PCB Polarizer Module

VA-FFB Variable Attenuator using PBB and RZB module

Walk-Off Polarizers, precision polished calcite blocks, are specifically designed for construction of polarization independent systems and other optical devices. 

For complete separation of S and P, beam diameter cannot exceed Clear Aperture, otherwise overlap will occur.  The most common application of Walk-Off Polarizers is in a 1x2 splitter configuration. See photos below.  These Polarizers are capable of handling extremely high optical powers, and have extremely wide bandwidth and the highest polarization ratio of all types of polarizers.  For additional information on other polarizers, see PRECISION OPTICAL COMPONENTS.

*Wavelength Coating 425 - 675 nm VIS 630 - 860 nm NIR1 780 - 850 nm NIR2 900 - 1125 nm YAG 1200 - 1400 nm IR1 1400 - 1625 nm IR2

Retarders
An OFR Crystal Quartz Zero-Order or Achromatic Retarder in a Rotating Base comprises the Retarder Module. 1/4-Wave and 1/2-Wave Retarders are available for all standard laser wavelengths. These Zero-Order Retarders have the widest bandwidth (6 nm) and highest extinction potential (10⁴ -10 ⁵ ) of all types of retarders.  In order to function in as many applications as possible, the Retarders are mounted in a Rotating Cell with engraved angle-index.  The 1/4-Wave Retarder produces circularly polarized light. It is used with a 1/2-Wave Retarder to construct a Polarization Controller. The 1/2-Wave Retarder is generally used to control rotation of the plane of polarization.  OFR Retarders are manufactured to the exact wavelength of intended use, and all surfaces are AR coated. Therefore, when ordering, specify wavelength of operation.  Click for additional information on these and other Retarders.

Catalog Number Description Insertion Loss Aperture RZB-1/4-λ 1/4-wave zero order <0.1 dB 4 mm RZB-1/2-λ 1/2-wave <0.1 dB 4 mm RMAB-1/4-IR 1/4-wave, 1200-1600 nm <0.1 dB 4 mm RMAB-1/2-IR 1/2-wave, 1200-1600 nm <0.1 dB 4 mm λ : when ordering , specify wavelength, for example RZB-1/2-1310.

RZB mounted on FB-51 with PAF

Attenuators
An OFR Neutral Density Filter, mounted in Fixed Component Base, comprises the dB Attenuator Module. These are available in dB attenuation steps of 3, 6, 10, 20, 30 and 40 dB.  Any of these can be added in series to achieve higher attenuation values. For example, 20 dB plus 30 dB yield a total of 50 dB. This is easily achieved by setting the Modules onto the Component Stage.  Components are tilted to prevent back reflection.  Both the FiberBench and FiberTable are designed to accept several Modules.

FDB modules in fiber-fiber coupling table. Catalog Number Attenuation Steps (dB) FDB-(dB) 3 6 10 20 30 40 Transmittance 0.5 0.2 10 -1 10 -2 10 -3 10 -4 Note: Order as FDB-20, for example.