Laser-Induced Breakdown Spectrometer & Raman Spectrometer (LiRS)
Validated TRL4 breadboard LiRS unit at MPBC Facility.
MPBC’s LiRS combines a pulsed source at 1064 nm for Laser-Induced Breakdown Spectroscopy (LIBS), coupled with Raman and fluorescence Spectroscopy using deep UV (DUV) excitation at 248.6 nm. This combination approach facilitates sequential measurement of the elemental composition and molecular structure of both minerals and organics at the same target point. The resulting complementary LIBS and Raman data greatly enhances the analysis and discrimination of various materials. The added DUV-excited fluorescence enables detection of organics to ppm levels.
LiRS provides bore-sighted integration of
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Unobscured Gregorian imaging telescope (0.1 to 1 m focus);
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Passive dichroic optical beam distribution optics;
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1280 x 960 pixel color imaging;
with the following online computations:
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LIBS elemental analysis from 240 to 830nm (1064 nm excitation);
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DUV Raman molecular composition analysis (248.6 nm excitation);
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Fluorescence spectral analysis of organics and minerals from 275 nm to 830 nm.
Specifications
| LIBS Laser power | 16 mJ at 1064 nm | |
| pulse rates to 20 | pps | |
| DUV Laser power: | up to 250 | mW |
| pulse rates to 60 | pps | |
| Spectral bands | UV: 240 to 320 | nm |
| Vis: 320 to 520 | nm | |
| NIR: 520 to 850 | nm | |
| Spectral resolution: | UV: 0.1 | nm |
| Vis: 0.14 | nm | |
| NIR: 0.3 | nm | |
| Current overall TRL | 4 (validated lab prototype) |
Partners
MPB Communications Inc., Honeywell Aerospace, University of Winnipeg, CINTECH, Canadian Space Agency
MPB Contribution
Project prime, responsible for the testbed design, and testing of the LiRS LIBS/Raman/Fluorescence system.