mJ级的7八度超平面白色激光,涵盖200-25,000nm的范围.
Lihong Hong1,2,3, Renyu Feng2, Yuanyuan Liu1
1School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
Light, science & applications
|January 19, 2026
概括
研究人员开发了一种强烈的超快速白色激光,覆盖深紫外线到远红外波长. 这种新的激光器可用于各种科学和技术应用的全频谱光谱学.
科学领域:
- 激光物理 激光物理
- 频谱学是一种光谱学.
- 非线性光学是非线性光学.
背景情况:
- 超快激光技术对于先进的光谱学至关重要.
- 需要宽带激光源来进行全面的材料分析.
- 目前在实现从DUV到FIR的连续光谱覆盖方面存在局限性.
研究的目的:
- 创建一个强烈的超快的白色激光,从深紫外线 (DUV) 到远红外线 (FIR) 的连续光谱覆盖.
- 为了证明激光对全频谱激光光谱学的能力.
- 探索基础科学和技术中的应用.
主要方法:
- 使用协同非线性向上转换和向下转换模块.
- 采用中红外 (MIR) 种子脉冲激光器,通过光学参数的声脉冲放大和加密气填充的空心纤维产生.
- 设计了用于第二阶非线性波生成的曲周期抛光酸 (CPPLN) 晶体和用于差频生成的AgGaSe2晶体.
主要成果:
- 实现了强烈的白色激光,带宽为200-25,000纳米,脉冲能量为~1mJ.
- 产生的DUV波长低至200nm,转换效率为~40%.
- 产生的MIR-FIR激光波长从2000-25,000纳米,总体转换效率为18%.
结论:
- 开发的7八度超平面DUV-FIR白色激光器为电子,振动和晶格动态的同时探测提供了前所未有的功率.
- 这项技术为全频谱激光光谱学开辟了新的途径.
- 潜在的应用涵盖了广泛的物理,化学和生物物质和过程.
相关概念视频
High-Level and Low-Level Awareness
631
Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
631
Leveling Effect
1.4K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.4K
Levels of Organization
138.6K
Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
138.6K
Fermi Level
1.7K
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
1.7K
Trophic Levels
37.2K
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
37.2K
Leveling Equipment
390
As leveling involves measuring vertical distances relative to a horizontal line of sight, it requires a graduated rod, called a level rod, for vertical measurements and an instrument called a level for a horizontal sight line. A level includes a high-powered telescope with a mechanism for leveling to ensure the line of sight is horizontal when the bubble in the spirit level is centered. Leveling rods, made of wood, metal, or fiberglass, are graduated in feet or meters and commonly used in two-...
390


