High efficiency gratings
When ordering a grating, please use the following example format, or choose from the list of predefined gratings below.

PC 1200 W x H x Thk 800 nm (TM/-1) constant deviation ≤10°

• PC stands for pulse compression
• 1200 is the groove density (groove frequency) in grooves/mm
• W is the blank dimension in mm parallell with the grating grooves
• H is the blank dimension in mm perpendicular to the grating grooves
• Thk is the blank thickness in mm
• 800 nm is the desired optimised wavelength. A range or range with peaked wavelength can also be specified
• (TM/-1) is desired polarisation state and diffraction order the grating should be optimised for. TE and average (TM+TE)/2 can also be specified
• Constant deviation 10° is the configuration the grating should be optimised for. Constant incidence angle can also be specified

Standard tolerances on W, H: ± 0.2 mm, Thk ± 0.5 mm. CA > 90 % of each dimension.

Standard sizes: 25 x 25 x 6 mm, 30 x 30 x 6 mm, 30 x 64 x 10 mm, 30 x 75 x 16 mm, 30 x 110 x 16 mm, 50 x 50 x 10 mm, 50 x 110 x 16 mm, 58 x 58 x 10 mm, 64 x 64 x 10 mm, 90 x 90 x 16 mm, 110 x 110 x 16 mm, 100 x 140 x 20 mm, 120 x 140 x 20 mm

Materials: Gold coating (Au) standard for λ > 750 nm.

Standard substrate material: Optical crown glass K4A or N-ZK7.

Optional substrate material: “Zero” thermal expansion glass ceramic, marked (Z) in table. (Lw1, Zerodur or equivalent material).

Other specifications available on request, contact our sales department!

Standard grating products. For stock info, please contact our sales department.

Note: The absolute efficiency curves shown are only representative for the stated geometry and wavelength(s) and can vary depending on use geometry and measurement technique.

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