Abstract
The importance of spectroscopy to the development of rare-earth-doped fiber systems cannot be overstated. Parameters such as the energy level lifetimes, absorption and emission cross sections, and the energy transfer parameters in more concentrated systems determine the viability of any laser transition. The parameters form the input-to-numerical models that are developed to optimize and understand the performance of the mid-infrared light source. In this chapter, the essential spectroscopic parameters are presented, discussed, and compared. This chapter is concerned with laser transitions that emit light with wavelengths shorter than 4 µm and the host for the rare-earth ions is confined to fluoride glass, the glass host that has underpinned the development of light sources in the mid-infrared.
| Original language | English |
|---|---|
| Title of host publication | Mid-infrared fibre photonics |
| Subtitle of host publication | glass materials, fibre fabrication and processing, laser sources and devices |
| Editors | Stuart Jackson, Maria Pawliszewska, Réal Vallée |
| Place of Publication | Duxford, UK ; Cambridge, US ; Kidlington, UK |
| Publisher | Woodhead Publishing |
| Chapter | 7 |
| Pages | 333-399 |
| Number of pages | 67 |
| ISBN (Electronic) | 9780128180181 |
| ISBN (Print) | 9780128180174 |
| DOIs | |
| Publication status | Published - 2022 |
Keywords
- Absorption cross section
- Emission center wavelengths
- Emission cross section
- Energy level
- ETU
- Exited-state absorption
- Fluorescence
- Full-width at half-maximum
- Lifetime
- Macroscopic rate parameters
- Spectroscopy
- Stimulated emission
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