TECH FOCUS SPECTROSCOPY
Up to spec
Shining a light on the latest photonics products and solutions in the spectroscopy space
S
pectroscopy is the study of the absorption and emission of light by matter.
It involves splitting the light into its constituent wavelengths in a similar way to a prism. The technique is most often used to study the structures of atoms and molecules, which emit large numbers of wavelengths and so allow for the detailed investigation of their structures. It is widely used in science and academia thanks to benefits such as sensitivity, safety, non- invasiveness, cost-effectiveness and sample speed. It is a broad field that has a number of sub- disciplines, each with different spectroscopic techniques. Components for spectroscopy include light sources, such as halogen, xenon and deuterium, depending on the wavelength range and application. Non- dispersive materials are used to filter out any non-targeted ranges of wavelengths from the source to improve resolution, while dispersive materials used include diffraction gratings and prisms. Other components include optical fibre cables.
Commercial
products Vendors of products and solutions for spectroscopy include Armadillo SIA, a manufacturer of specialised optical fibre, subassemblies, and hybrid photonic solutions. The company’s fibres are used in a wide range of spectroscopy applications including chemical processing, pollution and contaminant monitoring, and pharmaceutical testing. Its bundles for NIR spectroscopy are also widely implemented in food and chemical analysis. Art photonics specialises in
the development and production of speciality fibre products for a
38 Electro Optics November 2022
broad spectrum from 300nm to 16µm. Polycrystalline mid-infrared (PIR-) fibres and metal coated silica fibres are used for the assembly of various spectroscopy probes for medical diagnostics and industrial process control, and in volume production for medical and industrial lasers. Avantes specialises in high-end
fibre-optic spectroscopy systems that facilitate measurements in the ultra-violet, visible, and near-infrared wavelengths. The company can offer instruments with a small form factor to integrate into other devices as part of its CompactLine range, while high-sensitivity instruments for more demanding applications are available as part of the SensLine range. Spectrometers especially configured for the near-infrared range can be found in the NIRLine suite, and StarLine spectrometers are designed to be versatile for general spectroscopy applications. CeNing Optics is an optical company that produces high- quality optical components. Products include prisms, lenses, windows, beamsplitters, wave plates, polarisers, mirrors, and filters. Both standard and custom designs are available. Coherent offers a broad range of spectroscopy lasers, designed to provide the perfect match for LIBS, MALDI-TOF, Raman, CARS, SRS, LA-ICP-MS, and more. The company’s extended raman range includes narrow-line lasers, filters, and complete modules, including THz-Raman tools, while its MALDI-TOF range can maximise TOF resolution with the short (~1ns) pulse flare ytterbium laser. The flexible LA-ICP-MS range can analyse solid samples with maximum mass resolution using a femtosecond laser amplifier. Delta Photonics is a distributor of lasers, optics, instruments, optomechanics, and scientific cameras. The
company provides spectroscopy equipment for applications such as LIBS, Raman, fluorescence, phosphorescence, photoluminescence, plasma emission, transmission, absorption, and reflectance. Spectrometers can be miniature fibre optic or large flexible systems. The company carries products from partners including Avantes, Applied PhotoPhysics, Edinburgh Instruments and Teledyne Princeton Instruments. GWU-Lasertechnik’s range
of CCD-based spectrometers has a number of features to fulfil a variety of applications. The
detection range covers the UV to near-infrared spectrum and reaches out to the mid-infrared at 2µm. Models are available with a very small footprint, and thermo- electric (TE) cooled devices with high resolution, high sensitivity and ultra-low noise for weak- light applications – such as fluorescence sensing or Raman analysis – can also be offered. Hamamatsu Photonics offers
more than 20 different types of spectrometers, covering the UV to NIR ranges. Its mini-spectrometers are compact and low-cost spectrometers (polychromators). Suitable for applications such
@electrooptics |
www.electrooptics.com
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