Transmission Gratings

Ibsen Fused Silica Transmission Gratings are the ideal choice for applications ranging from high power lasers to telecom devices to compact spectrometers

Diffraction gratings are used either as beam splitting elements (e.g. Phase masks) or as dispersion elements for wavelength separation. Ibsen fused silica transmission gratings are the ideal grating choice for a wide range of applications:

  • Telecom devices such as Wavelength Selective Switches (WSS), Tunable Filters (TF) and Optical Channel Monitors (OCM)
  • High power laser applications such as pulse stretching / compression, spectral beam combining or beam-splitting
  • Compact spectrometers for absorption spectroscopy, fluorescence spectroscopy, Raman spectroscopy, OCT and color measurements


Ibsen’s fused silica grating technology was developed by Ibsen in the mid 90’s and has continuously evolved ever since. Ibsen’s gratings are characterized by being 100% dielectric, surface relief etched transmission gratings, and offer many advantages:

  • Environmentally stable as no coatings, polymers or epoxies are used
  • Low thermal expansion coefficient
  • Low temperature sensitivity
  • Highest energy / power damage threshold
  • Transmission gratings provide more flexibility in the optical design than reflection gratings – choice of beam path, multiple gratings
  • Ideal in cases where the input location must be spatially separated from the detector location
  • Combined wavelength dispersion and beam folding elements
  • Absence of complex absorption issues provides more homogenous DE values over the spectral band
  • Holographic or lithographic exposure, etched gratings
  • High diffraction efficiency combined with high dispersion
  • High tolerance to illumination angle of incidence
  • Low stray light

Product overview

Ibsen makes gratings for many other applications too. If you find that your fused silica transmission grating application is missing, just specify your grating requirement / request a quotation here.