| 摘要 |
Optical devices are described. These devices incorporate a walk-off arrangement along the device length configured for simultaneously moving orthogonal polarization components of a first light signal in at least first and second orthogonal directions. The walk-off configuration includes a junction formed between confronting members which define the first and second orthogonal walk-off directions. The walk-off arrangement defines the first and second orthogonal directions such that the orthogonal polarization components of the first light signal are moved in directions which include a component of movement away from the junction. In this way, contact of the polarization components with the junction attributable to beam spreading is avoided. Moreover, the component of movement away from the junction may serve to compensate for beam spreading in other layers and/or for movement in other layers of the polarization components towards one or more junctions defined in the other layers.
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