Round birefraction dielectric wave-guide

Details Round birefraction dielectric wave-guide Round birefraction dielectric wave-guide

G - Physics

02

B

88/97.2

G02B 6/10 (2006.01)

Patent

CA 1269264

ABSTRACT OF THE DISCLOSURE ROUND BIREFRACTION DIELECTRIC WAVE-GUIDE A round birefraction dielectric wave-guide has in section a central round zone with a constant, or substant- ially constant, refractive index n1, an outer zone prefer- ably with a constant refractive index n2 and an intermediate zone divided into 8 (or multiples of 8) angular sectors. Respective alternate sectors have refractive indices n3 and n4. Refractive index n3 may be constant but index n4 varies in inverse proportion to the square of the distance from the axis of the waveguide. N1 is greater than n2, n1 is greater than n3 and n4 lies between n1 and n2. The wave-guide is subjected to torsion around the longitudinal axis of symmetry thereof and/or is spirally wound around a cylinder.

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