Tunable Laser Absorption Spectroscopy of Uranium in Femtosecond Laser Ablation Plasmas

2016 ◽  
Author(s):  
Mark C. Phillips ◽  
Sivanandan S. Harilal ◽  
Jeremy Yeak
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Absorption Spectroscopy ◽  
Tunable Laser ◽  
Femtosecond Laser Ablation ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption

scholarly journals Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3216 ◽  
Author(s):  
Shuanke Wang ◽  
Zhenhui Du ◽  
Liming Yuan ◽  
Yiwen Ma ◽  
Xiaoyu Wang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Dimethyl Sulfide ◽  
Tunable Laser ◽  
Distributed Feedback ◽  
Integration Time ◽  
Laser Absorption Spectroscopy ◽  
Atmospheric Measurements ◽  
Pure Nitrogen ◽  
Laser Absorption ◽  
Interband Cascade Laser

This paper presents a mid-infrared dimethyl sulfide (CH3SCH3, DMS) sensor based on tunable laser absorption spectroscopy with a distributed feedback interband cascade laser to measure DMS in the atmosphere. Different from previous work, in which only DMS was tested and under pure nitrogen conditions, we measured DMS mixed by common air to establish the actual atmospheric measurement environment. Moreover, we used tunable laser absorption spectroscopy with spectral fitting to enable multi-species (i.e., DMS, CH4, and H2O) measurement simultaneously. Meanwhile, we used empirical mode decomposition and greatly reduced the interference of optical fringes and noise. The sensor performances were evaluated with atmospheric mixture in laboratory conditions. The sensor’s measurement uncertainties of DMS, CH4, and H2O were as low as 80 ppb, 20 ppb, and 0.01% with an integration time 1 s, respectively. The sensor possessed a very low detection limit of 9.6 ppb with an integration time of 164 s for DMS, corresponding to an absorbance of 7.4 × 10−6, which showed a good anti-interference ability and stable performance after optical interference removal. We demonstrated that the sensor can be used for DMS measurement, as well as multi-species atmospheric measurements of DMS, H2O, and CH4 simultaneously.

DFB interband cascade lasers for tunable laser absorption spectroscopy from 3 to 6 μm

2013 ◽  
Author(s):  
M. von Edlinger ◽  
J. Scheuermann ◽  
L. Nähle ◽  
C. Zimmermann ◽  
L. Hildebrandt ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Tunable Laser ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

Femtosecond Laser Ablation of Liquid Toluene: Molecular Mechanism Studied by Time-Resolved Absorption Spectroscopy

1999 ◽  
Vol 103 (51) ◽  
pp. 11257-11263 ◽  
Author(s):  
Koji Hatanaka ◽  
Tamitake Itoh ◽  
Tsuyoshi Asahi ◽  
Nobuyuki Ichinose ◽  
Shunichi Kawanishi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Molecular Mechanism ◽  
Absorption Spectroscopy ◽  
Femtosecond Laser Ablation ◽  
Time Resolved

scholarly journals Dynamic computational optical fringe mitigation in tunable laser absorption spectroscopy

2020 ◽  
Vol 28 (26) ◽  
pp. 39017
Author(s):  
Chu C. Teng ◽  
Eric J. Zhang ◽  
Chi Xiong ◽  
William M. J. Green ◽  
Gerard Wysocki
Keyword(s):  
Absorption Spectroscopy ◽  
Tunable Laser ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption
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