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Patent US4103154A successfully refreshed from Google Patents.
US4103154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical branching device and method of manufacturing the same
Assignee: Thales SA
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Filing: 1977-01-26
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Granted: 1978-07-25
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Expires: 1997-01-26
Abstract
Abstract The invention relates to optical communications by bundles of optical fibres. More particularly, the invention relates to a branching fiber optic connector device for optically and mechanically connecting two bundles of optical fibres with a single optical fibre and for supplying an electrical signal characteristic of the incident optical energy obtained by extracting part of the radiation in said fibre by means of a photodiode sealed to said fibre after removal of the cladding over a surface corresponding to the detecting surface of the photodiode, the refractive index of the sealing material being higher than the refractive index of the cladding.
Inventors
- 👤 Luigi d'Auria
- 👤 Andre Jacques
- 👤 Philippe Maillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/50; G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/2808; G02B6/42; G02B6/4201; G02B6/4251; G02B6/4286; G02B6/4287
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
An electro-optical branching device for picking up a fraction of optical radiation and converting the latter into an electrical signal, said device comprising a casing, a single optical fibre comprising an inner core and an outer cladding and having two ends, said outer cladding comprising a lateral opening, said casing surrounding said fibre and forming around said two ends mechanical connecting ferrules for connection to complementary ferrules, said device further comprising a photodetector element placed in said casing, said element having a sensitive area facing said opening and being fixed to said core through said opening by a sealing material to transmit said fraction of optical radiation; the refractive index of said sealing material being at least equal to that of said cladding.
Claim 2
Dependent Claim
123 words
An electro-optical branching device for picking up a fraction of optical radiation and converting the latter into an electrical signal, said device comprising a casing, a single optical fibre comprising an inner core and an outer cladding and having two ends, said outer cladding comprising a lateral opening, said casing surrounding said fibre and forming around said two ends mechanical connecting ferrules for connection to complementary ferrules, said device further comprising a photodetector element placed in said casing, said element having a sensitive area facing said opening and being fixed to said core through said opening by a sealing material to transmit said fraction of optical radiation; the refractive index of said sealing material being at least equal to that of said cladding.
Claim 3
Dependent Claim
17 words
An electro-optical branching device as claimed in claim 1, wherein said photodetector element is a silicon photodiode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |