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6839473 |
Optical fiber cladding with low polarization dependence and an acousto-optic tunable filter with low polarization dependent loss achieved through thermal annealing
This invention relates to a method of making optical fiber having low polarization dependence and an acousto-optical filter with low PDL. A section of the fiber is heated and then allowed to cool....
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6839486 |
Chiral fiber grating
A a chiral fiber grating mimicking a cholesteric liquid crystal structure to achieve fiber Bragg grating properties, is provided. The chiral fiber grating includes a first and a second helical...
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6836418 |
Slant short-period grating
There is provided a slant short-period grating which is obtainable by irradiating light onto an optical fiber whose core is formed from quartz glass to which has been doped a photosensitive dopant...
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6836605 |
Optical fiber preform, production method thereof, and optical fiber produced from the preform
An optical fiber preform having a low core noncircularity and eccentricity for producing an optical fiber having an improved polarization mode dispersion, a method for producing the preform, and an...
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6835679 |
Lossy fiber UV curing method and apparatus
A method and apparatus for light curing of composite materials in which the radiation required to initiate the curing is delivered via one or more lossy fiber optics. The fiber optics are made...
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6834150 |
Optical waveguide
An optical waveguide has a core, wherein the core is doped with laser-active ions, and also additionally doped with Ce.
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6830386 |
Optical transmission line and method of manufacture
A low splice loss optical fiber transmission line is disclosed which has a first optical fiber portion and a second optical fiber portion, the first and second optical fiber portions having...
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6832051 |
Dispersion managed optical transmission links for wavelength division multiplexed systems
A dispersion managed link for transmitting wavelength division multiplexed (WDM) optical signals and method for providing the link are disclosed. The link includes a plurality of spans serially...
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6832026 |
Optical fiber having high temperature insensitivity over a temperature range centered on a selected temperature and method of making same
An optical fiber for use in making components of an optical communication system has cladding and core materials the constituents of which cause a component made from the fiber to have a rate of...
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6826339 |
Electromagnetically induced transparent (EIT) photonic band-gap fibers
An electromagnetically induced transparent (EIT) photonic band-gap fiber (PBG). The EIT-PBG combines the pass gap and band gap properties of a photonic band gap (PBG) fiber with the transparency...
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6825966 |
Optical phase shifting device
An electrically adjustable phase-shifting device is arranged on a substrate comprising at least a first waveguide designed for guiding optical signals and a thermoelectric element arranged adjacent...
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6826340 |
Optical pulse transmission lines
An optical pulse transmission line portion is provided, having dispersion slope compensation, including an optical waveguide (length L 1 , dispersion parameter D 1 ) having a dispersion slope...
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6826341 |
Systems and methods for reducing splice loss in optical fibers
Optical fibers are described that exhibit reduced splice loss. Further described are techniques for fabricating optical fibers exhibiting reduced splice loss. One described fiber includes a...
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6826342 |
Temperature tuning of dispersion in photonic band gap fiber
A photonic band gap fiber structure is formed to include a plurality of filled air holes surrounding a solid silica core region. The material used to fill the air holes is chosen to exhibit an...
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6823123 |
Method and apparatus for providing dispersion compensation
The present invention enables the usable bandwidth of an optical fiber transmission link to be increased. The transmission fiber of the link with a is coupled with a dispersion compensation fiber...
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6821917 |
Tellurite glass and applications thereof
A tellurite glass material has a composition of Li 2 O:TiO 2 :TeO 2 , and contains a dopant comprising ions of a rare earth metal. The rare earth ions can be thulium ions, Tm 3+ , to provide a...
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6823122 |
P-Si Er fiber profile
An optical fiber for signal amplification comprises a core, doped with at least 15% phosphorus by weight and a rare earth ion sufficient to provide amplification of an optical signal. The fiber...
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6823125 |
Optical fiber base material, its manufacturing method and optical fiber
A porous glass intermediate body constructed by a core original layer formed as a core portion of an optical fiber, and a first clad original layer formed as a first clad portion of the optical...
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6819846 |
High absorption erbium doped amplifying optical fiber
An optical waveguide fiber amplifier comprising a core region comprises at least in part between 1300 wt.ppm and 3600 wt.ppm Er 2 O 3 , between 6.0 wt. % to 10.0 wt. % Al 2 O 3 and between 9.0 wt....
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6819861 |
Laminated optical waveguide array, beam collecting device and laser emission device
A beam collecting device and a laser emission device are disclosed incorporating a laminated optical waveguide array and refraction means therein. The laminated optical waveguide array is composed...
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6819847 |
Optical fiber and optical transmission path
An optical fiber having a chromatic dispersion of +1.0 ps/nm/km or more in a 1460 nm wavelength band, a dispersion slope of 0.04 ps/nm 2 /km or less in a 1550 nm wavelength band, and a cutoff...
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6819848 |
Method of winding optical fiber on reel
A method of winding an optical fiber on a reel, utilizing the optical fiber having the following characteristics: effective area is larger than 50 μm 2 , zero dispersion wavelength is outside a...
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6819852 |
Optimized defects in band-gap waveguides
Disclosed is a photonic band-gap crystal waveguide having the physical dimension of the photonic crystal lattice and the size of the defect selected to provide for optimum mode power confinement to...
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6815004 |
Method of production of a coating composition
Method of production of a coating composition useful for covering glass fiber by means of a polymeric composition consisting of an aqueous suspension or emulsion of a polymer. The coating...
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6816658 |
Photonic crystal fiber with a large effective surface area
An optical fiber with a large effective surface area has holes at points in at least two layers concentric with the fiber of points of a regular matrix. The holes in one layer have the same...
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6816659 |
Unit for compensating the chromatic dispersion in a reconfigurable manner
Unit ( 100 ) comprising a portion of holey optical fibre ( 12 ) having a length Lc comprising a core region ( 13 ) and a cladding region ( 14 ), said cladding region ( 14 ) comprising, in turn, a...
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6814376 |
Method and system for generating short pulse signals
A short pulse generation system and method of generating a short pulse signal are provided. The system includes a fiber chain having an input for receiving an optical signal having a plurality of...
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6816657 |
Raman fiber optic amplifier with reduced dispersion
A pumped Raman fiber optic amplifier includes two optical fibers whose lengths are determined so that the fibers exhibit dispersions of substantially equal magnitude and opposite sign at the...
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6813425 |
Fiber optic cable for increased transmission capacity and wavelength division multiplexing optical transmission system using the same
Disclosed is a fiber optic cable for a wavelength division multiplexing (WDM) optical transmission system including a plurality of connected optical fibers, wherein each of the connected optical...
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6813426 |
Fiber with continuously changing chromatic dispersion
The invention provides a fiber with continuously changing chromatic dispersion; it limits the quantity of dispersion-compensating fiber needed in a transmission system to compensate the cumulative...
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6813424 |
Optical communications link
The present invention provides an optical communications link having at least one optical fiber, in particular for communications transmission, where the optical fiber is repeatedly bent. The fiber...
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6813427 |
Fluorescence based liquid core waveguide
A liquid core waveguide for fluorescence spectroscopy is provided. According to one version of the present invention, a substantially cylindrical support tube is provided, having a substantially...
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6810184 |
Device and method to scatter optical fiber output
The present invention provides improved diffusion tips for optical fibers and methods of making the same. Nanoporous silica clad optical fibers are used to make fibers having integrally formed...
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6810186 |
Optical transmission line
An optical transmission line according to the present invention is an optical transmission line which is able to control both the waveform distortion due to the non-linearity phenomenon and the...
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6804441 |
Optical fiber, optical fiber component and optical transmission method
An optical fiber comprising a core and a cladding region which covers an outer periphery of the core, having a zero-dispersion wavelength in a wavelength range of 1.4 μm to 1.65 μm, and being in...
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6801699 |
High capacity optical waveguide fiber
An optical waveguide fiber that simultaneously exhibits large effective area and good resistance to bend induced attenuation, as measured by any of the tests known in the art. The cut off...
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6801689 |
Correcting the phase of waveguide bragg gratings
A waveguide may be translated relative to the optical system that creates the grating in the waveguide. Phase errors that arise from the writing process may be corrected by appropriate translations...
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6801270 |
Backlight for a liquid crystal display having high light-recycling efficiency
A backlight for a liquid crystal display (LCD) employing light recycling. In one embodiment the backlight includes a light guide fabricated from a substantially non-absorptive material and a...
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6801698 |
High index-contrast fiber waveguides and applications
High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.
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6798961 |
Optical fiber and optical fiber wiring board using the optical fiber
Optical fibers ( 220 ) are routed over a substrate ( 210 ), and an optical fiber wiring board ( 200 ) is thereby constructed. A relative refraction index difference Δ of the optical fiber ( 220 )...
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6797657 |
Tm-doped fluorophosphate glasses for 14xx amplifiers and lasers
A host material for Tm 3+ -doping is provided. The host material is a fluorophosphate glass having a non-zero concentration of Tm 3+ , cation elements that include at least an alkaline earth,...
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6795608 |
Optical communication link
An optical communication link that has an optical transmission line constructed by combining a positive dispersion optical fiber having a positive dispersion value with a negative dispersion...
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6795628 |
Broadband optical fiber
Provided is an optical fiber that is in particular suitable for Raman amplification. An effective area at a wavelength of 1570 nm is in a range of 35 μm 2 to 45 μm 2 , an absolute value of a...
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6795627 |
Light waveguide and an optical fiber isolator
The invention describes an optical waveguide and a fiberoptic isolator wherein the optical waveguide rotating the plane of polarization of coupled light consists of a fiber core ( 11 ) exhibiting...
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6792187 |
Ca-Al-Si oxide glasses and optical components containing the same
Glasses in the Ca—Al—Si system are useful in forming optical components for use in telecommunication systems. The glasses include, in mole percent: SiO 2 present in an amount of about 6 to...
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6792186 |
Light fibers and methods for producing the same
A light fiber comprising (a) a tubular clad having a predetermined length and (b) a solid core formed by reacting a filler material with which the clad is filled, the clad and the core being...
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6790529 |
Multimode fiber having a refractive index profile
The present invention relates to a multimode fiber having a refractive index profile, wherein the area surrounding the center of the fiber has a refractive index profile such that the responses of...
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6792214 |
Dispersion compensation in optical fiber transmission lines
An optical transmission system designed for gigabit pulse rates and Raman pumping in which there is essentially no pre-dispersion compensation and the in-line dispersion compensation at the start...
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6792166 |
Laser assisted thermal poling of silica based waveguides
A method of thermally poling a silica based waveguide ( 12 ) comprises exposing a region of the waveguide ( 12 ) to an electric field (for example, via capillary electrodes ( 22, 24 ) inserted into...
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6788865 |
Polarization maintaining optical fiber with improved polarization maintaining property
A polarization maintaining optical fiber is formed by using a core in a cross sectional shape having different diameters along two orthogonal axes defined on a plane perpendicular to an optical...
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