US5004316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupler fabrication techniques for dissimilar fibers
Assignee: Canada Minister of Communications
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Filing: 1986-01-09
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Granted: 1991-04-02
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Expires: 2006-01-09
Abstract
Abstract A fused twin biconical taper fiber optic splitter comprised of a pair of non-identical monomode or nominally monomode optical fibers having predetermined cladding diameters fused at respective narrowed waists, the cladding diameter of one fiber before coupler fabrication being greater than the other, whereby wavelength selective coupling between one and the other fiber is obtained.
Inventors
- 👤 Kenneth O. Hill
- 👤 Derwyn C. Johnson
- 👤 Robert G. Lamont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:07
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/293; G02B6/29331; G02B6/29332; G02B6/2804; G02B6/2821; G02B6/2826; G02B6/283; G02B6/2835
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A fused twin biconical taper fiber optic splitter comprised of a pair of monomodal or quasi monomodal optical fibers hard fused at respective narrowed waists, the index of refraction of the cladding of one fiber being different from the index of refraction of the cladding of the other, whereby coupling from one fiber to the other can be obtained at a predetermined wavelength or band of wavelengths depending on the refractive indexes and biconical tapers of the splitter.
Claim 2
Dependent Claim
78 words
A fused twin biconical taper fiber optic splitter comprised of a pair of monomodal or quasi monomodal optical fibers hard fused at respective narrowed waists, the index of refraction of the cladding of one fiber being different from the index of refraction of the cladding of the other, whereby coupling from one fiber to the other can be obtained at a predetermined wavelength or band of wavelengths depending on the refractive indexes and biconical tapers of the splitter.
Claim 3
Dependent Claim
33 words
A splitter as defined in claim 1 in which the index of refraction of the cladding of the larger diameter fiber is greater than the index of refraction of the smaller diameter fiber.
Claim 4
Dependent Claim
18 words
A splitter as defined in claim 1 in which the cladding diameters of the two fibers are different.
References Cited (Backward Citations)
US4457581A
Cited
US4632513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |