Assignee: Crystal Fibre A/S

Location: Birkerod, DK
No. of patents: 29

Number	Title	Issue Date
7590323	Optical fibre with high numerical aperture, method of its production, and use thereof An article comprising an optical fiber, the fiber comprising at least one core surrounded by a first outer cladding region, the first outer cladding region being surrounded by a second outer cladding region, the first outer cladding region in the cross-section compr...	09/15/2009
7539382	Hermetically sealed optical fibre with voids or holes, method of its production, and its use An optical fiber having an axial direction and a cross section perpendicular to the axial direction, the optical fiber having a first light guiding fiber portion with a cladding region with a plurality of spaced apart cladding voids extending longitudinally in the f...	05/26/2009
7532798	Optical waveguide An elongate waveguide for guiding light including a core having an elongate region of relatively low refractive index; a microstructured region around the core comprising elongate regions of relatively low refractive index interspersed with elongate regions of relat...	05/12/2009
7532792	Optical coupler, a method of its fabrication and use An optical coupler for coupling light from at least two input fibers into one output fiber and a method of fabricating and use of an optical coupler. The coupler comprises a) an input section comprising an output end face at one end of the bundling-length of input f...	05/12/2009
7526165	Optical coupler devices, methods of their production and use The present invention relates in general to coupling of light from one or more input waveguides to an output waveguide or output section of a waveguide having other physical dimensions and/or optical properties than the input waveguide or waveguides. The invention r...	04/28/2009
7366388	Hollow-core optical fiber and method of making same An optical fiber having a cladding region surrounding a core region having an elongate core hole, the inner or outer surface of the core hole having a surface roughness with a spatial period equal to or less than 5 μm by a spectral power below 0.0017 nm2	04/29/2008
7349611	Photonic bandgap fibre, and use thereof A mircrostructured optical fiber that guides light in a core region, where the fiber has a cladding region that includes a background material and a number of cladding features or elements that are elongated in the longitudinal direction of the fiber and have a high...	03/25/2008
7346249	Photonic bandgap optical waveguide with anti-resonant core boundary Improved photonic band-gap optical fibre The present invention relates in particular to improved photonic band-gap optical fibres that can confine light to a core region of the fibre by the action of both a photonic band-gap cladding and an antiresonant core boundar...	03/18/2008
7327922	Hermetically sealed optical fibre with voids or holes, method of its production, and its use An optical fiber having an axial direction and a cross section perpendicular to said axial direction, said optical fiber comprising: a first light guiding fiber portion (604) having a cladding region with a plurality of spaced apart cladding voids extending l...	02/05/2008
7321712	Optical waveguide An elongate waveguide for guiding light includes a core having an elongate region of relatively low refractive index; a microstructured region around the core having elongate regions of relatively low refractive index interspersed with elongate regions of relatively...	01/22/2008
7305164	Enhanced optical waveguide Novel preforms and methods of making novel preforms are described. The preforms are suitable for being drawn into photonic bandgap optical fibres. In one form, the preform comprises a stack of elongate members having, in transverse cross section, a triangular close-...	12/04/2007
7289709	Photonic crystal fibres comprising stress elements A photonic crystal fiber includes a core region for propagating light in a longitudinal direction of the fiber, a cladding region surrounding the core region, the cladding region including micro-structural elements extending in the longitudinal direction. The claddi...	10/30/2007
7266275	Nonlinear optical fibre method of its production and use thereof An optical fiber having a longitudinal direction and a cross-section perpendicular thereto, said fiber in a cross-section comprising: (a) a core region (11) having a refractive index profile with a highest refractive index nc, and (b) a cladding re...	09/04/2007
7245807	Optical fiber and method for making an optical fiber A photonic optical fiber and method of making the optical fiber. The method includes assembling a plurality of elongate elements to define an elongate void; forming within the void a material contacting at least some of the elements while maintaining the elongate vo...	07/17/2007
7224873	Optical fibres Photonic crystal fibers that guide light by virtue of a photonic band gap. Fibers that are formed from materials having higher refractive indices than silica are provided using an optical waveguide including a core with a relatively low refractive index and a photon...	05/29/2007
7221840	Microstructured optical fibre with cladding recess, a method of its production, and apparatus comprising same A microstructured optical fibre comprising an inner cladding and an outer cladding; said outer cladding comprising elongated outer cladding features extending in an axial direction of the fibre, and at least one cladding recess extending at least partly through the ...	05/22/2007
7174078	Dual core photonic crystal fibers (PCF) with special dispersion properties An optical fiber for transmitting light, said optical fiber having an axial direction and a cross section perpendicular to said axial direction, said optical fiber comprising: (1) a first core region comprising a first core material having a refractive index Nc...	02/06/2007
7155097	Fabrication of microstructured fibres A preform for a microstructured fibre or a part for a preform for a microstructured fibre. The preform or part has a length in the longitudinal direction and a cross section perpendicular thereto, and includes a rod arranged at the centre of the preform or part, wit...	12/26/2006
7116875	Preform holey optical fibre, a holey optical fibre, and a method for their production A holey optical fibre for supporting propagation of light of a wavelength λ,comprises a plurality of cylinders (10) each having a longitudinal axis, the cylinders (10) being separated from each other by regions of a matrix material (20) and hav...	10/03/2006
7106932	Method and apparatus relating to optical fibers A method of joining a first optical fiber (110) to a second optical fiber (130) comprises the steps of: (i) providing a preform element (10) comprising material defining a primary elongate cavity (40); (ii) inserting the first optical fib...	09/12/2006
7062140	Composite material photonic crystal fibres, method of production and its use An optical fibre for transmission of light at a predetermined wavelength, the fibre having a core region, an inner cladding region and an outer cladding region, the inner cladding region having spaced apart voids, at least some of which are at least partly filled wi...	06/13/2006
6990282	Photonic crystal fibers A photonic crystal fiber comprising a bulk material having an arrangement of longitudinal holes, the fiber including a cladding region and a guiding core (280), the cladding region having an effective-refractive-index which varies across the fiber's cross sec...	01/24/2006
6972894	Optical wavelength converter An optical wavelength conversion device including a micro-structured optical waveguide, which includes sections with a non-linear material having an index of refraction which changes as a non-linear function of light intensity. The optical waveguide includes a light...	12/06/2005
6954574	Photonic crystal fibres A photonic crystal fiber comprising a bulk material having an arrangement of longitudinal holes (130, 140) and a guiding core (135), wherein the fiber has at-most-two-fold rotational symmetry about a longitudinal axis and as a result of that lack of sy...	10/11/2005
6892018	Micro-structured optical fiber A microstructured fiber having a cladding comprising a number of elongated features that are arranged to provide concentric circular or polygonial regions surrounding the fiber core. The cladding comprises a plurality of concentric cladding regions, at least some of...	05/10/2005
6888992	Photonic crystal fibres In a method of producing a photonic crystal fibre, a preform (300) that includes holes is formed and the preform (300) is drawn into a fibre. The method includes the step of applying a pressure differential to certain of the holes to control changes in...	05/03/2005
6856742	Optical fibres with special bending and dispersion properties A microstructured optical fiber having a specially designed cladding to provide single mode waveguidance and low sensitivity to bending losses. In one aspect the optical fiber has an inner and an outer cladding each comprising elongated features. The inner cladding ...	02/15/2005
6792188	Dispersion manipulating fiber The present invention relates to optical fibers and especially to optical fibers having microstructures in core and/or cladding region(s). The fibers may be utilized for dispersion compensation and non-linear applications. ...	09/14/2004
6542681	Polarization preserving optical fibre A micro-structured optical fibre having a cladding comprising a number of elements having a non-circular cross-section. Each element has at least one part extending outside a circle having the same cross-sectional area as the element. These extending part...	04/01/2003

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Assignee: Crystal Fibre A/S