EP0105753A2
Expired / Lapsed
EP
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Fiber optic coupling apparatus
Assignee: Xerox Corp
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Filing: 1983-09-30
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Granted: —
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Expires: 2003-09-30
Abstract
Abstract Apparatus for coupling a station to a linear fiber-optic network fiber (47) is described. The apparatus comprises four two-fiber biconical couplers (43,44,45,46), two (43, 46) for coupling light arriving in each direction to a light detector (D), and two (44,45) for coupling light from a light source (L) to the fiber (47) in both directions. The light source may be either two separate light sources (L 1 ,L 2 ) or a single source (L) with the light split into two fibers to the two couplers by means of a uniconical coupler (54). Similarly, one detector (D) and a uniconical coupler (55), or two detectors (D,, D 2 ) may be used. The network fiber may be a single fiber optic fiber (47) carrying light in both directions or two fibers, one for each direction. In all cases, the couplers are arranged so that the detectors can detect an incoming message while the local transmitter is transmitting.
Inventors
- 👤 Eric Gordon Rawson
- 👤 Robert Eugene Norton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 07:55
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/27; H04B10/272; H04B10/2725
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
Fiber-optic apparatus for transmitting messages in, and detecting messages from, both directions on a one-fiber or a two-fiber linear network, characterised in that it comprises two pairs of two-fiber couplers, one pair for feeding data in opposed directions into the network and the other pair for detecting data arriving on the network from opposed directions.
Claim 2
Dependent Claim
55 words
Fiber-optic apparatus for transmitting messages in, and detecting messages from, both directions on a one-fiber or a two-fiber linear network, characterised in that it comprises two pairs of two-fiber couplers, one pair for feeding data in opposed directions into the network and the other pair for detecting data arriving on the network from opposed directions.
Claim 3
Dependent Claim
112 words
Fiber-optic apparatus according to claim 1 for coupling a station comprising a light transmitter means (L) and a light detector means (D) onto a linear fiber-optic network (47) comprising a first two-fiber coupler (43) for coupling light arriving on the fiber in a first direction to said detector means (D), a second two fiber-coupler (46) for coupling light arriving on the fiber in a second direction to said detector means (D), a third two-fiber coupler (45) for coupling light onto the fiber in the first direction from said transmitter means (L), and a fourth two-fiber coupler (44) for coupling light onto the fiber in the second direction from said transmitter means (L).
Claim 4
Dependent Claim
102 words
Fiber-optic apparatus according to claim 1 comprising coupler means for coupling two transmitters (L l , L 2 ) and two detectors (Di, D 2 ) to a two-fiber linear network (21, 22) so that both detectors can detect incoming messages during a transmission by either transmitter comprising, for each fiber, an upstream two-fiber coupler (20 or 25) for coupling data from the fiber (21 or 22) to a detector (D 2 or D l ), and a downstream two-fiber coupler (18 or 19) for coupling data from a transmitter (L 2 or L 1 ) to the fiber (22 or 21).
Claim 5
Dependent Claim
77 words
Fiber-optic apparatus according to claim 1 adapted to simultaneously transmit messages in both directions on a two-fiber linear network (21,22) and detect messages arriving in either direction, comprising a detector means (D), a transmitter means (L), an upstream two-fiber coupler (20,25) on each fiber (21,22) for coupling data from said fibers to said detector means (D), and a downstream two-fiber coupler (18,19) on each fiber (22,21) for coupling data from said transmitter means (L) to said fibers.
Claim 6
Dependent Claim
51 words
The apparatus of claim 4 wherein said detector means (D) comprises a uniconical two-fiber coupler (23) for coupling data from both upsteam couplers (20,25) to one light detector, and wherein said transmitter means (L) comprises a uniconical two-fiber coupler (24) for coupling data from one transmitter to both downstream couplers (18,19).
Claim 7
Dependent Claim
148 words
Fiber-optic apparatus according to claim 1 comprising coupler means for coupling two transmitters (L 1 ,L 2 ) and two detectors (D 1 ,D 2 ) to a one-fiber linear network (47) so that both detectors can detect messages during a transmission by either transmitter comprising a first two-fiber coupler (44) for coupling data from a first transmitter (L I ) onto said fiber in a leftward direction, a second two-fiber coupler (43) for coupling data arriving on said fiber from the left to a first detector (D 1 ), a third two-fiber coupler (46) for coupling data arriving on said fiber from the right to a second detector (D 2 ), and a fourth two-fiber coupler (45) for coupling data from a second transmitter (L 2 ) onto said fiber in a rightward direction, said first through fourth couplers being arranged in any order on said fiber.
Claim 8
Dependent Claim
129 words
A fiber-optic appartus according to claim 1 adapted to simultaneously transmit messages in both directions on a one-fiber linear network (47) detect messages arriving in either direction, comprising a detector means (D), a transmitter means (L), a first two-fiber coupler (44) for coupling data from said transmitter means (L) onto said fiber in a leftward direction, a second two-fiber coupler (43) for coupling data arriving on said fiber from the left to said detector means (D), a third two-fiber coupler (46) for coupling data arriving on said fiber from the right to said detector means (D), and a fourth two-fiber coupler (45) for coupling data from said transmitter means onto said fiber in a rightward direction, said first through fourth couplers being arranged in any order on said fiber.
Claim 9
Dependent Claim
64 words
The apparatus of claim 7 wherein said transmitter means (L) comprising a light transmitter and a uniconical two-fiber coupler (54) for coupling the light output of said transmitter to said first and fourth couplers (44,45) and said detector means (D) comprises a light detector and a uniconical two-fiber coupler (55) for coupling the light from said second and third couplers (43,46) to said detector.
Claim 10
Dependent Claim
134 words
Fiber-optic apparatus according to claim 1 including four couplers for coupling a transmitter (L) and a detector (D) to a one-fiber linear network (17), said couplers comprising a first two-fiber coupler (13) for coupling the light from said transmitter (L) onto said fiber in a leftward direction, a second two-fiber coupler (15) for coupling data arriving on said fiber from the left to said detector, a third two-fiber coupler (16) for coupling data arriving on said fiber from the right to said detector, a fourth two-fiber coupler (14) for coupling the light from said transmitter onto said fiber in a rightward direction and wherein said transmitter (L) is connected in series with said first and fourth couplers (13,14) and wherein said detector (D) is connected in series with said second and third couplers (15,16).
Claim 11
Dependent Claim
146 words
Fiber-optic apparatus according to claim 1 including four couplers for coupling a transmitter (L) and a detector (D) to a two-fiber linear network (48,49) said couplers comprising a first two-fiber coupler (51) for coupling the light from said transmitter (L) onto a first fiber (48) in a first direction, a second two-fiber coupler (50) for coupling data arriving on said first fiber (48) in the first direction to said detector (D), a third two-fiber coupler (53) for coupling data arriving on a second fiber (49) in a second direction to said detector (D), a fourth two-fiber coupler (52) for coupling the light from said transmitter (L) onto said second fiber in the second direction, and wherein said transmitter (L) is connected in series with said first and fourth couplers (51,52) and wherein said detector (D) is connected in series with said second and third couplers (50,53).
References Cited (Backward Citations)
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