现代应用物理2024，Vol.15Issue(2)：87-93,7.DOI:10.12061/j.issn.2095-6223.2024.020301
掺铥光纤激光放大器在宽波段吸收光谱技术中的应用
Tm-Doped Fiber Laser Amplifier Applied to Hyperspectral Absorption Spectroscopy
摘要
Abstract
A broadband tunable narrow line width thulium doped fiber laser amplifier is developed by using the broadband emission characteristics and the line width compression characteristics of fiber saturable absorbers of Tm-doped fibers in the 2 μm band.The laser amplifier can amplify the power of the narrow line width and broadband tunable seed light source to 290 mW with a root mean square(RMS)stability less than 1％,and the amplified light source can run continuously for 30 minutes.The amplifier output is splitted into 32 beams,and a hyperspectral absorption spectroscopy test of water molecules in the 2 μm wavelength band is conducted using any of these beams.The line width of the light source during dynamic scanning process is about 0.06 nm through inversion.The temperature and water molecular fraction in air and alcohol flames are measured using this laser amplifier.The test results show that at room temperature,the average temperature in air and alcohol flames are 301.2 and 1 263.3 K,with relative deviations of 1.28％and 3.08％,respectively.The average molar fractions of water molecules are 2.11％and 5.58％,respectively.The hyperspectral absorption spectroscopy of water molecules in the 2 μm band can be effectively obtained by using this light source.By using these absorption spectroscopy data,it is possible to accurately deduce information such as ambient temperature and water molecular mole fraction.The results verify the feasibility of the light source in two-dimensional tomography applications in combustion flow fields.关键词
吸收光谱/可调谐二极管激光吸收光谱技术/宽波段吸收光谱技术/燃烧流场/掺铥光纤激光放大器Key words
absorption spectroscopy/tunable diode laser absorption spectroscopy/hyperspectral absorption spectroscopy/combustion field/Tm-doped fiber laser amplifier分类
数理科学引用本文复制引用
王亚民,吴昊龙,陶蒙蒙,刘洋阳,李国华,王晟,叶景峰..掺铥光纤激光放大器在宽波段吸收光谱技术中的应用[J].现代应用物理,2024,15(2):87-93,7.基金项目
国家自然科学基金资助项目(62105268 （）
52106222 （）
91841303) （）
激光与物质相互作用国家重点实验室基金资助项目(SKLLIM2009 （）
SKLLIM2110) （）
