crystal with low symmetry. We support our demonstration by establishing a generalized laser threshold condition. This concept would be a technological breakthrough in the field of large doped crystals and has not yet been investigated by the community.
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Antonio Da Silva. Theoretical determination of optical properties for sapphire doped with titanium from its microscopy and analysis of its capabilities for laser without population inversion. Optics [physics.optics]. Université Paris-Saclay, 2017. English. ⟨NNT : 2017SACLX075⟩. ⟨tel-01668566⟩

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