Wavelength resonant fused fibre coupler
AssigneeNorthern Telecom Limited
InventorThomas John Cullen
Life of this patent
Estimating the term…
Abstract
A wavelength selective 2.times.2 single mode fibre coupler has a weakly coupled coupling region n which the cladding modes of the two fibres are coupled while the core modes remain uncoupled. A matched pair of core/cladding mode converters are located, one on one fibre on one side of the coupling region, and the other on the other fibre on the other side.
Claims11
A wavelength selective fibre coupler having first and second single mode optical fibres each capable of supporting a core mode and a cladding mode, which coupler is provided with a coupling region through which the core mode of each fibre propagates in a manner effectively uncoupled with the core mode of the other fibre, and in which coupling region the cladding modes of the fibres are optically coupled, which coupler additionally includes a matched pair of spectrally selective resonant core/cladding mode converters provided respectively on the first and second optical fibres respectively upstream and downstream of the coupling region.
Dependencies are inferred from the claim text.