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Scientist looking at an image of the human brain with nerve fibers made visible Scientist looking at an image of the human brain with nerve fibers made visible

IR Spectroscopy is a Powerful Tool to identify molecular Compositions.

Material Analysis / Infrared Spectroscopy


As a powerful tool, spectroscopy has allowed for a finer understanding of the world. Spectrometers allow light to be broken down into its individual wavelengths and used for precise measurement. As a specific wavelength range passes through a sample, electromagnetic radiation is then absorbed or emitted by the target. Based on the spectral response, these measurements can help identify the exact molecular composition.


a single measurement - a lot of information

Spectrophotometry is a powerful method used for analyzing a sample for the presence of many unknown constituents in a single measurement. Choosing the right detectors is crucial, as accurate measurements are only possible provided that the desired absorption features are in the wavelength range of the detector.

Spectrometers can be built with many different methods using arrays, single point detectors, monochromators, prisms, gratings, and other configurations. 


Speed up the Detection with Fourier-Transform Infrared Spectroscopy

Fourier Transform Infrared (FTIR) spectroscopy is the method for collecting spectral data over a wide range with a high spectral resolution. 

Unlike traditional spectroscopy techniques using prisms, gratings, and monochromatic sources, FTIR uses a broadband IR source in combination with a Michelson interferometer to speed up the scan process. To identify the material of the sample, the frequency spectrum must be analyzed. With the help of the mathematical Fourier transformation technique, it is possible to get the specific frequencies of interest from the measured interferogram.

The precision of these scans is highly dependent on an accurate frequency reference, often provided by a known laser source. Photoconductive and pyroelectric detectors  are used for the near and longer wave infrared respectively

IR Detectors

Areas of Use

What can be measured?

To identify the various substances that might be inspected through spectroscopy, it is critical to match the right components. LASER COMPONENTS offers a wide range of IR detectors with various materials that include PbS, PbSe, InGaAs and InAs for photodetectors, while DLaTGS and LiTaO3, are available for pyroelectric detectors. Each option opens a window into possible applications with each detector type having its own response range and sensitivity. 

Some of the popular areas of use for spectrometers include:

  • Environmental Analysis
  • Biomedical Diagnostics
  • Astronomy
  • Chemical Analysis
  • Gas Monitoring
  • Security
  • Forensics
  • Food Inspection
  • Material Inspection
Spectroscopy in Food Safety Application Spectroscopy in Food Safety Application

SPectroscopy in Food Safety Applications

Glycol in wine, motor oil in olive oil, horse meat in lasagne – food scandals cause outrage among the population with uncanny regularity; however, these major scandals are only the tip of the iceberg. At the top of the counterfeiters’ popularity list is olive oil. 

The Maxfry company, which is located in Hagen, Germany, has developed a process that detects manipulated olive oils with a probability of over 95% – and in a very short time. The basis for this information is provided by data collected with a Fourier transform NIR spectrometer from the Bruker company.

Read the whole story

InGaAs photodiodes are particularly well suited for use in FT-NIR spectroscopy. With a spectral response from 850 nm to 2.6 µm, the photodiodes of the IG26 series cover almost the entire wavelength range of the near infrared. LASER COMPONENTS manfactures InGaAs PIN photoidodes in Arizona, USA. 

PIN detectors are a good choice for TDLAS applications

Beneficial Information

the IR World

Visualisation Tunable Diode Laser Absorption Spectroscopy (TDLAS) Visualisation Tunable Diode Laser Absorption Spectroscopy (TDLAS)


If you want to know more about Tunable Laser Absorption Spectroscopy, TDLAS

click here


If you want to know more about the most commonly used gas detection method

click here


LASER COMPONENTS USA - Your competent partner for optical and optoelectronic components in the United States.

Welcome to LASER COMPONENTS USA, Inc., your expert for photonics components. Each product in our wide range of detectors, laser diodes, laser modules, optics, and more is worth every Dollar ($/USD). Our customized solutions cover all conceivable areas of application: from sensor technology to medical technology. You can reach us here:

116 South River Road
Building C
Bedford, NH 03110

Phone: +1 603 821 7040
Email: info(at)

Team of experts
You have questions or need our support?
Please call us.
Jim Dell
Sales Account Manager / IR Components
Jim Dell
03110 Bedford, NH
Mark Mitchell
Sales Associate / IR Components
Mark Mitchell
03110 Bedford, NH
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Laser Components

116 South River Road
Building C
Bedford, NH 03110

Phone: +1 603 821 7040

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