Method and system for non-contact optical-power measurement
US-2016349144-A1 · Dec 1, 2016 · US
Optical fiber
US8977094B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8977094-B2 |
| Application number | US-201313859757-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2013 |
| Priority date | Apr 12, 2012 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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An optical fiber comprising a first core, a second core, a third core, and a cladding, wherein with a refractive index of the cladding as a reference, Δ1 is a maximum value of a relative refractive index difference of the first core, Δ2 is a maximum value of a relative refractive index difference of the second core, Δ3 is a minimum value of a relative refractive index difference of the third core, “a” is a half-value radial width for the relative refractive index difference (Δ1−Δ2) of the first core, “b” is a radius of a second core/third core boundary, and “c” is a radius of a third core/cladding boundary, the expressions 0.30%≦Δ1≦0.45%, −0.05%≦Δ2≦0.05%, −0.6%≦Δ3≦−0.3%, 2.85≦b/a, 10 μm≦b≦15 μm, and 3 μm≦c−b≦5.5 μm are satisfied, and transmission loss for a wavelength of 1550 nm when the optical fiber is wound around a mandrel with a diameter of 10 mm is no greater than 0.2 dB/turn.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical fiber comprising a first core at a center thereof, a second core that is adjacent to the first core and covers an outer circumference of the first core, a third core that is adjacent to the second core and covers an outer circumference of the second core, and a cladding that is adjacent to the third core and covers an outer circumference of the third core, wherein with a refractive index of the cladding as a reference, Δ1 is a maximum value of a r…
Assignees
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Classifications
- G02B6/0283Primary
Physics · mapped topic
- G02B6/02042Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G02B6/036Primary
Physics · mapped topic
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- What does patent US8977094B2 cover?
- An optical fiber comprising a first core, a second core, a third core, and a cladding, wherein with a refractive index of the cladding as a reference, Δ1 is a maximum value of a relative refractive index difference of the first core, Δ2 is a maximum value of a relative refractive index difference of the second core, Δ3 is a minimum value of a relative refractive index difference of the third co…
- Who is the assignee on this patent?
- Shinetsu Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification G02B6/0283. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).