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EOT Broadband Faraday Rotator/Isolator
V. Tuning your Faraday Isolator
A. 5mm Aperture Model.
For the 5mm aperture device, there are only two configurations for the input polarization. In order to switch between the two, the input and output polarizer dust covers must be removed, then the polarizer mounts must be removed and rotated 90 deg. Caution must be taken during this operation to avoid attraction of a screwdriver to the aperture of the device and the potential damage to the optics. For more details, please contact the sales department at EOT at sales@eotech.com.
B. 8mm Aperture Model.
For the 8mm aperture device, the cylindrical magnet body is clamped into the base clamp structure. The polarization adjustment screw may be loosened and the cylindrical isolator structure rotates freely inside the clamp. The preferred method for alignment is to use an external polarizer mounted to a fine rotation stage with known directional axes and a waveplate to rotate the polarization before entering the test polarizer. By crossing this polarizer with the input polarizer of the device, a precise input polarization may be realized to a known reference orientation.
C. 10mm Aperture Model.
The 10mm aperture model has a square cross-section and has mounting screw holes located orthogonal to the propagation direction. The input polarization may be tuned to only two positions by physically picking the device up and setting it back down on its side in the same position. The apertures are centered on the cross-section. Therefore, no alignment is needed following the 90 deg. rotation of the device.
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