Profile: Leysop Ltd manufactures and supplies electro-optic components. We supply GT model Glan-Taylor polarizers with apertures from 10-20mm and larger. Side faces are fine ground as standard, which is adequate to disperse the internally reflected polarization state. Polished side exit faces are provided if required and are recommended for all high power applications. The standard interface angle makes the polariser suitable for operation across a wide wavelength range. Other interface angles can be ordered to cover requirements across the full transmission range of calcite from 0.2 - 2.5µm. It produces a high extinction ratio with low reflection losses and a high power handling capability. It is therefore particularly useful for polarising laser light. For some applications it is more convenient however to have the S and P polarized beams exit the device at 90° to each other. EM 200A low voltage electro-optic light modulator is a low voltage ADP transverse modulator designed to operate at all wavelengths in the visible and is entirely free from piezo-electric resonances. This modulator has a high degree of temperature stability, but where long term d.c. amplitude is required it should be operated in a constant temperature environment. The modulation frequency is not limited by the device characteristics other than by its electrical capacitance and therfore depends on the drive circuit used. Wide band ar-coatings are used on all components.