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6859585 |
Optical filter
An optical filter comprising a slanted Bragg grating inscribed in an optical fiber portion comprising a core having a refractive index n 1 and a radius R core and a cladding having an average...
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6859596 |
Systems and methods for forming ultra-low PMD optical fiber using amplitude and frequency keyed fiber spin functions
A system and method is disclosed for manufacturing single mode optical fiber which incorporates a spin in the molten fiber during manufacturing. The introduction of spin minimizes a form of...
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6859599 |
Optical fiber, and optical amplifier and transmission system including the optical fiber
Optical fibers with high non-linearity and low dispersion suitable for the Raman amplification are offered. Their structural and characteristic specifics are as follows: first core 1 with α...
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6859597 |
Index-guiding microstructured optical fibers
An index-guiding microstructured optical fiber, having a majority of the cross-section of the core and cladding regions occupied by voids. The voids are dimensioned such that an effective index of...
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6856740 |
Optical fiber having an elevated threshold for stimulated Brillouin scattering
An optical fiber having an elevated threshold for stimulated Brillouin scattering is provided. The optical fiber includes a core and a cladding surrounding the core with both the core and the...
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6856741 |
Free space duplexed optical communication with transmitter end multiplexing and receiver end amplification
A free space wavelength duplexed system includes first and second terminals. The first terminal includes an optical transmitter and an optical receiver. The optical receiver has a telescope, an...
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6856739 |
Optical fiber for resisting hydrogen-induced loss
The invention provides an optical fiber composition which has a high resistance to aging upon exposure to hydrogen. The inventive optical fiber does not require further treatment steps, such as...
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6853784 |
Optical fiber
The present invention relates to an optical fiber comprising a structure enabling WDM transmissions by utilizing the whole wavelength range of 1300 nm to 1625 nm as a signal wavelength band. In the...
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6853798 |
Downhole geothermal well sensors comprising a hydrogen-resistant optical fiber
A new class of optical fiber based thermal sensors has been invented. The new sensors comprise hydrogen-resistant optical fibers which are able to withstand a hot, hydrogen-containing environment...
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6853786 |
Photonic-crystal fibers and photonic-crystal fiber devices
A photonic crystal fiber comprising: a core ( 20 ) having a refractive index; and a cladding region ( 10 ) at least substantially surrounding the core ( 20 ) and comprising a bulk material having a...
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6847770 |
Lens function-including optical fiber and method of producing the same
A lens function-including optical lens according to the present invention is constituted by: at least one step-index optical fiber; and at least one gradient index optical fiber having an outer...
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6845202 |
Optical fiber maximizing residual mechanical stress
An optical fiber for maximizing residual mechanical stress and an optical fiber grating fabricating method using the optical fiber are provided. The optical fiber includes a core formed of silica,...
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6842566 |
Optical fiber with built-in grating and optical fiber for forming grating therein
The present invention provides an optical fiber equipped with a grating that functions as a narrow-band loss filter. The optical fiber has a core, an inner cladding, an intermediate cladding, and...
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6839484 |
Optical fiber for single-mode operation
A single-mode fiber of increased core size consists of a “few-mode” fiber, of core size sufficient for guiding up to three high-order modes in addition to the fundamental mode, by interposing...
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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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6836608 |
Planar optical waveguide, method for manufacturing the same and polymer optical waveguide
A planar optical waveguide includes a layered film formed on a substrate, and an optical waveguide core formed in the layered film. A cross section of the optical waveguide core is substantially...
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6836606 |
Filled-core optical fiber and method of making the same
A filled-core optical fiber and method where the optical fiber is collapsed at opposing ends subsequent to the active optical material being introduced into the hollow core region. The...
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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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6832037 |
Waveguide and method of making same
The invention relates to a waveguide comprising a transparent polymeric central core clad externally with one or more polymeric layers, at least one of the core or clad layer containing layered...
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6810175 |
Off-axis mode scrambler
An apparatus and method for generating a mode-scrambled optical signal. A laser beam source directs an optical signal into a free end of a first segment of multimode fiber comprising a graded-index...
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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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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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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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6798962 |
Broadband access optimized fiber and method of making
The present invention provides an optical fiber, comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core...
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6795629 |
Optical fiber and optical communication system using this optical fiber
The present invention resides in an optical fiber able to form an optical transmitting line for wavelength division multiplexing transmission in a wavelength band of 1.5 μm using a Raman...
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6782175 |
Dispersion map for slope compensating fibers
An optical transmission system is provided. The system includes a series of consecutive blocks of optical fiber. Each block of the system includes a first, second and third series of spans of...
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6778747 |
Radially varying and azimuthally asymmetric optical waveguide fiber
Disclosed is a single mode waveguide fiber and a method of making a single mode or multimode waveguide fiber which has an azimuthally and radially asymmetric core. This asymmetry provides...
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6768851 |
Optical fiber for ultra-high capacity transmission
An optical fiber is described in which a core is surrounded by a cladding having a refractive index that varies periodically in the angular sense around the core. By appropriate design of the...
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6768847 |
Dispersion compensating module and fiber for control of residual dispersion
A dispersion compensating fiber and module are described for controlling residual dispersion in a dispersion compensated system. The dispersion compensating fiber is designed with dispersion curve...
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6768838 |
Optical module
An optical module for optically coupling an input side and an output side with each other through an optically functional portion inserted between the input side and the output side. At least one...
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6768850 |
Method of index trimming a waveguide and apparatus formed of the same
A method of using a beam of ultra-short laser pulses, having pulse durations below 10 picoseconds, to adjust an optical characteristic within an optical medium is provided. The beams would have an...
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6768849 |
Systems and methods for fabricating varying waveguide optical fiber device
Systems and methods are described for fabricating a varying-waveguide optical fiber. In one described method, a preform is fabricated having a core and at least one cladding region. The cladding...
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6766092 |
Compensation of the refractive index of doped InP
A mode transformer ( 10 ) includes a passive waveguide ( 120 ) having a first composition co-existing with a second composition to provide a guided optical wave ( 250 ). A p-doped re-growth layer (...
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6766091 |
Polymeric optical conductors
An optical cable, which is flame-retardant, and has excellent adhesion of the protective covering to the fiber cladding and uniform thickness of the fiber cladding, contains a polymer optical...
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6766087 |
Nonlinear dispersion-shifted optical fiber, optical signal processing apparatus using said optical fiber and wavelength converter using said optical fiber
Disclosed is a nonlinear dispersion-shifted optical fiber, wherein a charomatic dispersion at a wavelength of 1550 nm is equal to a set value required for optical signal processing utilizing a...
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6766089 |
Low-dispersion optical fiber and optical transmission system using the low-dispersion optical fiber
A low-dispersion optical fiber provides both reduced chromatic dispersion in a used wavelength band and increased effective core area. The low-dispersion optical fiber is made by covering a center...
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6754424 |
High dispersion zero waveguide fiber
Disclosed is a single mode optical waveguide fiber designed for use in high performance telecommunication systems. The novel core profile design improves bending performance to provide enhanced...
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6750294 |
Plastic optical fiber
A plastic optical fiber which is a graded index optical fiber having a concentric inner/outer at least two layer structure, wherein the inner layer has a graded index structure made of a...
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6751388 |
Fiber lasers having a complex-valued Vc-parameter for gain-guiding
The instant invention concerns optical fibers that have complex-valued V c -parameters due to gain g established by active dopants that are doped into the fiber core in accordance with a doping...
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6748151 |
Optical fiber attenuator with attenuating dopant limited to a central or peripheral area of the fiber core
An optical attenuator which provides almost the same degree of attenuation even when the difference in wavelength of two different kinds of input optical signals is small. Another optical...
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6741780 |
Coating for optical fibers and method of manufacturing thereof
Coating for an optical fiber and method of manufacturing thereof, the coating comprising at least one partly crosslinked polymer having a level of crosslinking which increases according to a radial...
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6738544 |
Thermally-shaped optical fiber and a method for forming the optical fiber
A thermally-shaped optical fiber and a method for forming the same so as to minimize the presence of optical artifacts in the optical fiber that contributes to insertion loss.
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6738550 |
Holey waveguide manufacture
A method of forming a holey waveguide, the method comprising the steps of forming a guiding region of a preform, forming a cladding region of the preform, wherein at least a portion of the cladding...
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6731846 |
Dispersion compensator and optical transmission system using same
The present invention aims to provide a dispersion compensator which is ultra small in size and low in cost and capable of controlling dispersion compensating values, and an optical transmission...
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6728456 |
Waveguide with nanoparticle induced refractive index gradient
An optical element comprising an elongated channel for light travel comprising a light transmitting polymeric central core and further comprising multilayer particles, wherein a majority of the...
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6728458 |
Optical fiber and fiber grating device
An optical fiber comprises a core region, an inner cladding region, and an outer cladding region. Each of the core region and inner cladding region is doped with GeO 2 , whereas the inner cladding...
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6724964 |
Optical waveguide exhibiting strongly positive dispersion, and system utilizing same
An optical waveguide designed to generate positive dispersion when operated in a high order mode. The optical waveguide in one embodiment is designed to generate positive dispersion slope, in...
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6724537 |
Lens array for unity magnification imaging, and image reading apparatus using the same array
A miniaturized lens array for unity magnification imaging comprises a plurality of rod lenses arranged in one row. An arrangement pitch D of the rod lenses is defined to satisfy (2 m+1)·D≦2.1 mm...
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6721481 |
Distributed optical fiber amplifier using fiber with specific characteristic values
An optical fiber transmission line including first, second and third optical fibers connected together so that light travels through the transmission line from the first optical fiber, then through...
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