US5267340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber optic coupler and method of making same
Assignee: Viavi Solutions Inc
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Filing: 1992-04-13
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Granted: 1993-11-30
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Expires: 2012-04-13
Abstract
Abstract A low-cost, high performance 1×N fiber optic coupler where N>16 is presented. The coupler has a GRIN lens having an first optic fiber aligned with the optical axis of the lens at one end of the lens. The first optic fiber ends in a microlens. At the other end of the GRIN lens a bundle of tapered second optic fibers is centered on the optical axis of the lens.
Inventors
- 👤 Jing-Jong Pan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/32; G02B6/245; G02B6/255; G02B6/2552; G02B6/28; G02B6/2804; G02B6/2848
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A single mode optic fiber comprising a core along the length of said fiber; a cladding around said core along said fiber length; and an end section from an end of said fiber along a predetermined length of said fiber, said end section tapered at an angle θ toward said end so that at least said core is exposed, said angle θ in a range of 0.25 to 0.26°, where θ=tan.sup.-1 {(D.sub.o -D.sub.f)/2L} D o being the cladding diameter, D f being the smallest diameter of said fiber, and L the length of the end section.
Claim 2
Dependent Claim
96 words
A single mode optic fiber comprising a core along the length of said fiber; a cladding around said core along said fiber length; and an end section from an end of said fiber along a predetermined length of said fiber, said end section tapered at an angle θ toward said end so that at least said core is exposed, said angle θ in a range of 0.25 to 0.26°, where θ=tan.sup.-1 {(D.sub.o -D.sub.f)/2L} D o being the cladding diameter, D f being the smallest diameter of said fiber, and L the length of the end section.
Claim 3
Dependent Claim
22 words
The optic fiber as in claim 1 wherein said predetermined end section length is in the range of 12 to 14 mm.
Claim 4
Dependent Claim
19 words
The optic fiber as in claim 2 wherein said predetermined end section length is approximately equal to 12.7 mm.
Claim 5
Dependent Claim
95 words
A multimode optic fiber comprising a core along the length of said fiber; a cladding around said core along said fiber length; and an end section from an end of said fiber along a predetermined length of said fiber, said end section tapered at an angle θ toward said end so that at least said core is exposed, said angle θ in a range of 0.17 to 0.21°, where θ=tan.sup.-1 {(D.sub.o -D.sub.f)/2L} D o being the cladding diameter, D f being the smallest diameter of said fiber, and L the length of the end section.
Claim 6
Dependent Claim
95 words
A multimode optic fiber comprising a core along the length of said fiber; a cladding around said core along said fiber length; and an end section from an end of said fiber along a predetermined length of said fiber, said end section tapered at an angle θ toward said end so that at least said core is exposed, said angle θ in a range of 0.17 to 0.21°, where θ=tan.sup.-1 {(D.sub.o -D.sub.f)/2L} D o being the cladding diameter, D f being the smallest diameter of said fiber, and L the length of the end section.
Claim 7
Dependent Claim
22 words
The optic fiber as in claim 4 wherein said predetermined end section length is in the range of 12 to 14 mm.
Claim 8
Dependent Claim
19 words
The optic fiber as in claim 5 wherein said predetermined end section length is approximately equal to 12.7 mm.
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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |