Optical amplifier having a doped fluoride glass optical fibre and process for producing this amplifier
AssigneeFrance Telecom Etablissement Autonome de Droit Public
InventorsDaniel Ronarc'H, Marcel Guibert, Houmed Ibrahim
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Abstract
An optical amplifier having a doped fluoride glass optical fiber and a process for producing such an amplifier. To produce the doped fluoride glass fiber amplifier which is operable to amplify a light signal (S), an optical multiplexer (4) is produced having on the one hand two silica fibres (6, 8) and on the other a fluoride glass fiber (2), whereof at least one section is doped and an optical coupling is brought about between the fluoride glass fiber and at least one other silica fibre (12, 14).
Claims9
Optical amplifier incorporating a fluoride glass optical fibre doped in such a way as to be able to amplify a light signal (S) when a pumping radiation (P) is injected into the doped fluoride glass fibre, said amplifier comprising:
- a 2 to 1-type optical multiplexer (4) having a side with first and second silica optical fibres (6, 8) and another side with a single fluoride glass optical fibre (2, 30-28-32) having a section that is doped in such a way as to constitute said doped fluoride glass fibre, said multiplexer adapting the mode diameter of the first and second silica fibres to the mode diameter of the fluoride glass fibre,
- a third silica optical fibre (12, 14) and
- an optical coupling means (10) between the third silica fibre and the fluoride glass fibre, said coupling means serving to adapt the mode diameter of said third silica fibre to the mode diameter of the fluoride glass fibre, the light signal (S) passing from one of said first and third silica fibres located on an input side of the amplifier to the other of said first and third silica fibres located on an output side of said amplifier, whilst the pumping radiation (P) passes through the second silica fibre of the amplifier.
Process for the production of an optical amplifier incorporating a fluoride glass optical fibre doped so as to be able to amplify a light signal (S) when a pumping radiation (P) is injected into the fluoride glass fibre, said process comprising the steps of:
- providing a 2 to 1-type optical multiplexer (4) having a side with first and second silica optical fibres (6, 8) and another side with a fluoride glass optical fibre (2, 30-28-32) having a section that is doped so as to constitute said doped fluoride glass fibre, said multiplexer serving to adapt the mode diameter of the first and second silica fibres to the mode diameter of the fluoride glass fibre and
- optically coupling the fluoride glass fibre (2, 30-28-32) and a third silica optical fibre (12, 14), said coupling being carried out in such a way as to adapt the mode diameter of said third silica fibre to the mode diameter of the fluoride glass fibre.
Dependencies are inferred from the claim text.