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US4053764A
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Higher-order mode fiber optics t-coupler
Assignee: United States Department of the Air Force
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Filing: 1975-10-02
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Granted: 1977-10-11
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Expires: 1995-10-02
Abstract
Abstract A higher order mode, simplex, fiber optics T-coupler is based on using only the higher order lossy modes of single fiber optics whether the cable is single fiber or a fiber bundle. This allows for T-couplers that discriminate on modes.
Inventors
- 👤 Paul F. Sierak
- 👤 Allen E. Clough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:31
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/25; H04B10/2581; G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/42; G02B6/4201; G02B6/4219; G02B6/4236; G02B6/424; G02B6/4245; G02B6/4246
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A higher order mode fiber optic T-coupler being comprised of a single main optical fiber having first and second ends and a predetermined axis, said first end receiving a first input optical light signal for transmission toward said second end, said single main optical fiber having exclusively an air gap therein, said gap being defined by a first and second separated endfaces in said single main optical fiber, and a first multiplicity of exclusively single fiber optical channels positioned at said second endface of said gap, each of said single optical channels being at a different angle to said single main optical fiber, each of said angular optical channels consisting of a single optical fiber, the variation of distance of said gap and the adjustment of said angle determining the degree of coupling of said higher modes into said optical channels.
Claim 2
Dependent Claim
141 words
A higher order mode fiber optic T-coupler being comprised of a single main optical fiber having first and second ends and a predetermined axis, said first end receiving a first input optical light signal for transmission toward said second end, said single main optical fiber having exclusively an air gap therein, said gap being defined by a first and second separated endfaces in said single main optical fiber, and a first multiplicity of exclusively single fiber optical channels positioned at said second endface of said gap, each of said single optical channels being at a different angle to said single main optical fiber, each of said angular optical channels consisting of a single optical fiber, the variation of distance of said gap and the adjustment of said angle determining the degree of coupling of said higher modes into said optical channels.
Claim 3
Dependent Claim
95 words
A higher order mode fiber optic T-coupler as defined in claim 1 further including a second input optical light signal received at said second end of said single main optical fiber for transmission toward said first end, a second multiplicity of exclusively single optical channels positioned at said first endface defining said gap, each of said second multiplicity of single optical channels being at a different angle to said single main optical fiber, the degree of said angle determining the degree of coupling of said higher order modes into said second multiplicity of optical channels.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |