Optical tap having a v-shaped recess within the range of from 152.degree. t o .degree.
First Claim
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1. Optical tap apparatus for coupling light including a range of wavelengths into, or out of, an optical fibre substantially independent of wavelength, the apparatus comprising:
- an optical head having a V-shaped recess, andan abutment member disposed for movement towards and away from the apex of said V-shaped recess to deform the optical fibre into the apex of said recess,the recess being shaped and sized to subject the optical fibre to a tight curve of short arcuate length when the fibre is deformed into the recess whereby light over a range of wavelengths can be coupled into, or out of, the optical fibre at a punctiform region of its curved portion, wherein the angle at the apex of the V-shaped recess is within the range of from 152°
to 179°
to provide coupling that is substantially independent of wavelength.
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Abstract
An optical tap comprises a transparent acrylic block (1) having a single V-shaped recess (2) into which an optical fibre (3) is urged by a member (4). The resulting kink in the fibre (3) enables light to couple between the core of the fibre and the block (1) from what is substantially a point source defined by a tight curve of short arcuate length at the kink.
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Citations
20 Claims
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1. Optical tap apparatus for coupling light including a range of wavelengths into, or out of, an optical fibre substantially independent of wavelength, the apparatus comprising:
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an optical head having a V-shaped recess, and an abutment member disposed for movement towards and away from the apex of said V-shaped recess to deform the optical fibre into the apex of said recess, the recess being shaped and sized to subject the optical fibre to a tight curve of short arcuate length when the fibre is deformed into the recess whereby light over a range of wavelengths can be coupled into, or out of, the optical fibre at a punctiform region of its curved portion, wherein the angle at the apex of the V-shaped recess is within the range of from 152°
to 179°
to provide coupling that is substantially independent of wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification