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US 4,784,466 AGranted
Optical transmission system comprising a radiation source and a multipleclad monomode optical transmission fibre with a negative-step index profile
AssigneeU.S. Philips Corporation
InventorsGiok D. Khoe, Peter K. Bachmann
Life of this patent
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Abstract
An optical transmission system is described which comprises a radiation source (30) and a multiple-clad monomode optical transmission fibre (10) with a negative-step index profile. In order to improve the efficiency of coupling the radiation from the source into the transmission fibre a single-clad-monomode transmission fibre (20), whose end portion which faces the source is tapered, is arranged between the source and said fibre.
Claims6
An optical transmission system comprising a radiation source;
- a multiple-clad monomode optical transmission fibre with a negative-step index profile;
- and a single-clad monomode optical transmission fibre, having a tapered core characterized by a first refractive index, arranged between the multiple-clad monomode optical transmission fibre and the radiation source.
Dependencies are inferred from the claim text.