相关实验视频
Updated: Jun 27, 2025
08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
18.2K
基于光声谱学的超高灵敏双气体检测,利用长波,高功率,宽调,单纵模式固态激光器进行检测
Shunda Qiao1, Ying He1, Haiyue Sun1
1National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin, China.
Light, science & applications
|May 1, 2024
概括
一种新型的固态激光显著增强了光声谱学 (PAS) 用于微量气体检测. 这种高功率,可调节的激光器可以进行敏感的双气体分析,比传统来源提高传感性能.
科学领域:
- 频谱学是一种光谱学.
- 激光物理 激光物理
- 环境科学 环境科学
背景情况:
- 光声谱学 (PAS) 是一种敏感的微量气体检测方法.
- 当前的激光源限制了PAS性能.
- 固态激光在功率,光束质量和可调性方面具有优势.
研究的目的:
- 开发和评估用于PAS微量气体检测的固态激光.
- 为了证明其对双重气体分析的能力.
- 评估其适用于各种PAS技术的适用性.
主要方法:
- 一个~2μm Tm:YAP固态激光是自制的.
- 评估了激光特性 (波长,功率,稳定性,光束质量).
- 激光被集成到标准的PAS,外腔QEPAS和内腔QEPAS系统中.
- 检测了水和氨的吸收光谱.
主要成果:
- 固态激光器表现出高功率 (~130mW),优异的稳定性和良好的光束质量.
- 调范围为9.44nm,覆盖了水和氨吸收线.
- 证明了在三个PAS配置中的成功应用.
- 激光使使用单一源实现了双重气体检测.
结论:
- 开发的固态激光器是PAS的高性能激发源.
- 它显著提高了微量气体检测能力.
- 它为各种光声传感应用提供了一个多功能平台.
相关概念视频
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
213
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
213
01:19Gas Chromatography: Types of Detectors-II
368
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
368