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US 7,583,878 B2Granted
Optical fiber, optical fiber ribbon, and optical interconnection system
AssigneeFurukawa Electric Co., Ltd.
InventorsRyuichi Sugizaki, Iwao Shimotakahara, Harumi Inaba, Takeshi Yagi
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Abstract
An optical fiber is made of silica-based glass, and includes a core and a cladding. The optical fiber has a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, transmits light with a wavelength of 1250 nanometers in a single mode, and has a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter.
Claims18
An optical fiber, made of silica-based glass, comprising:
- a core;
- and
- a cladding,
- wherein the optical fiber includes a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, the optical fiber is configured to transmit light with a wavelength of 1250 nanometers in a single mode, and the optical fiber includes a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, and
- wherein the optical fiber includes a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, and a relative refractive index difference of a second core of −0.05% or smaller with respect to the cladding, the second core surrounding the first core.
2 more elements
An optical fiber, made of silica-based glass, comprising:
- a core;
- and
- a cladding,
- wherein the optical fiber includes a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, the optical fiber is configured to transmit light with a wavelength of 1250 nanometers in a single mode, and the optical fiber includes a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, and
- wherein the optical fiber includes a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of −0.05% or smaller with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third core of 0.4% or smaller with respect to the cladding, the third core surrounding the second core.
2 more elements
An optical fiber, made of silica-based glass, comprising:
- a core;
- and
- a cladding,
- wherein the optical fiber includes a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, the optical fiber is configured to transmit light with a wavelength of 1250 nanometers in a single mode, and the optical fiber includes a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, and
- wherein the optical fiber includes a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of 0% with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third core of −0.05% or larger with respect to the cladding, the third core surrounding the second core.
2 more elements
An optical fiber ribbon comprising:
- a plurality of optical fibers arranged in parallel and combined in a flat-band shape, each optical fiber being made of silica-based glass, and including a core and a cladding, each optical fiber including a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, including a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, and a relative refractive index difference of a second core of −0.05% or smaller with respect to the cladding, the second core surrounding the first core.
An optical interconnection system in a communication waveband of 1.3 micrometers, comprising:
- an optical fiber, made of silica-based glass, including a core and a cladding, the optical fiber including a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, including a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, including a relative refractive index difference of a second cord of −0.05% or smaller with respect to the cladding, the second core surrounding the first core, and being configured to transmit an optical signal;
- and
- a vertical-cavity surface-emitting laser emitting an optical signal in a waveband of 1.3 micrometers to the optical fiber.
An optical fiber ribbon comprising:
- a plurality of optical fibers arranged in parallel and combined in a flat-band shape, each optical fiber being made of silica-based glass, and including a core and a cladding, each optical fiber including a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, and including a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of −0.05% or smaller with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third core of 0.4% or smaller with respect to the cladding, the third core surrounding the second core.
An optical fiber ribbon comprising:
- a plurality of optical fibers arranged in parallel and combined in a flat-band shape, each optical fiber being made of silica-based glass, and including a core and a cladding, each optical fiber including a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, and including a relative refractive index difference of a first core of 0.8% or larger, with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of 0% with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third of −0.05% or larger with respect to the cladding, the third core surrounding the second core.
An optical interconnection system in a communication waveband of 1.3 micrometers, comprising:
- an optical fiber, made of silica-based glass, including a core and a cladding, the optical fiber including a mode field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, including a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of −0.05% or smaller with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third core of 0.4% or smaller with respect to the cladding, the third core surrounding the second core, and being configured to transmit an optical;
- and
- a vertical-cavity surface-emitting laser emitting an optical signal in a waveband of 1.3 micrometers to the optical fiber.
An optical interconnection system in a communication waveband of 1.3 micrometers, comprising:
- an optical fiber, made of silica-based glass, including a core and a cladding, the optical fiber including a mode of field diameter of 5.4 micrometers or larger at a wavelength of 1300 nanometers, being configured to transmit light with a wavelength of 1250 nanometers in a single mode, including a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter, including a relative refractive index difference of a first core of 0.8% or larger with respect to the cladding, the first core being located at a center of the optical fiber, a parameter α of 1.5 or larger, a relative refractive index difference of a second core of 0% with respect to the cladding, the second core surrounding the first core, and a relative refractive index difference of a third core of −0.05% or larger with respect to the cladding, the third core surrounding the second core, and being configured to transmit an optical signal;
- and
- a vertical-cavity surface-emitting laser emitting an optical signal in a waveband of 1.3 micrometers to the optical fiber.
Dependencies are inferred from the claim text.