Simultaneous Application of Raman and Laser-Induced Breakdown Spectroscopy in the Gas Phase with a Single Laser and
1University of Bremen, Technische Thermodynamik, Bremen, Germany.
Applied Spectroscopy
|February 1, 2024
Summary
This study presents three methods for simultaneously using Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) for gas analysis. These techniques enable combined molecular and elemental diagnostics using a single detector.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Physical Chemistry
Background:
- Raman spectroscopy provides molecular information, while laser-induced breakdown spectroscopy (LIBS) offers elemental analysis.
- Simultaneous application of Raman and LIBS is difficult due to differing signal generation and detection requirements.
- Gas-phase diagnostics benefit from complementary molecular and elemental data.
Purpose of the Study:
- To propose experimental schemes for the simultaneous application of Raman spectroscopy and LIBS.
- To overcome challenges in combining these techniques for gas-phase analysis.
- To enable quasi-simultaneous detection of both signal types.
Main Methods:
- Development of three distinct experimental setups for combined Raman and LIBS.
- Utilizing ring-cavity optical pulse stretchers to shape laser pulse pairs.
- Employing a Q-switched laser source for signal generation.
- Implementing a single detector for quasi-simultaneous signal acquisition.
Main Results:
- Successful demonstration of three schemes for simultaneous Raman and LIBS measurements.
- Effective shaping of laser pulse pairs for quasi-simultaneous signal detection.
- Validation of the proposed methods for gas-phase diagnostics.
Conclusions:
- The proposed experimental schemes facilitate the combined application of Raman spectroscopy and LIBS.
- Quasi-simultaneous detection on a single detector is achievable.
- This approach enhances capabilities for comprehensive gas-phase analysis.
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