Patent US4475788A successfully refreshed from Google Patents.
US4475788A
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US
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Coupling between laser and optical fiber
Assignee: Leonardo SpA
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Filing: 1982-01-21
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Granted: 1984-10-09
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Expires: 2002-01-21
Abstract
Abstract In order to focus the beam of a laser onto a receiving end of an optical fiber substantially coaxial therewith, the laser output is formed by a planoconvex lens with a semitransparent flat face confronting the laser cavity and an antireflecting curved face turned toward the fiber. Alignment of the laser beam with the fiber axis is accomplished by the adjustment of two oppositely pointing juxtaposed wedges interposed between the lens and the laser.
Inventors
- 👤 Maurizio Tomassini
- 👤 Eugenio Penco
- 👤 Angelo Tranquilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4219; G02B6/422; G02B6/4227; G02B6/26; G02B6/262; G02B6/4204; G02B6/4206; H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08059
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
In a light-transmitting system including a laser with a cavity having an output end for the emission of a luminous beam, an optical fiber having an input end confronting said output end, and refractive means for focusing said beam onto said output end, the improvement wherein said refractive means comprises a converging lens at said output end having a semireflecting face turned toward said cavity, and micrometrically adjustable afocal means interposed between said lens and said input end for enabling alignment of said beam with the fiber axis.
Claim 2
Dependent Claim
88 words
In a light-transmitting system including a laser with a cavity having an output end for the emission of a luminous beam, an optical fiber having an input end confronting said output end, and refractive means for focusing said beam onto said output end, the improvement wherein said refractive means comprises a converging lens at said output end having a semireflecting face turned toward said cavity, and micrometrically adjustable afocal means interposed between said lens and said input end for enabling alignment of said beam with the fiber axis.
Claim 3
Dependent Claim
16 words
The improvement defined in claim 1 wherein said lens is planoconvex, said semireflecting face being planar.
Claim 4
Dependent Claim
18 words
The improvement defined in claim 2 wherein said lens has an antireflecting convex face confronting said input end.
Claim 5
Dependent Claim
36 words
The improvment defined in claim 1, 2 or 3 wherein said afocal means comprises a pair of relatively movable wedges converging in opposite directions, said wedges being provided with support means rotatable about the fiber axis.
Claim 6
Dependent Claim
17 words
The improvement defined in claim 4 wherein said wedges have identical angles of convergence of approximately 2°.
Claim 7
Dependent Claim
30 words
The improvement defined in claim 4 wherein said support means comprises a frustoconical light shield converging from the vicinity of said output end to the vicinity of said input end.
References Cited (Backward Citations)
US4199222A
Cited
GB2026194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |