US4737006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber termination including pure silica lens and method of making same
Assignee: STC PLC
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Filing: 1986-05-13
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Granted: 1988-04-12
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Expires: 2006-05-13
Abstract
Abstract A single mode fiber expanded beam termination is formed by fusion splicing an undoped (pure) silica rod to a single mode fiber. The length of the rod controls the expanded beam diameter, and forms a lens on the free end of the undoped silica rod to collimate an output beam.
Inventors
- 👤 Kevin J. Warbrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/255; G02B6/2551; G02B13/00; G02B13/0095; G02B3/00; G02B6/26; G02B6/32; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
64 words
A single mode fiber expanded termination comprising a pure silica rod one end of which is spliced to one end of a single mode fiber, the other end of the rod formed as a lens which is such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 2
Dependent Claim
64 words
A single mode fiber expanded termination comprising a pure silica rod one end of which is spliced to one end of a single mode fiber, the other end of the rod formed as a lens which is such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 3
Dependent Claim
23 words
A termination as claimed in claim 1 wherein the single mode fiber and the pure silica rod are of substantially the same diameter.
Claim 4
Independent Claim
76 words
A method of manufacturing a single mode fiber expanded beam termination comprising the steps of fusion splicing one end of a pure silica rod to one end of a single mode fiber and heat treating the other end of the pure silica rod to form a lens which is such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 5
Independent Claim
76 words
A method of manufacturing a single mode fiber expanded beam termination comprising the steps of fusion splicing one end of a pure silica rod to one end of a single mode fiber and heat treating the other end of the pure silica rod to form a lens which is such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 6
Dependent Claim
69 words
A method as claimed in claim 3 including the steps of disposing the other end of the pure silica rod adjacent to a mirror and coupling an optical signal to the other end of the single mode fiber, and wherein during the heat treating step the optical signal as reflected by the mirrors monitored by a detector, the heat treatment being terminated when the detector output is a maximum.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 4, wherein the other end of the pure silica rod is disposed in the range of electric arc apparatus employed to flame polish it to form the lens.
Claim 8
Independent Claim
137 words
A method of manufacturing a single mode fiber expanded beam termination comprising the steps of fusion splicing one end of a pure silica rod to one end of a single mode fiber, disposing the other end of the pure silica rod adjacent to a mirror, coupling an optical signal to the other end of the single mode fiber, employing a detector to monitor the optical signal as reflected by the mirror, and heat treating the other end of the pure silica rod, to form a lens thereat, whilst monitoring the reflected optical signal, the heat treatment being terminated when the detector output is a maximum, the lens thus formed being such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 9
Independent Claim
137 words
A method of manufacturing a single mode fiber expanded beam termination comprising the steps of fusion splicing one end of a pure silica rod to one end of a single mode fiber, disposing the other end of the pure silica rod adjacent to a mirror, coupling an optical signal to the other end of the single mode fiber, employing a detector to monitor the optical signal as reflected by the mirror, and heat treating the other end of the pure silica rod, to form a lens thereat, whilst monitoring the reflected optical signal, the heat treatment being terminated when the detector output is a maximum, the lens thus formed being such as to produce a collimated output beam from an optical beam transmitted along the fiber towards its one end and expanded within said pure silica rod.
Claim 10
Dependent Claim
48 words
A method as claimed in claim 6, wherein the heat treatment is provided by electric arc apparatus, the other end of the pure silica rod being disposed in the range of the electric arc apparatus which serves to flame polish the other rod end to form the lens.
Claim 11
Dependent Claim
81 words
An expanded beam connector comprising a pair of spaced apart single mode fiber expanded beam terminations, each termination comprising a respective pure silica rod one end of which is spliced to one end of a respective single mode fiber, the other end of each rod being formed as a lens which is such as to produce a collimated output beam from an optical beam transmitted along the respective fiber towards its one end and expanded within the respective pure silica rod.
Claim 12
Dependent Claim
81 words
An expanded beam connector comprising a pair of spaced apart single mode fiber expanded beam terminations, each termination comprising a respective pure silica rod one end of which is spliced to one end of a respective single mode fiber, the other end of each rod being formed as a lens which is such as to produce a collimated output beam from an optical beam transmitted along the respective fiber towards its one end and expanded within the respective pure silica rod.
Claim 13
Dependent Claim
37 words
An expanded beam connector as claimed in claim 8, wherein the two lenses are spaced apart by a distance such as to allow light transmitted through the connector to be accessed, between the lenses, for manipulation thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |