Circular birefringent dielectric wave guide

Details Circular birefringent dielectric wave guide Circular birefringent dielectric wave guide

1989-05-31

1990-10-16

Gonzalez, Frank

350 9630, G02B 622

Patent

active

049629948

ABSTRACT:
The wave guide has an annular core region divided into an integral number times eight annular sectors. Respective alternate sectors are of a first type 5 having a substantially constant refractive index and a second type 6 having a refractive index which varies substantially in inverse proportion to the square of the distance from the longitudinal axis 3 of the wave guide. The wave guide is twisted about the axis 3 such that the sectors 5, 6 extend helically. The circular birefringence of the wave guide is improved by the sectors 6 having a different elasto-optic coefficient under torsional stresses to that of the sectors 5.

REFERENCES:
patent: 4717225 (1988-01-01), Feth et al.
patent: 4758066 (1988-07-01), Someda

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