VPH Grating Design Technologies

The perfect OEM grating partner

The founders of Wasatch Photonics began writing volume phase gratings in dichromated gelatin close to 50 years ago, and no one does it better. We draw on this experience along with our multiple patented designs and 3 distinct design technologies to optimize each grating for your unique application needs.

Why Choose Us?

What Sets Us Apart:
  • Multiple patented & comprehensive design technologies
  • Deliver of high first-order efficiency across wide bandwidths
  • Full customization in wavelength (320–2500 nm), dispersion (150–6000 lines/mm) and size (from a few mm to several hundred mm)
  • Grism options for expanded design flexibility
  • Optimized gratings to exact end-user requirements with a robust design that supports easy cleaning and handling

We offer patented, high-efficiency, fully customizable gratings with robust and flexible design options.

Principal Design Approaches

OCT: HD 1800 l/mm @ 840nm

High Dispersion & Efficiency HD Gratings

  • Exclusive, patented design available only from Wasatch Photonics
  • Consistently high transmission over bandwidths up to 200 nm
  • Low polarization sensitivity, smoothly varying efficiency
  • Enables faster, smaller imaging instruments with greater clarity
  • Increased full bandwidth throughput for hyperspectral imaging
  • Customizable for AOI's >36° and wavelengths 300-2500 nm

High Transmission Dickson Gratings

  • We are the original patent holders and experts on this design!
  • Extremely high transmission over bandwidths of 20-60 nm
  • Efficiency is high for both s- & p-polarization, and varies smoothly
  • Ideal for astronomy: supports angle tuning & large dimensions
  • Enables high dispersion spectroscopy with low polarization sensitivity
  • Customizable for AOI's >36° and wavelengths 300-2500 nm
Dickson: D1800 l/mm @ 840nm
Single Pol: 1800 l/mm @ 840nm

Single & Standard Polarization Gratings

  • Capable of exceptionally high transmission at a single polarization
  • Can also be designed as broad bandwidth & polarization insensitive
  • Can be manufactured in dimensions up to 300 mm or larger
  • Good for astronomy, hyperspectral imaging, and laser filtering
  • Ideal for laser pulse compression: minimal beam distortion & scatter
  • Customizable for many AOI's and wavelengths 300-2500 nm

Grisms

Enabling the size reduction and complexity of your optical design

A grism is a compound optical element composed of a Grating and prism(s). It is a dispersive element that permits an in-line optical layout by cleverly exploiting the differences between gratings and prisms. The prism deflects violet light more than red, while a diffraction grating deflects red more than violet. By combining the two, light can be separated into its components while canceling out the beam deviations caused by each element. Light is dispersed, but the impact to overall direction of beam travel is minimized, reducing impact on the optics of your system.

At Wasatch Photonics, we design and manufacture custom VPH grating-based grisms matched to your application needs. We can select and control the groove density and prism(s) used to create the desired dispersion and output angle(s) for your wavelength(s) of interest.

Features & Benefits

  • Achieve dispersion without beam deviation
  • Getting the geometry you need
  • Optimize your grating efficiency
  • Increase grating design options
  • Correct for spectral aberrations e.g. ‘smile’

Ready to Start Your Project?

Whether you need a standard or fully customised product, our team is ready to help.

Misty Johnson

Misty Johnson is responsible for taking care of our grating customers at the Logan, Utah, facility. She has been a member of the Wasatch Photonics team since 2009. By understanding her customers’ needs and goals, as well as the current grating market, Misty is able to provide a superior level of customer support. As Account Manager, she acts as a liaison between customers and Wasatch Photonics’ manufacturing department making sure that the lines of communication are always open.

Customer support is an integral part of Wasatch Photonics commitment to customers. Whether you are in the market to purchase a single grating, inquiring as a distributor, or purchasing large volume, Misty will guide you seamlessly through the custom design process. Misty strives to build trust and strong long term relationships with Wasatch Photonics customers. She brings 20 years’ experience as customer support manager from a number of manufacturing and service companies.