Ocean Optics LIBS2500plus - Manual (Page 11)

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Chapter 1
Introduction
Product Overview
The Ocean Optics LIBS2500plus Laser-induced Breakdown Spectrometer is a detection system that
permits real-time, qualitative measurements of trace elements. This broadband, high-resolution instrument
allows for spectral analysis from 200-980 nm, with resolution of ~0.1 nm (FWHM). Sensitivity has been
reported to parts-per-billion and picogram levels.
The LIBS 2500plus consists of 1 to 7 spectrometer channels and operates with any 32-bit, USB-
compatible Windows PC. We provide OOILIBSplus Application Software with spectral-saving and data-
logging capabilities for operating the LIBS2500plus and for firing the laser. Correlation Software
provides instant material identification when using the LIBS2500plus and a spectral library consisting of
2500 atomic emission lines from the NIST (National Institute of Standards and Technology) tables for
elemental identification.
The LIBS Imaging Module is available for use with the LIBS system to enable you to precisely adjust the
laser to focus on the exact spot on the sample that you wish to analyze. The LIBS Imaging Module also
comes with special software for the camera to capture high quality images on your PC.
How the LIBS2500plus Works
A high-intensity, 10 nanosecond-wide laser pulse beam is focused on the sample area. When the laser is
fired, the high temperature of the laser ablates the surface of the sample and creates a plasma. As the
plasma decays or cools, excited atoms in the plasma emit light of characteristic wavelengths distinct to
the elements present. All elements have emission spectra in the 200-980 nm region. The detection system
uses up to seven of our HR2000+ High-resolution Miniature Fiber Optic Spectrometers, each with a
2048-element linear CCD array. All spectrometers are triggered to acquire and read out data
simultaneously. The detectors in the broadband (200-980 nm) LIBS2500plus collect the signal; software
included with the system displays and identifies the emission spectrum.
Advantages of Broadband LIBS Techniques
Many LIBS systems have a small spectral range. The LIBS2500plus is the first to provide broadband
spectral analysis. Because the system is noninvasive, you can perform real-time measurements in situ, in
hostile industrial, chemical and biochemical environments with little or no sample preparation.