Development of High-Sensitivity Laser Absorption Spectroscopy System for Number Density Measurement of Atomic Oxygen in Optically Thick Plasma

2021 ◽  
Vol 19 (3) ◽  
pp. 447-451
Author(s):  
Makoto MATSUI ◽  
Ryo MORITA
Keyword(s):  
Absorption Spectroscopy ◽  
Atomic Oxygen ◽  
Density Measurement ◽  
High Sensitivity ◽  
Number Density ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Spectroscopy System

Effect of laser linewidth on the tunable diode laser absorption spectroscopy system

Laser Physics ◽  
2020 ◽  
Vol 30 (12) ◽  
pp. 125702
Author(s):  
Zhang Rui ◽  
Wang Fang ◽  
Wang Yan ◽  
Yan Bo ◽  
Guo Hong-Fei ◽  
...  
Keyword(s):  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Tunable Diode Laser ◽  
Laser Linewidth ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Spectroscopy System ◽  
Diode Laser Absorption

Measurement on Gas Number Density Distribution by Tunable Diode Laser Absorption Spectroscopy

2014 ◽  
Vol 986-987 ◽  
pp. 1523-1526
Author(s):  
Hui Jie Zheng ◽  
Wei Quan
Keyword(s):  
Density Distribution ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Gas Absorption ◽  
Tunable Diode Laser ◽  
Absorption Lines ◽  
Number Density ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption

An experimental technique was designed to measure the gas number density distribution of alkali vapor by tunable diode laser absorption spectroscopy. The measurement method was developed by scanning multiple gas absorption lines and fitting the experiment data with Lorentz profile to obtain the density. A discretization strategy of the equation for absorption lines is also present here as well as a constrained liner least-square fitting method. A simulation model was set up to reconstruct the two-dimensional distribution of number density and the feasibility of the reconstruction was verified. In the end, this work demonstrates the calculation error of the acquired number density and the distribution. The results indicated that the error would be no more than 5% if the measurement error is less than 9%.

High Precision Temperature Control Design of Gas Cell in Laser Absorption Spectroscopy System

2020 ◽  
Vol 40 (12) ◽  
pp. 1230001
Author(s):  
杨曦 Yang Xi ◽  
孙鹏帅 Sun Pengshuai ◽  
庞涛 Pang Tao ◽  
夏滑 Xia Hua ◽  
吴边 Wu Bian ◽  
...  
Keyword(s):  
High Precision ◽  
Absorption Spectroscopy ◽  
Temperature Control ◽  
Control Design ◽  
Laser Absorption Spectroscopy ◽  
Gas Cell ◽  
Laser Absorption ◽  
Precision Temperature ◽  
Spectroscopy System ◽  
Precision Temperature Control

scholarly journals Detection of disease markers in human breath with laser absorption spectroscopy

2016 ◽  
Vol 24 (2) ◽  
Author(s):  
T. Stacewicz ◽  
Z. Bielecki ◽  
J. Wojtas ◽  
P. Magryta ◽  
J. Mikolajczyk ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
High Sensitivity ◽  
The State ◽  
The Body ◽  
Individual Feature ◽  
Laser Absorption Spectroscopy ◽  
Human Breath ◽  
Laser Absorption ◽  
Disease Markers ◽  
Trace Compounds

AbstractNumber of trace compounds (called biomarkers), which occur in human breath, provide an information about individual feature of the body, as well as on the state of its health. In this paper we present the results of experiments about detection of certain biomarkers using laser absorption spectroscopy methods of high sensitivity. For NO, OCS, C

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