Laser Induced Breakdown Spectroscopy
Industrial Process Monitoring
Laser Induced Breakdown Spectroscopy measures the atomic emission of samples. A laser pulse is used to generate a plasma burst from the sample. The atoms in the super heated plasma emit photons which are then analyzed with an optical spectrometer. LIBS measures mostly atomic emission lines, but the appearance of these lines is greatly affected by transient effects and the nature of the sample, so that even very similar molecular compounds may be distinguised relatively easily.
PPO-LIBS SPECTROMETER SYSTEM
The PPO-LIBS Spectrometer system is the most sensitive available in the market. Our high efficiency transmission grating combined with our patented optical design maximizes the number of photons reaching the ICCD detector. Its rugged structure with no moving parts makes it an ideal system for field use such as remote detection applications for defense, security and boarder patrol.
- Higher sensitivity enables the detection of substances:
- In smaller quantities
- Further away
- Modular design for multiple different LIBS setup from benchtop to remote LIBS with telescope objective.
- Rugged design for immediate field use (no moving parts)
Volume phase holographic transmission grating technology maximizes the number photons reaching the detector and dramatically reduces “noisy photons” which contribute in masking weak Raman signals. P&P Optica’s proprietary transmission grating fabrication process produces the best transmission gratings in the market today. The following Figure compares PPO’s grating with two leading competitors.
| P&P Optica | Competitor 1 | Competitor 2 |
| Spectral Bandwidth | Multiple options available within the 250 nm – 2500 nm spectral region. |
| Absolute Diffraction Grating Efficiency | Peak: >95%, average: 70-90%; depending on bandwidth size. |
| Stray Light | <1x10-5 or 0.001% |
| SNR Multiplier | Up to 32x increase in SNR1, camera dependent. |
| Dispersion (nm/pixel) | <0.025 |
| Spectral Resolution (nm) | <0.05, wavelength and bandwidth dependent. |
| Camera Option | Gated, high sensitivity cameras, including back thinned CCD, Intensified CCD and others. Cameras are selected to provide best price to performance. Maximum usable size: 28 x 14 mm. |
| Optical Input | Multimode fibre bundle in various configurations, telescope objective, C-mount interconnect and other options available. |
| Slit Length | Variable, matching detector size up to 25 mm. |
| Slit Width | Fixed or variable, selected to optimize resolution versus signal throughput (minimum 5 microns). |
| Shutter | Optional, mechanical. |
| Dimensions | 10 cm x 11 cm x 28 cm |
| Weight | <3 kg |
1 SNR multiplier is a value calculated by taking the square root of the number of rows on a detector used in binning mode. PPO’s patented optical design allows to illuminate large CCD or CMOS arrays with no optical abberations. This allows a dramatic increase in the SNR of the Raman signal.
LIBS Analysis Summary
