Optical fibre structure

Details Optical fibre structure Optical fibre structure

1988-08-23

1990-05-15

Lee, John D.

350 9615, 350 9629, G02B 622

Patent

active

049252690

ABSTRACT:
An electrically tunable optical fibre structure comprising a length of optical fibre which includes two uniformly spaced monomode optical cores (1,2) located within a common cladding (4) so as to provide two optical guidance paths, the optical characteristics of at least the cores being different such as to give the two guidance paths different propagation constants the values of which coincide for a predetermined wavelength, so that optical energy at said wavelength will repeatedly transfer from one core to the other, characterized in that two electrodes (6,8,20) are provided within the cladding and are located with at least one core between them for applying an electrical field to that core whereby to alter its propagation constant by the electro-optic effect and hence to alter said wavelength, the structure thereby being tunable. Methods of making such a structure are also disclosed.

REFERENCES:
patent: 4315666 (1982-02-01), Hicks, Jr.
patent: 4478489 (1984-10-01), Blankenship et al.
patent: 4480897 (1984-11-01), Okamoto et al.
patent: 4515436 (1985-05-01), Howard et al.
patent: 4714312 (1987-12-01), Thaniyavarn
Special Optical Fibers by Simon B. Poole and David N. Payne Optical Fibre Group, Department of Electronics and Computer Science, The University, Southampton, Hampshire, SO9 5NH, UK.

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