High Average Power Thulium-Doped Silica Fiber Lasers: Review of Systems and Concepts
| Autor: | Martin Richardson, Joshua Bradford, Alex Sincore, Justin Cook, Lawrence Shah |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Silica fiber business.industry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics Power (physics) law.invention 010309 optics Electric power system Thulium chemistry law Fiber laser 0103 physical sciences Optoelectronics Laser power scaling Electrical and Electronic Engineering 0210 nano-technology business Diode |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 24:1-8 |
| ISSN: | 1558-4542 1077-260X |
| Popis: | Thulium-doped fiber lasers (TDFLs) have had the second highest growth in average output power next to ytterbium-doped fiber lasers. This has been enabled by access to high power, high brightness ∼790-nm pump diodes in conjunction with the cross-relaxation process that improves laser efficiency. While numerous high power TDFLs have been recently demonstrated, a 1-kW result from 2010 remains the highest output power system reported to date. This paper reviews these systems and the concepts behind high power TDFLs. The spectroscopic properties of Tm3+ -doped silica are first detailed, revealing complex processes and large variations among published measurements. Notable multi-100 W TDFLs are then summarized, with outputs ranging from 1908 to 2130 nm. Another route for power scaling is to in-band pump with another TDFL to enable >90% efficiencies. Both 790- and 1900-nm pumped TDFL architectures are theoretically modeled based on currently available systems. Hindered by high background losses and available pump sources, achieving >4 kW like ytterbium-fiber systems will be a substantial challenge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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