FIELD: physics.
SUBSTANCE: device is made from solid transparent material. The device has in the central part a core with an elliptical or circular shape, formed by surrounding it with longitudinal holes. The holes surround the core in one layer. Two holes have a larger distance between them compared with the other holes. There is an additional hole opposite said holes. The light guide can also have one or more additional layers of holes around said layer, wherein in each layer, the holes lie equidistant from the nearest two holes of the previous layer. The cross-section of the light guide has not more than one plane of symmetry which passes through the axis of the light guide.
EFFECT: wider field of use of the light guide owing to possibility of obtaining a high value of birefringence with negligible difference in size of the mode field of the light guide in two orthogonal directions.
2 cl, 10 dwg
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