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Nonsilica Oxide Glass Fiber Laser Sources: Part I

Nonsilica oxide glasses have been developed and studied for many years as promising alternatives to the most used silica glass for the development of optical fiber lasers with unique features and properties. Depending on the glass former of choice, these glasses can offer very distinctive physical properties if compared to silica-based glasses. With regard to the development of photonic fiber devices, these key properties include low phonon energy, high rare-earth ion solubility, high optical...

Nonsilica Oxide Glass Fiber Laser Sources: Part II

Nonsilica oxide glasses have been developed and studied for many years as promising alternatives to the most used silica glass for the development of optical fiber lasers with unique characteristics. Their main properties and compositions, alongside the optical fiber fabrication principle, have been previously reviewed in part I. This chapter will review the development of optical fiber lasers operating in the infrared wavelength region based on nonsilica glass fiber materials, either phospha...

Measurement uncertainty and metrological traceability

L’uso delle tecniche di analisi archeomagnetica per la datazione delle fornaci di Chieri

Il metodo della datazione archeomagnetica è stato applicato per ricostruire l’età dell’ultimo utilizzo di due fornaci rinvenute a Chieri (To), in via dei Molini 4 e in via Albussano 30, durante lavori di scavo per il rinnovo dell’edilizia urbana. In entrambi i casi, la stabilità del segnale magnetico misurato in campioni di argilla cotta prelevati dalle pareti delle fornaci e la disponibilità di curve di variazione secolare del campo magnetico terrestre valide per il territorio Italiano, hann...

Avogadro, Planck and the kilogram redefinition

In 2018, the General Conference on Weights and Measures reformed the International System of Units by adopting fixed values for some fundamental constant of physics. The kilogram, a unit previously defined by a material artefact, is now established and realised from the knowledge and the technology of the modern world.

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