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Laser Components is offering a range of diffraction gratings from Optometrics for applications such as instrumental analysis, astronomical technology and laser systems.

With full replication capabilities, gratings can be produced on float glass, Pyrex or Zerodur and can be coated using aluminium, achieving an average reflectance of 90 per cent from 200nm to the far infrared, dropping to 85 per cent between 750nm and 900nm.

However, in some fibre-optic applications when maximum reflectance in the near infrared is required, a gold over-coating is used — achieving 96 per cent and 98 per cent over 2µm.

Laser Components can also offer a range of standard filters, wire-grid polarisers (both ruled and holographic) and beam splitters.

Factors to consider when choosing a grating

  • Efficiency — Laser Components can offer both ruled and holographic forms; ruled gratings offer a higher efficiency than holographic forms, so ruled gratings may be suitable for applications involving fluorescence and reactions induced by radiation
  • Blaze wavelength — holographic gratings exhibit a flatter spectral response, whereas ruled gratings have a sharp peak around the blaze wavelength caused by their ‘sawtooth’ profile; users requiring a narrow wavelength range may benefit from the company’s ruled gratings
  • Wavelength range — depending on the groove spacing, both ruled and holographic gratings share the same spectral range with the same grating constant; twice the grating period is equal to the maximum wavelength the grating can achieve
  • Stray light — holographic gratings demonstrate low-stray light; it is for this reason that when the signal-to-noise ratio is critical, for example in Raman spectroscopy, a holographic grating would be beneficial
  • Resolving power — resolving power is identical for both forms of gratings; however, holographic gratings are available in up to 3,600 grooves per millimetre, while ruled gratings do not normally exceed 1,200 grooves per millimetre

Laser Components

The Laser Components Group was formed in 1986 and is located at six locations in Germany, France, UK, Canada and USA, employing more than 120 people worldwide. In-house production accounts for approximately half its turnover, with partner suppliers accounting for all other business.

Laser Components manufactures and supplies components, OEM modules, sources, optics and detectors, spanning the UV to the FIR. 

Products include:  

  • Photodiodes, including avalanche photodiodes, position sensitive detectors and PIN diodes
  • IR components, including IR detectors, IR emitters and optical components for IR
  • Single photon-counting modules, including accessories and silicon avalanche photodiodes for photon counting
  • Lasers, including laser diodes, laser modules and emitters for telecommunication
  • Measurement devices, including amplifiers, laser power detectors, and measurement instruments
  • Fibre optics, including optical fibres, assembled fibres, active and passive components and accessories
  • Optics, including laser optics, optical filters, optomechanical components, optical components and polarisers
  • Laser accessories, including laser safety products and spare parts and accessories
  • E-beam (physical vapour deposition) ion-assisted deposition and sputtering coating capabilities to the standard catalogue or customer-specific specifications.  

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