Multimode communications systems
First Claim
1. Apparatus for connecting an optical transceiver to multimode optical fibre in a multimode optical fibre communications system, the apparatus comprising:
- a transmission part adapted for receiving outgoing optical radiation admitted to the apparatus from an optical source of the optical transceiver at a radiation input into a single mode optical fibre of the transmission part and adapted for transmitting said outgoing radiation out into a first multimode optical fibre of the multimode optical fibre communications system after passage through the single mode optical fibre, said single mode optical fibre being of sufficient length such that said outgoing radiation transmitted into said first multimode optical fibre is substantially single mode radiation, and;
a reception part adapted for receiving incoming optical radiation admitted to the apparatus from a second multimode optical fibre of the communications system into a multimode optical fibre of the reception part and adapted for transmitting said incoming radiation into a receiver of the optical transceiver.
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Accused Products
Abstract
A method and apparatus is provided for connecting an optical source to a multimode optical fibre in a multimode optical fibre communications system. A single mode fibre length is provided such that optical radiation admitted from an optical source at one end of the single mode fibre length is provided to a multimode optical fibre at the other end of the single mode fibre length. This method and apparatus is used in a duplex patchcord for connecting an optical transceiver to a pair of installed multimode fibres. The second fibre in the patchcord is a multimode fibre for passing optical signals to the optical receiver of the transceiver.
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Citations
35 Claims
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1. Apparatus for connecting an optical transceiver to multimode optical fibre in a multimode optical fibre communications system, the apparatus comprising:
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a transmission part adapted for receiving outgoing optical radiation admitted to the apparatus from an optical source of the optical transceiver at a radiation input into a single mode optical fibre of the transmission part and adapted for transmitting said outgoing radiation out into a first multimode optical fibre of the multimode optical fibre communications system after passage through the single mode optical fibre, said single mode optical fibre being of sufficient length such that said outgoing radiation transmitted into said first multimode optical fibre is substantially single mode radiation, and;
a reception part adapted for receiving incoming optical radiation admitted to the apparatus from a second multimode optical fibre of the communications system into a multimode optical fibre of the reception part and adapted for transmitting said incoming radiation into a receiver of the optical transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Communications device for use in an multimode fibre optical communications system, comprising an optical transceiver and an apparatus comprising:
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a transmission part adapted for receiving outgoing optical radiation admitted to the apparatus from an optical source of the optical transceiver at a radiation input into a single mode optical fibre of the transmission part and adapted for transmitting said outgoing radiation out into a first multimode optical fibre of the multimode optical fibre communications system after passage through the single mode optical fibre, said single mode optical fibre being of sufficient length such that said outgoing radiation transmitted into said first multimode optical fibre is substantially single mode radiation, and;
a reception part adapted for receiving incoming optical radiation admitted to the apparatus from a second multimode optical fibre of the communications system into a multimode optical fibre of the reception part and adapted for transmitting said incoming radiation into a receiver of the optical transceiver. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. Communications system comprising an optical transceiver and first and second multimode optical fibres for receiving outgoing optical radiation from and supplying incoming optical radiation to the optical transceiver respectively, the optical transceiver and the first and second multimode optical fibres being connected by a connecting apparatus, the connecting apparatus comprising:
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a transmission part adapted for receiving outgoing optical radiation admitted to the connecting apparatus from an optical source of the optical transceiver at a radiation input into a single mode optical fibre of the transmission part and adapted for transmitting said outgoing radiation out into the first multimode optical fibre after passage through the single mode optical fibre, said single mode optical fibre being of sufficient length such that said outgoing radiation transmitted into said first multimode optical fibre is substantially single mode radiation, and;
a reception part adapted for receiving incoming optical radiation admitted to the connection apparatus from the second multimode optical fibre into a multimode optical fibre of the reception part and adapted for transmitting said incoming radiation into a receiver of the optical transceiver. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for connecting an optical transceiver to multimode optical fibre in a multimode optical fibre communications system, comprising:
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connecting the optical transceiver to first and second multimode optical fibres of the multimode optical fibre communications system with a connecting apparatus comprising a transmission part adapted for receiving outgoing optical radiation admitted to the apparatus from an optical source of the optical transceiver at a radiation input into a single mode optical fibre of the transmission part and adapted for transmitting said outgoing radiation out into a first multimode optical fibre of the mulitmode optical fibre communications system after passage through the single mode optical fibre, said single mode optical fibre being of sufficient length such that said outgoing radiation transmitted into said first multimodule optical fibre is substantially single mode radiation, and a reception part adapted for receiving incoming optical radiation admitted to the apparatus from a second multimode optical fibre of the communications system into a multimode optical fibre of the reception part and adapted for transmitting said incoming radiation into a receiver of the optical transceiver, wherein outgoing radiation is transmitted from an optical source of the optical transceiver through the transmission part of the connecting apparatus to a first multimode fibre of the multimode optical fibre communications system, and incoming radiation is transmitted from a second multimode optical fibre of the multimode optical fibre communications system through the reception part of the connecting apparatus to an optical receiver of the optical transceiver.
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Specification