PGL designs and manufactures the right diffraction grating
specifically for your laser or laser system.

Multilayer Dielectric (MLD)

The combination of PGL’s grating and thin-film coating design and fabrication provide unbeaten diffraction efficiency, damage threshold, and wavefront error for the world’s largest ultrahigh-intensity lasers as well as rapidly expanding commercial lasers. Learn More »

High Energy Laser (HEL) Spectral Beam Combining (SBC)

PGL is the leading commercial supplier of gratings that are proven to meet the performance requirements of Directed Energy HEL systems. Learn More »


PGL pioneered gold-on-etched-glass gratings for the most demanding broadband, femtosecond Ti:Sapphire and OPCPA lasers. These gratings offer the highest laser damage threshold and can even be refurbished at a relatively low cost if damaged. Learn More »


Like MLDs, hybrids comprise an all-dielectric grating over a high-reflecting mirror, resulting in good laser damage thresholds, only the mirror is metal instead of dielectric, resulting in broad spectral bandwidths like metal on glass gratings. Learn More »


Exceptionally uniform and deep etching processes enable repeatable, uniform, low-wavefront-error gratings with excellent diffraction efficiency into a single transmitted order. Learn More »

Two-dimensional (2D)

The SBIL process enables PGL to fabricate gratings with extreme linearity, or accuracy, as well as highly controlled diffraction efficiency in multiple dimensions and polarizations. Learn More »

Plymouth Grating Laboratory is dedicated to making the highest-quality diffraction gratings available today. Our focus is on lasers and laser systems. PGL gratings offer exceptionally high diffraction efficiency and laser damage threshold, combined with superior wavefront error and uniformity over large areas. This performance is made possible by PGL’s exclusive use of the Nanoruler, based on the proprietary Scanning Beam Interference Lithography technology developed at MIT, and PGL’s industry-leading process expertise. The company occupies 20,000 sq. ft. of dedicated manufacturing, engineering, and office space in Carver, MA, just outside of Plymouth, and about 45 miles south of Boston.

5 Commerce Way, Carver, MA 02330, USA|+1.508.503.1719|

© 2024 Plymouth Grating Laboratory|All rights reserved|Design by