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| Number | Title | Issue Date |
| 8184936 | Multi-mode bending-resistant fiber and production method thereof A multimode fiber including a core and a cladding. The core has a radius (R1) of 24-26 μm, the refractive index profile thereof is a parabola, and the maximum relative refractive index difference (Δ1) is 0.9-1.1%. The cladding surrounds the core and include... | 05/22/2012 |
| 8107782 | Microstructuring optical wave guide devices with femtosecond optical pulses The present invention is directed to the creation of optical waveguiding devices from standard optical fibers by the creation of zones of permanently altered refractive index characteristics therein. A high intensity femtosecond laser beam is focused at a predetermi... | 01/31/2012 |
| 8090233 | Microstructuring optical wave guide devices with femtosecond optical pulses The present invention is directed to the creation of optical waveguiding devices from standard optical fibers by the creation of zones of permanently altered refractive index characteristics therein. A high intensity femtosecond laser beam is focused at a predetermi... | 01/03/2012 |
| 8081854 | Low bend loss optical fiber Disclosed is a low bend loss optical fiber including: a core; an inner layer disposed at outside of the core, which has a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing as it becomes farther f... | 12/20/2011 |
| 8041172 | Transmission optical fiber having large effective area The present invention relates to a transmission optical fiber. The optical fiber includes, from its center to its periphery a central core, an intermediate cladding, and a depressed cladding. The optical fiber has an effective area (Seff) of at least abou... | 10/18/2011 |
| 8014645 | Dispersion shifted optical fiber A 1.55 μm band dispersion shifted optical fiber is provided which has a low loss and low dispersion slope. A core region “a” is heavily doped with GeO2 . A core region “b” is composed of pure SiO2 glass. A cladding section is arranged ... | 09/06/2011 |
| 8009950 | Multimode fiber A multimode optical fiber comprises a central core having an alpha profile, a depressed cladding having a portion in continuity with the alpha profile of the central core and a stepped portion, and an outer cladding. The alpha profile is obtained by co-doping at lea... | 08/30/2011 |
| 7995889 | Single mode optical fiber An optical transmission fiber comprises a central core having an index difference Δn1 with an outer optical cladding; a first inner cladding having an index difference Δn2 with the outer cladding; and a second buried inner cladding having an ... | 08/09/2011 |
| 7929818 | Large effective area fiber with graded index GE-free core According to some embodiments an optical waveguide fiber comprises (i) a Ge free core having an effective area of 100 μm2to 150 μm2, at 1550 nm wavelength, said core comprising: a) a central core region extending radially outwardly from a cen... | 04/19/2011 |
| 7925132 | 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 region, and at least one buffer core layer that is formed between the center core region and the core l... | 04/12/2011 |
| 7903917 | Low bend loss single mode optical fiber Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R1 and cladding, the cladding having an annular inner region of radius R2, an annular ring region, ... | 03/08/2011 |
| 7903918 | Large numerical aperture bend resistant multimode optical fiber Bend resistant optical fibers which are multi-moded at 1300 nm include a core, an inner cladding, a low index ring and an outer cladding. The core has a graded index of refraction with a core alpha profile where 1.9≦αC≦2.1, a maximum relative refract... | 03/08/2011 |
| 7856162 | Large mode area fiber amplifiers with reduced stimulated brillouin scattering A large mode area fiber amplifier suitable for high power applications includes a core region specifically configured to allow for high power operation while also limiting the amount of SBS that is generated. The composition of the core region is selected to include... | 12/21/2010 |
| 7787731 | Bend resistant multimode optical fiber 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 portio... | 08/31/2010 |
| 7773845 | Optical fiber and optical-fiber transmission line An optical fiber transmits at least a signal light having a wavelength of 1550 nanometers in a fundamental propagation mode. The optical fiber has a cutoff wavelength equal to or longer than a wavelength of 1550 nanometers, a wavelength dispersion in the fundamental... | 08/10/2010 |
| 7760977 | Fiber-optic cable Step-index optical waveguides are made of multicomponent glass containing a core glass and an outer glass which entirely surrounds the core class. A fiber-optic cable for conducting electromagnetic radiation, contains at least one bundle of individual fibers which e... | 07/20/2010 |
| 7734136 | Single mode optical fibre as well as optical communication system The present invention relates to a single mode optical fiber comprising a first central region having a radius r1, a maximum refractive index value n1 and at least one second ring surrounding said first central region, which second ring has a radius r | 06/08/2010 |
| 7711227 | Optical fiber An optical fiber is described in which the cladding is provided with a refractive index that increases in a radially outward direction. In particular embodiments the refractive index of the cladding increases monotonically from a low value to a value close to or hig... | 05/04/2010 |
| 7646955 | Multimode optical fiber with low differential mode delay An optical multimode fiber including a graded index core and an extended gradient core which has a negative refractive index difference with respect to the cladding. The fiber improves the bandwidth, reliability and complexity of the telecommunication systems that a... | 01/12/2010 |
| 7627219 | Large mode area fiber amplifiers with reduced stimulated brillouin scattering A large mode area fiber amplifier suitable for high power applications includes a core region specifically configured to allow for high power operation while also limiting the amount of SBS that is generated. The composition of the core region is selected to include... | 12/01/2009 |
| 7623747 | Single mode optical fiber An optical transmission fiber includes a central core having an index difference Δn1 with an outer optical cladding; a first inner cladding having an index difference Δn2 with the outer cladding; and a second buried inner cladding having an i... | 11/24/2009 |
| 7620282 | Low bend loss single mode optical fiber Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R1 and cladding, the cladding having an annular inner region of radius R2, an annular ring region, ... | 11/17/2009 |
| 7616856 | Varying refractive index optical medium using at least two materials with thicknesses less than a wavelength An optical medium has a graded effective refractive index with a high maximum refractive index change. The medium is formed using alternating layers of two or more materials having significantly different refractive indices. The thickness of the layers of at least o... | 11/10/2009 |
| 7613374 | Optical fiber and optical-fiber transmission line An optical fiber that transmits a signal light in a fundamental propagation mode has a cutoff wavelength longer than a wavelength of the signal light, a wavelength dispersion of the fundamental propagation mode of −5 ps/nm/km to −1 ps/nm/km at a wavelength of 15... | 11/03/2009 |
| 7539381 | Low bend loss coated optical fiber An optical fiber includes a core and a cladding, said cladding having a refractive index nc a first coating directly contacting the cladding of said fiber, said coating having a thickness of less than 10 microns, said coating having a refractive index del... | 05/26/2009 |
| 7492999 | Optical fiber and optical-fiber transmission line An optical fiber transmits at least a signal light having a wavelength of 1550 nanometers in a fundamental propagation mode. The optical fiber has, a cutoff wavelength equal to or longer than 1550 nanometers, a wavelength dispersion of 4 ps/nm/km to 7 ps/nm/km in th... | 02/17/2009 |
| 7483614 | Optical fiber and optical device using the same There is disclosed an optical fiber wherein an absolute value of the fourth order dispersion β4 of fourth derivative β4 of propagation constant β with respect to angular frequency ω at a mean zero dispersion wavelength λ0 in an ... | 01/27/2009 |
| 7440663 | Single-mode optical fiber A single-mode optical fiber has a cut-off wavelength of 1260 nm or less, a zero-dispersion wavelength in the range of 1300 nm to 1324 nm, a zero-dispersion slope of 0.093 ps/nm2/km or less, a mode field diameter at a wavelength of 1310 nm in the range of ... | 10/21/2008 |
| 7440665 | Optical fiber An optical fiber not only can suppress SBS but also can be produced easily. The optical fiber 1 comprises an optical core region 10 including the center axis and an optical cladding region 14 surrounding the optical core region 10. The op... | 10/21/2008 |
| 7437044 | Pure silica core, high birefringence, single polarization optical waveguide Methods and apparatus provide for birefringent waveguides suitable for optical systems exhibiting polarization dependence such as interferometer sensors including Sagnac interferometric fiber optic gyroscopes (IFOG). The waveguides, for some embodiments, may offer s... | 10/14/2008 |
| 7437043 | Large diameter optical waveguide, grating and laser A large diameter optical waveguide, grating, and laser includes a waveguide 10 having at least one core 12 surrounded by a cladding 14, the core propagating light in substantially a few transverse spatial modes; and having an outer waveguide dim... | 10/14/2008 |
| 7437040 | Optical fiber with reduced stimulation Brillouin scattering An optical fiber having a given refractive index profile comprises a core region and a cladding region. The core region includes at least two co-dopants and the concentration of at least one of said core dopant varies continuously over the entire core region. The op... | 10/14/2008 |
| 7429138 | Optical connection method and optical transmission apparatus A plastic optical fiber (11) has a core (12) and a clad (13). The clad (13) is composed of an outer clad (14) and an inner clad (15). The refractive index in the core (12) gradually increases as the distance from the ... | 09/30/2008 |
| 7428360 | Optical waveguide sensor and method of manufacture An optical waveguide environmental sensor is provided that is capable of detecting a target gas or liquid in the ambient environment in an advantageously short period of time. The waveguide is preferably in the form of an optical fiber having a cladding that contain... | 09/23/2008 |
| 7426328 | Varying refractive index optical medium using at least two materials with thicknesses less than a wavelength An optical medium has a graded effective refractive index with a high maximum refractive index change. The medium is formed using alternating layers of two or more materials having significantly different refractive indices. The thickness of the layers of at least o... | 09/16/2008 |
| 7425099 | Systems and methods for modifying selected portion of optical fiber microstructure An air-clad optical fiber is provided having a core that is surrounded by an inner cladding region, an air-clad region, and an outer region. A lead end of the air-clad optical fiber is prepared for splicing by removing the air-clad region and all fiber regions outsi... | 09/16/2008 |
| 7424195 | Multimode optical fibre Optical fiber having a multimode core (10) comprising:—a first zone (11), which is homogeneous, made of a first material, which has a first refractive index;—a second zone (12) made of at least one second material, which has a second refract... | 09/09/2008 |
| 7421174 | Multi-wavelength, multimode optical fibers A silicate optical fiber comprises a graded index silicate core co-doped with aluminum oxide, phosphorus oxide, germanium oxide and fluorine in unique compositions that we have discovered allow multimode, multi-wavelength operation without significant intermodal dis... | 09/02/2008 |
| 7415183 | Silica based glass waveguide and optical module using the same A silica based glass waveguide having almost the same optical characteristics as designed value and an optical module using a silica based glass waveguide having excellent optical characteristics and reduced connecting loss are provided. A silica based glass wavegui... | 08/19/2008 |
| 7412142 | Optical fiber with plurality of air holes and stress rods An optical fiber comprising: (i) a silica based passive core having a first index of refraction n1; (ii) a silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2, said claddi... | 08/12/2008 |
