Bend Resistant Multimode Optical Fiber
First Claim
Patent Images
1. A multimode optical fiber comprising:
- a graded index glass core; and
an inner cladding surrounding and in contact with the core, and a second cladding comprising a depressed-index annular portion surrounding the inner cladding, said depressed-index annular portion having a refractive index delta less than about −
0.2% and a width of at least 1 micron, wherein the width of said inner cladding is at least 0.5 microns and less than 4 microns.
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 which is spaced from the core at least 0.5 microns and less than 4 microns.
-
Citations
32 Claims
-
1. A multimode optical fiber comprising:
-
a graded index glass core; and an inner cladding surrounding and in contact with the core, and a second cladding comprising a depressed-index annular portion surrounding the inner cladding, said depressed-index annular portion having a refractive index delta less than about −
0.2% and a width of at least 1 micron, wherein the width of said inner cladding is at least 0.5 microns and less than 4 microns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 23)
-
-
19. A multimode optical fiber comprising:
-
a graded index glass core; and an inner cladding surrounding and in contact with the core, and a second cladding comprising a depressed-index annular portion surrounding the inner cladding, said depressed-index annular portion having a refractive index delta less than about −
0.2% and a width of at least 1 micron, wherein the width of said inner cladding is at least 0.5 microns and said fiber further exhibits a 1 turn 10 mm diameter mandrel wrap attenuation increase, of less than or equal to 0.4 dB/turn at 850 nm, and an overfilled bandwidth greater than 1.5 GHz-km at 850 nm. - View Dependent Claims (20, 21, 22)
-
-
24. A multimode fiber comprising a graded index core, and a cladding surrounding said core, said cladding comprising an inner annular region and a depressed annular region surrounding the inner annular region, wherein the core has an outer radius R1 between 23 and 26 microns and said inner annular region comprises a width of greater than 0.5 microns and less than 3 microns, said inner annular region comprising a peak fluorine concentration greater than 0.2 wt percent and a peak germania concentration greater than 0.2 wt percent, said depressed annular region comprising a depressed-index having a refractive index delta less than about −
- 0.2% and a width of at least 1 micron.
- View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
Specification