Bend resistant multimode optical fiber
First Claim
Patent Images
1. A multimode optical fiber comprising:
- a graded index glass core; and
a cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion surrounding the core, wherein the depressed-index annular portion comprises glass comprising a plurality of holes.
1 Assignment
0 Petitions
Accused Products
Abstract
Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index.
-
Citations
23 Claims
-
1. A multimode optical fiber comprising:
-
a graded index glass core; and a cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion surrounding the core, wherein the depressed-index annular portion comprises glass comprising a plurality of holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A multimode optical fiber comprising:
-
a graded index glass core; and a glass cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion; wherein the core has a maximum relative refractive index Δ
1MAX, in %, at 850 nm;wherein the core and the cladding provide (a) a bandwidth of greater than 750 MHz-km at a wavelength of 850 nm, and (b) a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 1550 nm, in dB, of less than or equal to the product of two times (1/Δ
1MAX)2. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A multimode optical fiber comprising:
-
a graded index glass core extending from a centerline to a radius R1, wherein R1>
20 microns; anda cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion and an outer annular portion, wherein the depressed-index annular portion surrounds the core, and the outer annular portion surrounds and is in contact with the depressed-index annular portion; wherein the core has a maximum relative refractive index at 850 nm, Δ
1MAX, less than or equal to 0.80%;wherein the depressed-index annular portion surrounds and is in contact with the core and has a minimum relative refractive index, Δ
2MIN; andwherein Δ
1MAX>
0>
Δ
2MIN. - View Dependent Claims (21, 22)
-
-
23. A multimode optical fiber comprising:
-
a graded index glass core extending from a centerline to a radius R1; and a cladding surrounding and in contact with the core, the cladding comprising an inner annular portion, and a depressed-index annular portion; wherein;
the inner annular portion surrounds the core;
the depressed-index annular portion surrounds the inner annular portion;
the core has a maximum relative refractive index Δ
1MAX at 850 nm;
the inner annular portion has a maximum relative refractive index Δ
2MAX at 850 nm;
the depressed-index annular portion has a minimum relative refractive index Δ
3MIN at 850 nm;
Δ
1MAX>
Δ
2MAX>
Δ
3MIN; and
the inner annular portion has a width W2>
0.4 microns.
-
Specification