Low bend loss quasi-single-mode optical fiber and optical fiber line
First Claim
Patent Images
1. An optical fiber comprising a first region comprising Δ
- 1MAX, a second region surrounding the first region and comprising Δ
2MAX and a width W2, and a third region surrounding the second region and comprising Δ
3MIN, wherein Δ
1MAX>
Δ
2MAX>
Δ
3MIN, wherein a mode field diameter at 1550 nm is greater than 9.0 μ
m, wherein W2 is at least 1 micron wide, and wherein the optical fiber comprises a length L2 and a measured fiber cutoff wavelength corresponding to the length L2, λ
C2-L2, greater than 1500 nm, and the optical fiber has a core cutoff wavelength, λ
C2-TH, less than 1300 nm.
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Abstract
Quasi-single mode optical waveguide fibers are disclosed that are bend resistant and capable of providing single mode transmission, for example at wavelengths greater than 1260 nm when the fundamental mode of optical energy is launched into the core of the fiber. Optical fiber line incorporating quasi-single mode optical waveguide fiber is also disclosed. Jumpers, or patchcords, utilizing quasi-single mode optical waveguide fiber are also disclosed herein.
81 Citations
29 Claims
-
1. An optical fiber comprising a first region comprising Δ
- 1MAX, a second region surrounding the first region and comprising Δ
2MAX and a width W2, and a third region surrounding the second region and comprising Δ
3MIN, wherein Δ
1MAX>
Δ
2MAX>
Δ
3MIN, wherein a mode field diameter at 1550 nm is greater than 9.0 μ
m, wherein W2 is at least 1 micron wide, and wherein the optical fiber comprises a length L2 and a measured fiber cutoff wavelength corresponding to the length L2, λ
C2-L2, greater than 1500 nm, and the optical fiber has a core cutoff wavelength, λ
C2-TH, less than 1300 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 27)
- 1MAX, a second region surrounding the first region and comprising Δ
-
8. An optical fiber comprising a first region comprising Δ
- 1MAX and a second region surrounding the first region and comprising Δ
2MAX, and a third region surrounding the second region and comprising Δ
3MIN, wherein the third region comprises a plurality of randomly distributed voids, and wherein Δ
1MAX>
Δ
2MAX>
Δ
3MIN, wherein the second region is at least 1 micron wide, wherein the optical fiber comprises a length L2 and a measured fiber cutoff wavelength corresponding to the length L2, λ
C2-L2, greater than 1300 nm, and the optical fiber has a core cutoff wavelength, λ
C2-TH, less than 1300 nm. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
- 1MAX and a second region surrounding the first region and comprising Δ
-
16. An optical transmission line comprised of:
-
a first optical fiber having a length L1 and a measured cutoff wavelength, λ
C1-L1, corresponding to the length L1, wherein λ
C1-L1 is measured with respect to a multimode reference under FOTP-80, and wherein λ
C1-L1 is less than 1260 nm;a second fiber having a length L2 comprising a first region comprising Δ
1MAX, a second region surrounding the first region and comprising Δ
2MAX, and a third region surrounding the second region and comprising Δ
3MIN, wherein Δ
1MAX>
Δ
2MAX>
Δ
3MIN, and wherein the second fiber exhibits a measured fiber cutoff wavelength corresponding to the length L2, λ
C2-L2, greater than 1300 nm. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
28. An optical fiber comprising a first region comprising Δ
- 1MAX, a second region surrounding the first region and comprising Δ
2MAX and a width W2, and a third region surrounding the second region and comprising Δ
3MIN, wherein Δ
1MAX>
Δ
2MAX>
Δ
3MIN, wherein said fiber exhibits a 22 meter cut-off wave length which is less than 1300, and a 2 meter cut-off which is more than 100 nm greater than the 22 meter cut-off wave length. - View Dependent Claims (29)
- 1MAX, a second region surrounding the first region and comprising Δ
Specification