Spectroscopic investigation of Yb,Ho,Pr:YAG as a 3 μm laser source
Autor: | Ronald W. Stites, Thomas R. Harris |
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Rok vydání: | 2016 |
Předmět: |
Ytterbium
Materials science Photoluminescence business.industry Praseodymium chemistry.chemical_element 02 engineering and technology Yttrium 021001 nanoscience & nanotechnology Laser 01 natural sciences law.invention Semiconductor laser theory 010309 optics Optics chemistry law 0103 physical sciences Optoelectronics 0210 nano-technology Holmium business Lasing threshold |
Zdroj: | SPIE Proceedings. |
ISSN: | 0277-786X |
DOI: | 10.1117/12.2209625 |
Popis: | In addition to the well-established 5I7 to 5I8 transition at 2.09 μm in holmium doped laser materials, there also exists a less energetic transition from the 5I6 level to 5I7 at 2.95 μm. As there has been a recent increase in interest and applications for 3.0 μm light, this material stands to be a viable alternative to other rare earth doped laser systems. Unfortunately, the wavelength required to directly pump the 5I6 level at 1.13 μm is not convenient for commercial laser diodes. Furthermore, the emission lifetime of the 5I7 state is longer than the 5I6 level, leading to a suppression of lasing due to “bottlenecking” in the material. To overcome these effects, we investigated the activation and deactivation of holmium doped yttrium aluminum garnet (YAG) using ytterbium and praseodymium respectively. By including ytterbium ions in the host material, readily available 914 nm diode light can be used to resonantly excite the 5I6 level in holmium. Similarly, the presence of praseodymium resonantly de-excites the 5I7 state, reducing its lifetime, and making the material more suitable for lasing. Here, we report the absorption and photoluminescence spectra of this triply doped Yb,Ho,Pr:YAG crystal. In addition, the emission lifetime for both the 2.09 μm and 2.95 μm transitions are reported and compared to a Yb,Ho:YAG control sample. |
Databáze: | OpenAIRE |
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