• Made of calcite crystals
• Designed for different GVD compensation ranges
• Clear aperture Ø12 mm (up to Ø20 mm are available on request)
• Mounted into 1" ring holder

We offer Group Velocity Delay (GVD) compensation plates designed for specified ranges of time delay compensation ranges between two different wavelength pulses with orthogonal polarizations. Compensation plate can be adjusted for the precisely desired delay by the angular tuning, changing the Angle Of Incidence (AOI) of the laser beams to the plate. Standard delay compensation plates are adjusted for required compensation by angular tuning changing the angle of incidence. The recommended AOI tuning range of the plate is from -10° to +10°.

Standard GVD compensation plates are rectangular (full aperture 16x14 mm) with a clear aperture of Ø12 mm. They are supplied mounted into Ø25.4 mm (1") ring holders. Calcite plates with clear apertures up to Ø20 mm can be produced on special requests.

The optical axis of calcite plates is at the particular orientation, which is not parallel to the faces of the plate. Thus walk-off effect for e-polarized beam and both beams displacement at non-zero AOI should be considered in the real application conditions. The plane of optical axis is parallel to the long 16 mm edge of the calcite plate and is marked on the ring holder.

Time delay compensators for custom wavelengths, specific delay values, as well as plates made of Alpha-BBO crystals are available on request.