Phase Retarding CO₂ Laser Mirrors

These phase-retarding mirrors are intended for use with CO₂ lasers.  They use all-dielectric coatings on Silicon substrates.  The coating precisely controls the relative phase between incoming and outgoing beams in order to control the state of polarization.

For a linearly polarized input beam, retardation of 45° produces a circularly polarized output with improved beam focusing.  A retardation of 90° will rotate the plane of polarization by 90°.  In order to maintain an existing state of polarization, 0° retardation should be chosen. 

These mirrors are optimised for use at 10.6 μm wavelength and 45° angle of incidence.  They are designed to have at least 98.5% reflectance.  Standard diameters are 25.4, 27.9, 38.1 and 50.8 mm.  Thickness varies from 3 to 5 mm as required to preserve the flatness specification.

Please contact us about any special coating requirements.

Datasheet              Inquiry