Bend Resistant Multimode Optical Fiber
OwnerDana Craig Bookbinder, Ming-Jun Li +1inventors
InventorsDana Craig Bookbinder, Ming-Jun Li, Daniel Aloysius Nolan
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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.
Claims19
1-33. (canceled)
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 depressed-index annular region is offset from said core by at least 0.4 microns;
- wherein the core has a maximum relative refractive index Δ1MAX, in %, at 850 nm;
- wherein the core and the cladding provide (a) a bandwidth of greater than greater than 3.0 GHz-km at a wavelength of 850 nm.
The optical fiber of claim 1, further comprising a core radius greater than 20 microns and less than 28.
The optical fiber of claim 1, further comprising 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/Δ1MAX)2.
The optical fiber of claim 1, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 1.5 dB.
The optical fiber of claim 1, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 1.0 dB.
The optical fiber of claim 1, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 0.62 dB.
The optical fiber of claim 1, further comprising a profile volume with an absolute magnitude of greater than 50%-μm2.
The optical fiber of claim 1, wherein the core comprises germania doped silica.
The optical fiber or claim 6, wherein the depressed-index annular region of the cladding comprises fluorine.
The optical fiber or claim 1, wherein the depressed-index annular portion has profile volume with an absolute magnitude of less than 200%-μm2.
A multimode optical fiber comprising:
- a graded index glass core, the outer radius R1 of said core ending where the graded index region of the core ends, wherein 12.5≦R1≦40 microns;
- and
- a glass cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion surrounding and in contact with the core and an outer cladding region surrounding the depressed cladding region.
The optical fiber of claim 11, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 1.5 dB.
The optical fiber of claim 11, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 1.0 dB.
The optical fiber of claim 11, further comprising a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 850 nm of less than 0.62 dB.
The optical fiber of claim 11, further comprising a profile volume with an absolute magnitude of greater than 50%-μm2.
The optical fiber of claim 11, wherein the core comprises germania doped silica.
The optical fiber or claim 16, wherein the depressed-index annular region of the cladding comprises fluorine.
The optical fiber or claim 11, wherein the depressed-index annular portion has profile volume with an absolute magnitude of less than 200%-μm2.
Dependencies are inferred from the claim text.