US5090802A
Expired / Lapsed
US
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Optical measurement system
Assignee: Balfour Beatty PLC
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Filing: 1990-08-03
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Granted: 1992-02-25
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Expires: 2010-08-03
Abstract
Abstract An optical measurement system is disclosed which enables rapid and repeatable measurement of insertion and return loss of each fiber in sequence of a multi-fiber connector 15 connected to an optical fiber ribbon 16 to be obtained without disturbing either the light source 17, 18 or detector components 19, 20 of the system. The system comprises a multi-channel optical switch 1 for connection to a light source 17, 18; 1×2 bi-directional splitters 2 each of which is optically coupled between one of the channels of the multi-channel optical switch and one fiber of a master multi-fiber connector 3, of which the geometry is known, for mating with a multi-fiber connector to be tested and, for connection to at least one detector for monitoring and recording the power reflected at the interface between a pair of optical fibers interconnected by the mating of the master multi-fiber connector and the multi-fiber connector under test, and a splitter 11 to which each of the bi-directional splitters 2 is also optically coupled.
Inventors
- 👤 Philip C. Longhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:14
CPC Classifications
G; G01; G01M; G01M11/00; G01M11/30; G01M11/31; G01M11/3109; G01M11/3154; G01M11/3136
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
160 words
An optical measurement system by means of which can be obtained rapid and repeatable measurements of insertion and return loss of each fibre in sequence of a multi-fibre connector which is connected to an optical fibre ribbon and which is suitable for mating with a multi-fibre connector of complementary form, which optical measurement system comprises: a multi-channel optical switch for connection to a source of light; a plurality of 1×2 bi-directional splitters each of which is directly optically coupled between one of the channels of the multi-channel optical switch and one fibre of a master multi-fibre connector for mating with a multi-fibre connector to be tested and, for connection to at least one detector for monitoring and recording the power reflected at the interface between a pair of optical fibres interconnected by the mating of the master multi-fibre connector and the multi-fibre connector under test; and a common splitter to which each of said bi-directional splitters is also optically coupled.
Claim 2
Dependent Claim
160 words
An optical measurement system by means of which can be obtained rapid and repeatable measurements of insertion and return loss of each fibre in sequence of a multi-fibre connector which is connected to an optical fibre ribbon and which is suitable for mating with a multi-fibre connector of complementary form, which optical measurement system comprises: a multi-channel optical switch for connection to a source of light; a plurality of 1×2 bi-directional splitters each of which is directly optically coupled between one of the channels of the multi-channel optical switch and one fibre of a master multi-fibre connector for mating with a multi-fibre connector to be tested and, for connection to at least one detector for monitoring and recording the power reflected at the interface between a pair of optical fibres interconnected by the mating of the master multi-fibre connector and the multi-fibre connector under test; and a common splitter to which each of said bi-directional splitters is also optically coupled.
Claim 3
Dependent Claim
42 words
An optical measurement system as claimed in claim 1, wherein the optical fibre ribbon connected to the multi-fibre connector under test is optically coupled to at least one detector for monitoring and recording the insertion loss between said pair of optical fibres.
Claim 4
Dependent Claim
29 words
An optical measurement system as claimed in claim 1, wherein the optical fibre ribbon connected to the multi-fibre connector under test is terminated by means for reflecting no light.
Claim 5
Dependent Claim
25 words
An optical measurement system as claimed in claim 3, wherein said means for reflecting no light is an index matching liquid contained in a cell.
Claim 6
Dependent Claim
25 words
An optical measurement system as claimed in claim 3, wherein said means for reflecting no light is an index matching semi-liquid contained in a cell.
Claim 7
Dependent Claim
18 words
An optical measurement system as claimed in claim 1, further comprising a microprocessor for automatically operating said system.
Claim 8
Dependent Claim
76 words
An optical measurement system as claimed in claim 2, further comprising: at least one detector, optically coupled to said common splitter, for monitoring and recording the power reflected at the interface between said pair of optical fibres interconnected by the mating of the master multi-fibre connector and the multi-fibre connector under test connected to the common splitter, and wherein each detector of the system includes means for automatic collation and analysis of data received and recorded.
Claim 9
Dependent Claim
34 words
An optical measurement system as claimed in claim 1, wherein said multi-channel optical switch includes means for connection to any one of at least two sources of light of wavelengths differing from one another.
Claim 10
Dependent Claim
34 words
An optical measurement system as claimed in claim 8, wherein said common splitter includes means for connection to at least two detectors, each appropriate to one of said at least two sources of light.
Claim 11
Dependent Claim
180 words
An optical measurement system by means of which can be obtained rapid and repeatable measurements of insertion and return loss of each fibre in sequence of a multi-fibre connector which is connected to an optical fibre ribbon and which is suitable for mating with a multi-fibre connector of complementary form, which optical measurement system comprises: a multi-channel optical switch including means for connection to a source of light; a master multi-fibre connector for mating with a multi-fibre connector to be tested and having a plurality of fibres connected thereto; a plurality of 1×2 bi-directional splitters, each of which is directly optically coupled between one of said plurality of fibres connected to said master multi-fibre connector and one of said channels of said multi-channel optical switch; a common splitter optically coupled to each of said bi-directional splitters; and at least one detector for monitoring and recording the power reflected at the interface between a pair of optical fibres interconnected by said master multi-fibre connector and the multi-fibre connector under test, said at least one detector being attached to said common splitter.
Claim 12
Dependent Claim
180 words
An optical measurement system by means of which can be obtained rapid and repeatable measurements of insertion and return loss of each fibre in sequence of a multi-fibre connector which is connected to an optical fibre ribbon and which is suitable for mating with a multi-fibre connector of complementary form, which optical measurement system comprises: a multi-channel optical switch including means for connection to a source of light; a master multi-fibre connector for mating with a multi-fibre connector to be tested and having a plurality of fibres connected thereto; a plurality of 1×2 bi-directional splitters, each of which is directly optically coupled between one of said plurality of fibres connected to said master multi-fibre connector and one of said channels of said multi-channel optical switch; a common splitter optically coupled to each of said bi-directional splitters; and at least one detector for monitoring and recording the power reflected at the interface between a pair of optical fibres interconnected by said master multi-fibre connector and the multi-fibre connector under test, said at least one detector being attached to said common splitter.
Claim 13
Dependent Claim
42 words
An optical measurement system as claimed in claim 10, wherein the optical fibre ribbon connected to the multi-fibre connector under test is optically coupled to at least one detector for monitoring and recording the insertion loss between said pair of optical fibres.
Claim 14
Dependent Claim
27 words
The optical measurement system as claimed in claim 11, wherein each detector of the system incudes means for automatic collation and analysis of data received and recorded.
Claim 15
Dependent Claim
29 words
An optical measurement system as claimed in claim 10, wherein the optical fibre ribbon connected to the multi-fibre connector under test is terminated by means for reflecting no light.
Claim 16
Dependent Claim
25 words
An optical measurement system as claimed in claim 13, wherein said means for reflecting no light is an index matching liquid contained in a cell.
Claim 17
Dependent Claim
25 words
An optical measurement system as claimed in claim 13, wherein said means for reflecting no light is an index matching semi-liquid contained in a cell.
Claim 18
Dependent Claim
18 words
An optical measurement system as claimed in claim 10, further comprising a microprocessor for automatically operating said system.
Claim 19
Dependent Claim
34 words
An optical measurement system as claimed in claim 10, wherein said multi-channel optical switch includes means for connection to any one of at least two sources of light of wavelengths differing from one another.
Claim 20
Dependent Claim
34 words
An optical measurement system as claimed in claim 17, wherein said common splitter includes means for connection to at least two detectors, each appropriate to one of said at least two sources of light.
References Cited (Backward Citations)
US4409476A
Cited
US4445086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |