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US 4,181,515 AGranted
Method of making dielectric optical waveguides
AssigneeThe Post Office
InventorsRichard B. Dyott, John L. Stevenson
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AssigneeThe Post Office
InventorsRichard B. Dyott, John L. Stevenson
Estimating the term…
An opto-electronic element consists of a dielectric optical waveguide having a single crystal core of meta-nitroaniline. The element is made by feeding molten meta-nitroaniline into a hollow fibre along which a temperature gradient exists. Nucleation sets in at one end of the fibre and the temperature gradient is altered to promote crystal growth along the fibre. The element can be used as a polarizer, in isolators, harmonic generators or mixers. The action of the device depends on either the non-linear optical properties of the meta-nitroaniline or the optical anisotropy of the meta-nitroaniline. To make a polarizer the meta-nitroaniline core is surrounded by a cladding having a refractive index lying midway between two of the refractive indices of the meta-nitroaniline.
A method of making a dielectric optical waveguide element having a cladding and a single crystal core comprising feeding a core material in molten form into a very fine capillary fiber of a cladding material along which a temperature gradient is established, said temperature gradient extending both above and below the temperature at which said core material melts, such that said material nucleates at a point in said fiber, and cooling said fiber so that said molten material solidifies as a single crystal.
Dependencies are inferred from the claim text.