LIBS2500 laser-induced decay spectrometer
The LIBS2500 Laser-Induced Breakdown Spectrometer is a detection system that allows real-time qualitative measurement of elements in solids, solutions, and gases. This broad-spectrum, high-resolution system provides a spectral analysis range of 200-980 nm with an optical resolution of ~0.1 nm (FWHM). A high-intensity, pulsed laser beam is focused on the sample surface over a range from a few centimeters to one meter. A 10-nanosecond-wide laser pulse excites the sample. When the laser fires, the high temperature of the laser generates a plasma. As the plasma decays or cools (~1.0 microsecond after the laser pulse), excited-state atoms in the plasma emit light at wavelengths characteristic of the sample's elements. The wavelength range is 200-980 nm. The detection system can simultaneously use up to 7 HR2000 high-resolution miniature fiber optic spectrometers for simultaneous measurement (reading and writing data), each with a 2048-pixel linear CCD array. The LIBS2500 detector collects the broad spectrum from 200-980 nm and transmits it to the application software to display the data. Traditional LIBS detection systems provide a narrow spectral range, whereas the LIBS2500 is the first system to provide broadband spectral analysis. Owing to good safety protection, users can perform on-site real-time measurements, including in harsh industrial, chemical, and biomedical environments, without sample preparation. Because the LIBS2500 uses Ocean Optics' HR2000 high-resolution miniature fiber optic spectrometers, the system is portable and can be connected to a computer via a USB port. The LIBS2500 laser has two options, both of which are products of Big Sky, a pioneer in the laser industry. Laser melting and plasma formation are very unique for different samples, so different samples have different energy requirements. In most applications we use a Q-switched 1064nm Nd:YAG laser. If multiple functions are required, we recommend using a 200mJ laser with an attenuator, which can adjust the laser energy according to the sample. The choice of laser energy and wavelength will depend on the material and the degree of permissible damage. The LIBS-LASER uses a 50mJ CFR Nd:YAG laser, targeting metal and thin-film samples. The LIBS-LAS200MJ uses a 200mJ CFR Nd:YAG laser and is suitable for glass and high-OH materials. For liquid samples, a dual-wavelength laser can be used; oxidizing substances in the sample will slow the formation of the plasma, so another laser is needed to enhance plasma formation.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Spectral Range | 200-980 nm |
| Resolution (FWHM) | 0.1 nm (FWHM) |
| Detection | 14,336-pixel CCD |
| Frame rate [Computer controlled] | Computer controlled 10 Hz |
| Composite time [Variable in free mode] | 2.1 milliseconds; variable in free mode |
| Trigger delay [in 500 nanoseconds; user controlled] | In 500 nanoseconds -121 microseconds to +135 microseconds, user controlled |
| Trigger jitter | +/-250 nanoseconds |
| Trigger level [TTL] | TTL greater than 5.5 V |
| Computer connection | USB 1.1 or USB 2.0 |
| Software | OOILIBS and OOICOR |
| Power requirements [<1 amp; power supply included; <1 amp, power supply included] | 5 volts @ <1 amp, power supply included |
| Input fiber | 7 fibers, 2 long (other lengths also available), with 74UV calibration mirror and sampling lens |
| Dimensions [spectrometer only] | 130 mm a 150 mm x 140 mm (spectrometer only) |
| Weight | 6.36 kg(14 lb) |
Applications
Key Features
Datasheet
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