Patent EP0189273A2 successfully refreshed from Google Patents.
EP0189273A2
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EP
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Fiber optic network with reduced coupling losses
Assignee: Westinghouse Electric Corp
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Filing: 1986-01-16
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Granted: —
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Expires: 2006-01-16
Abstract
Abstract @ In order to avoid coupling losses, a fiber optic network employs wavelength sensitive devices to couple signals to a bus and split signals from the bus. A terminal device connected to the bus has an optical transmitter which produces signals at a wavelength that is different from the wavelengths employed in optical transmitters of other terminal devices connected to the bus. Furthermore the light is modulated to obtain a frequency channel identifying one or more terminal devices which are to receive messages from the bus. The bus is connected to a repeater which translates between wavelength and frequency channel. Frequency channels may be obtained by amplitude modulating or frequency modulating the light.
Inventors
- 👤 Harold Barry Shutterly
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:34
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/25; H04B10/27; H04B10/278; H04J; H04J14/00; H04J14/02; H04J14/0201
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
177 words
A fiber optic network with means to minimize optical coupling losses, comprising: a plurality of terminal devices, each terminal device having an optical receiver to convert optical messages from other terminal devices into optical form and having an optical transmitter to convert electrical messages to optical form for transmission to other terminal devices, said optical transmitter including means for emitting light at a wavelength that is different from the wavelengths employed by the optical transmitters of other terminal devices, and means for modulating the light at a frequency corresponding to the terminal device which is to receive the message, characterized by an optical bus, said bus including a first transmission line having wavelength coupler means for accepting light at different wavelengths from the optical transmitters and a second transmission line having wavelength splitter means for distributing light at different frequencies to the optical receivers; and repeater means connecting the first and second transmission lines for converting an optical message at a first wavelength and second frequency to an optical message at a second wavelength and first frequency.
Claim 2
Dependent Claim
177 words
A fiber optic network with means to minimize optical coupling losses, comprising: a plurality of terminal devices, each terminal device having an optical receiver to convert optical messages from other terminal devices into optical form and having an optical transmitter to convert electrical messages to optical form for transmission to other terminal devices, said optical transmitter including means for emitting light at a wavelength that is different from the wavelengths employed by the optical transmitters of other terminal devices, and means for modulating the light at a frequency corresponding to the terminal device which is to receive the message, characterized by an optical bus, said bus including a first transmission line having wavelength coupler means for accepting light at different wavelengths from the optical transmitters and a second transmission line having wavelength splitter means for distributing light at different frequencies to the optical receivers; and repeater means connecting the first and second transmission lines for converting an optical message at a first wavelength and second frequency to an optical message at a second wavelength and first frequency.
Claim 3
Dependent Claim
14 words
The network of claim 1, wherein said wavelength coupler means comprises an optical multiplexer.
Claim 4
Dependent Claim
20 words
The network of claim 2, wherein said wavelength coupler means additionally comprises. an optical demultiplexer optically connected to said demultiplexer.
Claim 5
Dependent Claim
14 words
The network of claim 1, wherein said wavelength splitter means comprises an optical demultiplexer.
Claim 6
Dependent Claim
20 words
The network of claim 4, wherein said wavelength splitter means additionally comprises an optical multiplexer optically connected to said demultiplexer.
Claim 7
Dependent Claim
19 words
The network of claim 1, wherein said means for modulating the light comprises means for amplitude modulating the light.
Claim 8
Dependent Claim
19 words
The network of claim 1, wherein said means for modulating the light comprises means for frequency modulating the light.
Claim 9
Dependent Claim
65 words
The network of claim 1, wherein said repeater means comprises an optical demultiplexer optically connected to said first transmission line, an optical multiplexer optically connected to said second transmission line, receiver means connected to said optical demultiplexer for regenerating optical messages into electrical form, and transmitter means connecting said receiver means and said optical multiplexer for generating optical messages from the messages in electrical form.
Claim 10
Dependent Claim
35 words
The network of claim 8, wherein said receiver means comprises a plurality of receiver sections, each receiver section corresponding to a respective terminal device, and optical fibers connecting each receiver section to the optical multiplexer.
Claim 11
Dependent Claim
25 words
The network of claim 9, wherein each receiver section comprises a plurality of channel receiver portion means for responding to electrical signals at different frequencies.
Claim 12
Dependent Claim
17 words
The network of claim 10, wherein said channel receiver portion means comprises means for detecting AM signals.
Claim 13
Dependent Claim
17 words
The network of claim 10, wherein said channel receiver portion means comprises means for detecting FM signals.
Claim 14
Dependent Claim
35 words
The network of claim 10, wherein said transmitter means comprises a plurality of transmitter sections, each transmitter section corresponding to a respective terminal device, and optical fibers connecting each transmitter section to the optical multiplexer.
Claim 15
Dependent Claim
24 words
The network of claim 13, wherein each receiver section comprises a plurality of channel transmitter portion means for emitting electrical signals at different frequencies.
Claim 16
Dependent Claim
17 words
The network of claim 14, wherein each channel transmitter portion means comprises means for generating AM signals.
Claim 17
Dependent Claim
16 words
The network of claim 15, wherein each transmitter portion means comprises means for generating FM signals.
References Cited (Backward Citations)
No citation records indexed.
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