Patent application number | Description | Published |
20080226241 | OPTICAL FIBER AND OPTICAL FIBER RIBBON, AND OPTICAL INTERCONNECTION SYSTEM - An optical fiber, made of silica-based glass, comprising a core and a cladding. The optical fiber having a mode field diameter of 6.5 μm or larger at a wavelength of 1300 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nm when the optical fiber is bent with a curvature radius of 1.5 mm. | 09-18-2008 |
20080232750 | OPTICAL FIBER RIBBON - An optical fiber ribbon includes a plurality of optical fibers, each includes a glass optical fiber coated with a fiber coating, that are arranged in parallel, and a ribbon coating that coats the optical fibers arranged in parallel. The optical fiber ribbon has a thickness equal to 300 μm or less. The fiber coating is made of a non-flame-resistant ultraviolet curable resin. The ribbon coating has a thickness equal to 40 μm or more and is made of a flame resistant resin. | 09-25-2008 |
20080310805 | OPTICAL FIBER, OPTICAL FIBER RIBBON, AND OPTICAL INTERCONNECTION SYSTEM - 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 nanometers when the optical fiber is bent with a curvature radius of 1 millimeter. | 12-18-2008 |
20080317418 | NONLINEAR OPTICAL FIBER, NONLINEAR OPTICAL DEVICE, AND OPTICAL SIGNAL PROCESSING APPARATUS - A core includes a center core region, a core layer that is formed around the center core region and that has a refractive index lower than that of the center core layer, and at least one buffer core layer that is formed between the center core region and the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. A cladding is formed around the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. An effective core area at a wavelength of 1550 nm is equal to or smaller than 18 μm | 12-25-2008 |
20090052848 | OPTICAL FIBER, OPTICAL FIBER RIBBON, AND OPTICAL INTERCONNECTION SYSTEM - An optical fiber has a refractive index profile approximated by n(r)=n1[1−2(Δ1/100)(r/a)̂α] | 02-26-2009 |
20090052853 | Holey fiber and method of manufacturing the same - A holey fiber includes a core region and a cladding region surrounding the core region and having air holes arranged around the core region. The cladding region includes an inner cladding layer surrounding the core region and an outer cladding layer surrounding the inner cladding layer. Furthermore, viscosities of the core region and the inner cladding layer are set lower than a viscosity of the outer cladding layer. | 02-26-2009 |
20090052854 | OPTICAL FIBER AND WAVEGUIDE - An optical fiber in which the macro-bending loss is lowered while an MFD is maintained large, and a waveguide including the optical fiber. The optical fiber includes a core region doped with an impurity; a first cladding region formed as a layer around the core region and including holes as microstructures; and a second cladding region formed as a layer around the first cladding region and made of a homogeneous material. A relative refractive-index difference Δ1 between the core region and the second cladding region is equal to or higher than 0.01% and lower than 0.3%. A total cross-sectional area of the holes in the first cladding region with respect to a total cross-sectional area of the core region, the first cladding region, and the second cladding region is equal to or smaller than 20%. A waveguide is formed using the optical fiber. | 02-26-2009 |
20090052855 | OPTICAL FIBER AND WAVEGUIDE - A core region is doped with an impurity. A first cladding region is formed in a layered structure around the core region, including a microstructure. A second cladding region is formed in a layered structure around the first cladding region, including a homogeneous material. A relative refractive-index difference Δ1 between the core region and the second cladding region is equal to or more than 0.4% and equal to or less than 1.0%. | 02-26-2009 |
20090060432 | LIGHT TRANSMITTING BODY AND OPTICAL INTERCONNECTION SYSTEM - An optical transmission medium includes a GI optical fiber that is made of silica glass. The GI optical fiber includes a core having a graded-index refractive index profile and a cladding formed around the core. The GI optical fiber is bent by equal to or more than a quarter turn with a curvature radius equal to or larger than 4 mm and equal to or smaller than 10 mm. | 03-05-2009 |
20090086770 | OPTICAL FIBER AND OPTICAL FIBER RIBBON, AND OPTICAL INTERCONNECTION SYSTEM - An optical fiber, made of silica-based glass, comprising a core and a cladding, each of the optical fiber having a mode field diameter of 5.5 μm or larger at a wavelength of 1100 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB/turn or smaller at a wavelength of 1100 nm when the optical fiber is bent with a curvature radius of 2 mm. | 04-02-2009 |
20090257724 | NONLINEAR OPTICAL FIBER, NONLINEAR OPTICAL DEVICE, AND OPTICAL SIGNAL PROCESSING APPARATUS - A core includes a center core region, a core layer that is formed around the center core region and that has a refractive index lower than that of the center core layer, and at least one buffer core layer that is formed between the center core region and the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. A cladding is formed around the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. An effective core area at a wavelength of 1550 nm is equal to or smaller than 18 μm | 10-15-2009 |
20100296786 | OPTICAL FIBERS - An optical fiber suitable for high-capacity transmission having a large effective core area, a low bending loss, and capable of single mode operation at 1550 nm is provided. The optical fiber | 11-25-2010 |
20100326139 | OPTICAL FIBER PREFORM MANUFACTURING METHOD - An optical fiber preform manufacturing method includes: supporting a drilling jig in a radial direction of a preform that is cylinder-shaped; moving the drilling jig in a longitudinal direction of the preform; and forming a plurality of slits each extending in the longitudinal direction and each directed from an outer side of the preform toward a center the preform, and a plurality of holes each extending in the longitudinal direction and each connecting with an end of one of the plurality of slits in a depth direction of the one of the plurality of slits. | 12-30-2010 |
20120195560 | OPTICAL FIBER MODULE - An optical fiber module includes a polarization-maintaining highly-nonlinear optical fiber and a housing. The polarization-maintaining highly-nonlinear optical fiber includes a core, a cladding surrounding the core and having two stress applying portions formed to sandwich the core and extend along the core, and a coating covering the cladding. The housing houses the polarization-maintaining highly-nonlinear optical fiber which is wound in a ring coil shape. The polarization-maintaining highly-nonlinear optical fiber has a bending loss of 0.01 dB/turn or less at a wavelength of 1550 nm when bent to form a diameter of 20 mm, a nonlinear coefficient γ of 10 W | 08-02-2012 |
20130136409 | HOLE-ASSISTED OPTICAL FIBER - A hole-assisted optical fiber includes a core portion and a cladding portion that includes an inner cladding layer, an outer cladding layer, and holes formed around the core portion. A diameter of the core portion is 3 μm to 9.8 μm, a relative refractive index difference of the core portion relative to the outer cladding layer is 0.11% to 0.45%, an outside diameter of the inner cladding layer is 53 μm or less, a relative refractive index difference of the inner cladding layer relative to the outer cladding layer is a negative value, −0.30% or more, a diameter of each hole is 2.4 μm to 4.0 μm, a hole occupancy rate is 17% to 48%, a bending loss at a wavelength of 1625 nm when bent at a radius of 5 mm is 1 dB/turn or less, and a cut-off wavelength is 1550 nm or less. | 05-30-2013 |
20140240819 | MULTI-CORE AMPLIFICATION OPTICAL FIBER AND MULTI-CORE OPTICAL FIBER AMPLIFIER - A multi-core amplification optical fiber includes a plurality of rare-earth-doped core portions and a cladding portion positioned at an outer periphery of the core portions and having refractive index lower than those of the core portions. When a doping concentration of the rare-earth of each of the core portions is 250 ppm to 2000 ppm, a relative refractive index difference of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 μm to 5 μm, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 μm and at equal to or smaller than 60 μm so that a light-crosstalk between the adjacent core portions is equal to or lower than −30 dB. | 08-28-2014 |