Pockels Cells are important electro-optic device which exploit the pockels effect. Applying a constant or varying voltage (electric field) on Electro-Optic Crystals can cause the crystal birefringence to change linearly.
Silicon is used as an optical window primarily in the 3 to 5 micron band and as a substrate for production of optical filters. Large blocks of Silicon with polished faces are also employed as neutron targets in Physics experiments.
Optically, Crystalline Quartz is used extensively as a wave retardation medium. The birefringent properties of Quartz are of use in quarter-wave plates and in polarisers. Quartz should not be processed or used at temperatures greater than 490 °C. Crystalline quartz is also used for electronic filters and resonators. However, Crystran Ltd. does not deal in material for this application.
Rutile is a high index material used for coupling prisms.
A Surface Acoustic Wave (SAW) device is a device that transfers the input electrical signal into acoustic signal through the converse piezoelectric effects or vice versa.SAW devices provide wide application possibilities across the fields of radio and television, mobile and wireless telephone, satellite communication, GPS system, identification system.
ZnS Multispectral (water-clear) is used for IR windows and lenses in the thermal band (8 to 14 μm) where maximum transmission and lowest absorption is required. Also selected for use where visible alignment is an advantage.
ZnSe is used widely for IR components, windows and lenses, and for spectroscopic ATR prisms. Zinc Selenide is one of the materials of choice for CO2 laser optics operating at 10.6 microns.