Polarization Rotator

Polarization Rotator

Material Crystalline quartz
Diameter tolerance +0/-0.2 mm
Thickness tolerance ±0.2 mm
Surface quality 20-10 S-D
Transmitted wavefront distortion (TWD) <λ/8 @ 632.8 nm
Parallelism error <10 arcsec
Rotation accuracy <5 arcmin
Coatings AR (R<0.2 %) on each surface
Laser damage threshold >10 J/cm2 for 10 ns pulses @ 1064 nm
Mounting Mounted in 25.4 mm black anodized metal mount
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Polarization rotator is a good alternative to retardation waveplate when it comes to rotation of polarization at certain angle. Polarization rotation is caused by property, called Optical activity, which is natural to quartz crystal and other substances that are enantiomorphous. This property is caused by crystal lattice structure, that lacks mirror symmetry due to helicoidal chains of SiO4 units oriented along c-axis in quartz structure. Depending on chain rotation direction, there is “right” and “left” quartz which rotates polarization clockwise or counter-clockwise respectively. Polarization rotators are c-cut so rotation of polarization occurs independently of component’s rotation around optical axis, thus component is alignment-insensitive and the only requirement is that incident beam must be perpendicular to rotator’s aperture. Altechna offers rotators with fixed 45 deg or 90 deg rotation of polarization with antireflection coatings for design wavelength. For convenient use all rotators are mounted in black anodized aluminum mount. Device is good replacement for waveplate, for usage along with narrow band lasers.
varna Convenient replacement of half-wave plate for narrow waveband laser
varna No need for special adjustment
varna Coated with antireflection coatings
varna Rotates polarization at a fixed angle
varna Custom rotation angle available
varna Counter-clockwise rotation by request
varna Rotators without mounting by request
varna Rotators for custom wavelengths available

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Items per page page
Clear aperture, mm Polarization rotation (clockwise), deg Designed wavelength (DWL), nm Thickness with mount, mm Delivery Product ID Price Action
>18 45 355 6 Request 2-CPR-18-45-355 Request REQ
>18 90 1064 20 Request 2-CPR-18-90-1064 Request REQ
>18 45 1064 12 Request 2-CPR-18-45-1064 Request REQ
>18 45 532 6 Request 2-CPR-18-45-532 Request REQ
>18 90 532 8 Request 2-CPR-18-90-532 Request REQ
>18 90 355 6 Request 2-CPR-18-90-355 Request REQ

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