Full
LIU Quan (1997-), male, Master candidate. E-mail: 707361196@qq.com
Outline
Mid-infrared light sources have some important applications in military and national economy, such as national defense safety, food safety, spectral analysis and so on. Recent research work on rare-earth element ions doped chalcogenide glasses and optical fibers mainly focuses on improving the solubility of rare-earth element ions, reducing the local phonon energy of rare-earth element ions and co-doping of sensitized ions. The mid-infrared fluorescence of rare-earth element ions such as Dy3+, Pr3+, Dy3+, Tb3+, and Sm3+ can be obtained in glass and optical fiber. This broadband mid-infrared fluorescence is applied in the sensing field to realize the sensing of gases such as CO2 and CH4. This review represented recent research progress on rare-earth element ions doped mid-infrared chalcogenide glasses and optical fibers. Various factors affecting the mid-infrared luminescence of chalcogenide glass fibers were discussed, i.e., the solubility of rare-earth element ions, phonon energy around rare-earth element ions, energy transfer between sensitized ions and impurity loss. The research progress of broadband mid-infrared fluorescence in the field of gas sensing was summarized. There are five deficiencies in the research of rare-earth element ions doped sulfur fiber gas sensor. Obtaining the mid-infrared laser in rare-earth element ions doped glass fiber is still a challenge. In addition to seeking the solutions from the perspective of active fiber preparation (i.e., matrix selection, rare-earth ions co-doping, local structure regulation, preform glass purification, etc.), some aspects of optical fiber grating writing technology, pump laser power and wavelength tuning were also concerned. Rare-earth element ions doped mid-infrared chalcogenide fiber as a promising optical material has a great application potential due to its advantages of compactness, compactness and economy.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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