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| Number | Title | Issue Date |
| 8135255 | Optical fiber Provided is an optical fiber including: a core at a center thereof; a first cladding adjacent to the core to cover a circumference of the core; and a second cladding adjacent to the first cladding to cover a circumference of the first cladding, where 0.35%≦(Δ | 03/13/2012 |
| 8121453 | Optical fiber Provided is an optical fiber including: a first core at a center thereof; a second core adjacent to the first core to cover a circumference of the first core; a third core adjacent to the second core to cover a circumference of the second core; and a cladding adjace... | 02/21/2012 |
| 8111962 | Optical fiber connection structure and single-mode fiber An optical fiber connection structure which reduces MPI in the use of an optical fiber with a bend resistance improved by forming holes in the fiber, and a single-mode fiber which reduces MPI are provided. A second cladding portion of a second single-mode fiber 2... | 02/07/2012 |
| 8094986 | Double clad fiber and fiber end processing method, and fiber-combiner connecting structure including the same A double clad fiber includes a core, a first cladding provided so as to cover the core, and a second cladding provided so as to cover the first cladding. The second cladding has a plurality of pores extending in a length direction and arranged so as to surround the ... | 01/10/2012 |
| 8081856 | Optical fiber and optical cable Provided is an optical fiber that has a small bending loss, can be securely prevented from being fractured due to accidental bending during installation or other operations, and is compliant with the G. 652 standard. An optical fiber 1 includes a core 11 | 12/20/2011 |
| 8081855 | Optical fiber and optical cable Provided is an optical fiber that has a small bending loss, can be securely prevented from being fractured due to accidental bending during installation or other operations, and is compliant with the G. 652 standard. An optical fiber 1 includes a core 11 | 12/20/2011 |
| 8041173 | Multi-core optical fiber having alignment markers A multi-core optical fiber includes: a plurality of core portions; and a cladding portion positioned around the plurality of core portions and including a marker for identifying a position of a specific one of the plurality of core portions. ... | 10/18/2011 |
| 7965916 | Laser light source device, image display and illuminator There is a problem that in the connection portion between a rare-earth-doped double clad fiber and a single mode fiber, pumping light leaks in a portion having the coating, and the fiber generates heat partially with this energy and deteriorates. Also, there is anot... | 06/21/2011 |
| 7925133 | Imaging system and related techniques A method and apparatus for imaging using a double-clad fiber is described. ... | 04/12/2011 |
| 7920768 | Single mode optical fiber 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 r2 and a minimum... | 04/05/2011 |
| 7853108 | Fabrication-tolerant waveguides and resonators An optical waveguide having a core region with a substantially rectangular cross-section with a selected aspect ratio of width to height. Embodiments include devices incorporating the optical waveguide and methods for using the optical waveguide. ... | 12/14/2010 |
| 7844155 | Optical fiber containing alkali metal oxide Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, Li2O, Rb2O, Cs... | 11/30/2010 |
| 7835608 | Method and apparatus for optical delivery fiber having cladding with absorbing regions Apparatus and method for distributed absorption of pump light over a length of delivery fiber that is, for example in some embodiments, fusion spliced to an end of a multiply clad gain fiber that has significant unused pump light at the end of the gain fiber. In som... | 11/16/2010 |
| 7813610 | Plastic optical medium and production method thereof A first polymerizable composition is poured into a pipe (30), then is polymerized to be a first layer (13). Next, a second polymerizable composition is poured into the pipe (30) and polymerized to be a second layer (14). These pouring and... | 10/12/2010 |
| 7809227 | Optical fiber, and optical access network, local area network and optical parts for communication, which use the optical fiber An optical fiber, and an optical access network, a local area network and optical parts for communication, which uses the optical fiber, are disclosed. The optical fiber whose core diameter is 10 μm˜40 μm has at least two propagation modes in a wavelength over 12... | 10/05/2010 |
| 7787732 | 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 ben... | 08/31/2010 |
| 7734137 | Multiple core microstructured optical fibre A multicore optical fibre includes a microstructured cladding material formed from a plurality of cladding elements arranged in an array and each cladding element comprising at least two different materials each having different refractive indices, and a plurality o... | 06/08/2010 |
| 7643717 | Hybrid organic-inorganic materials for waveguides, optical devices, and other applications Waveguides are disclosed (and other devices and materials including but not limited to hybrid organic-inorganic coatings, passivation materials, glob top materials, underfill materials, materials for IC and other applications, microlenses and any of a wide variety o... | 01/05/2010 |
| 7587110 | Multicore optical fiber with integral diffractive elements machined by ultrafast laser direct writing A multicore optical fiber with an integral diffractive element. The multicore optical fiber includes: a first optical fiber core formed of a non-photosensitive material having an initial index of refraction; and a second optical fiber core including a second longitu... | 09/08/2009 |
| 7583878 | 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, an... | 09/01/2009 |
| 7574088 | 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 los... | 08/11/2009 |
| 7570856 | Apparatus and method for an erbium-doped fiber for high peak-power applications A method and apparatus using a gain medium in the form of a multiply clad gain fiber having an erbium-doped core. In some embodiments, aluminum and germanium are added to the silica core to make λ0 longer than the signal wavelength so the signal incurs n... | 08/04/2009 |
| 7558456 | Optical waveguide device An optical waveguide device includes a lower cladding layer, a high refractive index region provided on the lower cladding layer, a pair of cores provided on the lower cladding layer on both sides of the high refractive index region, and an upper cladding layer prov... | 07/07/2009 |
| 7526167 | Apparatus and method for a high-gain double-clad amplifier An optical apparatus design and method for suppressing cladding-mode gain in fiber- and other waveguide-amplification devices. In some embodiments, a signal-wavelength-absorbing core or region is included within the pump cladding or the pump waveguide, in order to a... | 04/28/2009 |
| 7519257 | Waveguide structure for guiding light in low-index material A high-index-contrast waveguide structure material used to guide light through a low-refractive-index material. In one embodiment, the waveguide structures are capable of guiding and confining light in such a way that very high optical intensity is obtained in a sma... | 04/14/2009 |
| 7509010 | End-surface closely arranged multicore optical fiber and manufacturing method thereof In an end surface closely arranged multicore optical fiber 200, at least two single-mode optical fibers 10 are, at one and the other ends of the individual single-mode optical fibers 10, closely arranged in parallel to each other and bound toget... | 03/24/2009 |
| 7450807 | Low bend loss optical fiber with deep depressed ring Optical waveguide fiber that is bend resistant and single moded at 1260 nm and at higher wavelengths. The optical fiber includes a core and cladding, the cladding having an annular inner region, an annular ring region, and an annular outer region. The annular ring r... | 11/11/2008 |
| 7440662 | Compensating fiber for cumulated chromatic dispersion and chromatic dispersion slope A multimode fiber having an index profile such that, for a propagation mode other than the fundamental mode and at a wavelength of 1550 nm, the fiber presents a positive chromatic dispersion greater than or equal to 50 ps/run/km, a positive chromatic dispersion slop... | 10/21/2008 |
| 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 |
| 7440165 | Optical fiber Provided is an optical fiber. The optical fiber includes a core and a cladding, the core containing a first element for inducing non-linear Raman phenomenon, and the cladding containing a second element which is a rare earth element, wherein when the optical fiber i... | 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 |
| 7437046 | Optical fiber configuration for dissipating stray light An optical transmission fiber is formed to include a relatively low-index, relatively thin outer cladding layer disposed underneath the protective polymer outer coating. Stray light propagating along an inner cladding layer(s) within the fiber will be refracted into... | 10/14/2008 |
| 7436585 | Chirped-pulse amplifier using photonic-crystal-rod (PCR) waveguides and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 10/14/2008 |
| 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 |
| 7433566 | Low bend loss optical fiber with high modulus coating Optical fiber having a coating surrounding and in direct contact with the silica based cladding region of the fiber, the coating having a Young's modulus of elasticity greater than 30 MPa. The optical fiber has low bend losses, especially low microbend induced losse... | 10/07/2008 |
| 7433565 | Side-scattering light guides The invention relates to side-scattering light guides that generally comprise a core of transparent optically homogenous material seeded with diffuser particles. The light guide also comprises an optically transmitting sheath, having a lower refractive index than th... | 10/07/2008 |
| 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 |
| 7428361 | Chromatic dispersion compensating and chromatic dispersion slope compensating fiber A chromatic dispersion compensating and dispersion slope compensating optical fiber comprises a central core having an index difference Δn1 with an outer optical cladding, a first buried inner cladding having an index difference Δn2 with the ... | 09/23/2008 |
| 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 |
| 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 |
