PGL Launches Nonpolarizing MLD Diffraction Gratings for Directed Energy

CARVER, Massachusetts / February 1, 2023 – Plymouth Grating Laboratory (PGL), the leading commercial manufacturer of large, high-performance diffraction gratings for lasers and laser systems, announced that it has launched a new product line for Spectral Beam Combining (SBC) of High Energy Lasers (HEL) used in Directed Energy applications.

These Multilayer Dielectric (MLD) reflection gratings achieve extremely high diffraction efficiency (typically 96 – 99%) over a broad spectral bandwidth (> 50 nm at 1055 nm) for all polarizations, making them ideal for high-power, efficient nonpolarizing fiber laser systems.

“PGL’s unique grating designs combined with our proprietary thin-film coating processes and fabrication know-how enable us to produce SBC gratings that not only exhibit extreme performance, but also are highly manufacturable for reproducible results time after time,” said PGL’s President, Turan Erdogan.

The new products utilize the same, proven MLD grating technology for pulse compression PGL has been delivering to the world’s premier ultrahigh-intensity laser facilities and OEM laser manufacturers for over 15 years.

The gratings are available in standard sizes from 50 mm round to 100 mm x 100 mm square. Custom sizes including dimensions > 150 mm are also available. The gratings can be made on a variety of substrate materials, including fused silica, ultralow-thermal expansion glasses and ceramics, and single-crystal silicon.

About Plymouth Grating Laboratory, Inc. – PGL is dedicated to making the highest-quality diffraction gratings available today. The company’s 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 its 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. For more information, visit plymouthgrating.com.