Echelle Diffraction Gratings

Echelle Diffraction Gratings

Echelle Replica Gratings

Echelle replica gratings are special low period gratings designed for use in high orders only. The maximum possible resolution is obtained but, in general, it is necessary to use a second grating or prism to separate out the overlapping diffracted orders. Echelle replica gratings are an ideal solution for high-resolution spectroscopy due to their high blaze angles.

Pulsed 350 milli-joules/ cm2 @ 200 n sec.
CW 40 watts/cm2

Pulsed 3.5 joules/ cm2 @ 200 n sec.
CW 80 watts/cm2

Pulsed 3.5 joules/ cm2 @ 200 n sec.
CW 250 watts/cm2

Any standard Optometrics grating is available with either P-type or CW-type construction for higher damage thresh­old performance. They can also be produced on substrates with a lower coefficient of thermal expansion (Low CTE) for better stability. No damage threshold minimums apply to gratings with an overcoat.

Optometrics develops hybrid grating and optical filter for holographic weapons sight.

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Need Low CTE and P-type Holographic Gratings?

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