Reduction of polarization dependence in optical systems
OwnerRoger Lee Jungermaninventor
Life of this patent
Estimating the term…
Abstract
Reduction of polarization dependence in optical systems. Polarization dependence is reduced by splitting an input signal into two halves spatially using a split-plate which bisects the optical beam. One half of the split-plate is a waveplate with a retardance of approximately ½ wave which rotates the signal 45 degrees with respect to the polarization axis. The other half of the split-plate is a delay plate which does not rotate the polarization state. Since half the beam is rotated orthogonal to the other half, the average of maximum and minimum polarization state signals will be observed.
Claims10
A compensator for placing in the path of an optical beam for compensating for polarization dependent loss in an optical device, the compensator comprising:
- a waveplate bisecting the optical beam, and
- a delay plate bisecting the optical beam.
The method for compensating for polarization dependent loss in an optical beam in an optical device, comprising:
- rotating the polarization state of a first portion of the optical beam by 90 degrees using a waveplate, and
- delaying a second portion of the optical beam by an amount similar to the delay introduced by the waveplate using a delay plate.
Dependencies are inferred from the claim text.