子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Optical fibres with special bending and dispersion properties | US10416023 | 2001-11-12 | US06856742B2 | 2005-02-15 | Jes Broeng; Stig Eigil Barkou Libori; Anders Overgaard Bjarklev |
| 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 features have normalized dimensions in the range from 0.35 to 0.50 and the outer cladding features have normalized dimensions in the range from 0.5 to 0.9, where the normalization factor is a typical feature spacing. The fiber is further characterized by a feature spacing of the inner cladding larger than 2.0 micron. In a second aspect, the fiber has a special non-circular and non-equilateral-polygonial outer cross-sectional shape to mechanically ensure bending in predetermined directions that are favourable with respect to low bending losses. The present invention provides fibers, which are less sensitive to macro-bending losses than presently known single-mode fibers with similar sized mode areas, and provides robust, single-mode, large-mode area fibers for long-distance optical transmission and fibers with special dispersion properties. | ||||||
| 82 | Cladding-pumped optical fiber and methods for fabricating | US10875749 | 2004-06-24 | US20050008313A1 | 2005-01-13 | Kanishka Tankala; Adrian Carter |
| Disclosed is an optical fiber article for receiving pump radiation of a first wavelength for amplifying or generating radiation of a second wavelength. The optical fiber article includes a core for propagating light of the second wavelength. The core has a first index of refraction and includes a rare earth material. A cladding surrounds the core and has a second index of refraction that is less than the first index of refraction. The outer circumference of the cladding can include a plurality of sections, where the plurality of sections includes at least one substantially straight section and one inwardly curved section. The optical fiber article can also include at least one outer layer surrounding the cladding, where the index of refraction of the outer layer is less than the second refractive index. Methods for producing the optical fiber article are also disclosed, as well as methods for providing a preform for drawing such an optical fiber article. | ||||||
| 83 | Cladding-pumped optical fiber and methods for fabricating | US10287322 | 2002-11-04 | US20030059184A1 | 2003-03-27 | Kanishka Tankala; Adrian Carter |
| Disclosed is an optical fiber article for receiving pump radiation of a first wavelength for amplifying or generating radiation of a second wavelength. The optical fiber article includes a core for propagating light of the second wavelength. The core has a first index of refraction index and includes a rare earth material. A cladding surrounds the core and has a second index of refraction that is less than the first index of refraction. The outer circumference of the cladding can include a plurality of sections, where the plurality of sections includes at least one substantially straight section and one inwardly curved section. The optical fiber article can also include at least one outer layer surrounding the cladding, where the index of refraction of the outer layer is less than the second refractive index. Methods for producing the optical fiber article are also disclosed, as well as methods for providing a preform for drawing such an optical fiber article. | ||||||
| 84 | Optical fiber gratings having internal gap cladding for reduced short wavelength cladding mode loss | US09519382 | 2000-03-03 | US06415079B1 | 2002-07-02 | Geoffrey L. Burdge; Benjamin J. Eggleton; Thomas A. Strasser; Paul S. Westbrook; Robert S. Windeler |
| The present invention is predicated on applicants' discovery that an appropriately spaced and dimensioned internal gap cladding can substantially reduce short wavelength cladding mode loss in a fiber Bragg grating. A fiber Bragg grating is provided with a ring of closely spaced, longitudinally extending gap regions in the glass peripherally surrounding the core. The gaps are spaced apart by thin glass webs having a thickness less than a wavelength of the light being transmitted and are disposed peripherally about the core at a distance of 2-10 wavelengths from the core center. The thin webs limit the passage of the light between the gaps. The combination of webs and gaps acts as an internal thin cladding which supports fewer cladding modes than conventional glass cladding and, significantly, provides increased wavelength spacing between the Bragg resonance and the first cladding mode resonance. | ||||||
| 85 | Apparatus and method for manufacturing fiber gratings | US09925590 | 2001-08-09 | US20020071881A1 | 2002-06-13 | Victor Il?apos;ich Kopp; Azriel Zelig Genack; Richard Mead |
| In accordance with the apparatus and method of the present invention an optical fiber is heated and twisted to produce a periodic modulation of the dielectric constant along the fiber axis. This structure can be used in any application that utilizes Bragg grating optical fibers. A preform is drawn through a heater and the resulting optical fiber is twisted about its longitudinal axis. The refractive index modulation in the optical fiber arises from birefringence induced by stress in the optical fiber that is twisted after being subjected to an uneven heat distribution during the drawing process. The refractive index is modulated by drawing and twisting the optical fiber from a specially constructed preform which is non-cylindrically symmetrical. | ||||||
| 86 | Optical fiber | US09306498 | 1999-05-06 | US06404966B1 | 2002-06-11 | Satoki Kawanishi; Katsunari Okamoto |
| An optical fiber including a core having an area of about several times an optical wavelength and composed of a hollow hole, and a cladding having a diffraction grating which is arranged at least in a peripheral area adjacent to the core and has a grating period equal to ½ the optical wavelength. | ||||||
| 87 | Partially detached core optical waveguide | US50509 | 1993-04-20 | US5307436A | 1994-04-26 | George E. Berkey |
| An optical waveguide fiber is made substantially bend less resistant by providing a core member partially detached from a cladding member. A core rod is suspended within a cladding preform. The assembly is heated and drawn into a waveguide fiber. The partial detachment is achieved by proper choice of preform dimensions and drawing parameters. Alternatively, a positive pressure may be applied to the preform interior to produce the partial detachment. The partial detachment of the core member from the cladding substantially isolates the core member from external forces, thereby making the waveguide substantially bend resistant. The preferred detachment fraction is more than 95% of the core member periphery. Essentially any waveguide which can be fabricated using a core rod inserted in a cladding tube, can be made to have a partially detached core member. The waveguide types to which the invention applies include single mode, multimode and polarization retaining single mode. To obtain further core member isolation, a waveguide may be fabricated which has a first cladding partially attached to a second cladding and the core member partially attached to the second cladding. Making bend resistance intrinsic to the waveguide, allows greater freedom in choice and application of waveguide coatings and cable designs. | ||||||
| 88 | Optical fiber having a core with a repeatedly changing constitutional parameter | US895480 | 1992-06-08 | US5267339A | 1993-11-30 | Ryozo Yamauchi; Akira Wada; Tetsuo Nozawa; Daiichirou Tanaka; Tetsuya Sakai |
| The present invention is directed to an optical fiber comprising a core and a cladding layer wherein at least one of the constitutional parameters thereof changes along the longitudinal direction of the optical fiber. In order to present a useful optical fiber wherein the occurrence of a Brillouin scattering is prevented, an optical fiber having altered constitutional parameters is found to be effective. The constitutional parameters mean the parameters which determine the constitution of the optical fiber and is capable of influencing the condition of electromagnetic wave transmitting therethrough such as light or acoustic wave. The constitutional parameters include diameter of the core, index of refraction of the core, diameter of the optical fiber, composition of the glass, residual stress of the core. Some examples are disclosed about their manufacturing process and the test results. Much improvement was measured, especially in the use for a single mode optical fiber. | ||||||
| 89 | Passive fiber-optic component | US49621 | 1987-05-13 | US4986620A | 1991-01-22 | Adrianus P. Severijns; Petrus J. W. Severin; Cornelus H. M. Van Bommel |
| A passive fiber optic component, in which two or more fibers are each bared at one end by removal of the outer coating of the fiber. The bare portions of the fibers are etched to produce cylindrical end portion which adjoins a conical portion. Subsequently, the fibers are arranged with their etched portions in a capillary tube which is sealed at one end. The tube is then evacuated and is fused with the etched portions of the fibers to form a solid rod with a rotationally symmetric distribution of the end portions of the fibers. The fibers are etched to such a diameter that after fusion of the fibers with the tube, the fused fiber ends have a circular cross-section substantially equal to the cross-section of a single fiber core. An end face is formed on the rod by cleaving or by grinding, and by polishing to obtain a fused fiber head. The fiber head forms a fiber optic component itself, or forms a basic element for a great number of fiber optic components such as splitters and couplers. | ||||||
| 90 | Polarization plane maintaining optical fiber fabricating method | US883456 | 1986-07-08 | US4828592A | 1989-05-09 | Hiroyoshi Matsumura; Toshio Katsuyama; Tsuneo Suganuma |
| An optical fiber having an intense polarization plane maintenability is constructed of an optical waveguide having a circular core and a circular cladding, a jacket formed on the outer circumference of the optical waveguide and having an elliptical outer circumference, and a supporting portion formed on the jacket.In order to fabricate the above-specified optical fiber, a preformed rod therefor is prepared by forming the inner wall of an silica glass tube with the jacket and the optical waveguide made of such materials as satisfy a relationship of c.sub.2 /a.gtoreq.200/(100-.gamma.)-1, wherein: letter .gamma. stands for the ellipticity of the outer circumference of the aforementioned jacket; letter c.sub.2 stands for the minor axis of an ellipse; and letter a stands for the radius of the circular optical waveguide, and by subsequently collapsing the aforementioned silica glass tube while having its internal pressure made lower than the atmospheric pressure by 1 to 20 mmH.sub.2 O. | ||||||
| 91 | Method of making variable section fiber optics | US704518 | 1985-02-22 | US4707172A | 1987-11-17 | Stefano Sottini; Massimo Brenci; Riccardo Falciai; Vera Russo |
| A device for transferring the energy emitted by a high power laser onto a target characterized in that it comprises two guides of optical fibre having step index refraction distribution and at least a plastic material coating. The first guide, stiffly coupled to the laser source, is a variable section fibre with an input face of larger diameter. Guide is the second one by a uniform or variable section fibre with a larger diameter near the output terminal. The two guides are joined by a low leakage optical fibre connector, and between them an adapter can be interposed if the output section of the first guide of fibre does not coincide with the input section of the second guide of fibre. The variable section fibre can be drawn from a pre-moulded or melted material, with the speed controlled by an electronic circuit. Different kinds of pots can be utilized in order to obtain the fibre plastic coating. | ||||||
| 92 | Optical fiber and method of producing the same | US223747 | 1981-01-09 | US4426129A | 1984-01-17 | Hiroyoshi Matsumura; Toshio Katsuyama; Tsuneo Suganuma |
| A glass layer is formed inside a silica glass tube and another glass layer having a refractive index higher than that of the abovementioned glass layer is formed on said glass layer. After these glass layers are formed, one end of the glass tube is collapsed. While the internal pressure of the glass tube is being reduced below the atmospheric pressure, the glass tube is caused to collapse by heating, thereby yielding a preform for an optical fiber. The optical fiber produced from this preform has the difference in the refractive indices of the two orthogonal major axes of at least 1.6.times.10.sup.-4 and maintains the linear polarization plane. | ||||||
| 93 | Crucible for the production of single-material light-guiding fibers | US761267 | 1977-01-21 | US4131447A | 1978-12-26 | Hubert Aulich; Josef Grabmaier |
| A method for the production of single-material light-guiding fibers which have a core supported in a glass sheath in a cantilever manner by glass webs characterized by providing a crucible having an exit nozzle with an opening having a configuration of the cross section of the light-guiding fiber with a core portion connected by web portions to a surrounding annular portion, providing molten material of the light-guiding fiber in the crucible, drawing the molten material from the crucible through the exit nozzle to form a continuous integral workpiece having a core portion supported in a glass sheath in a cantilever manner by integral glass webs and continuously drawing the integral workpiece into the single-material light-guiding fiber. The crucible is formed by a pair of hollow bodies supported in an outer cylindrical member in a cantilever manner so that the cylindrical member and the pair of hollow bodies form the exit nozzle with the desired configuration. | ||||||
| 94 | Single material optical fiber structures including thin film supporting members | US54629375 | 1975-02-03 | USRE28664E | 1975-12-23 | |
| Optical fibers, for propagating optical radiation in guided modes, are fabricated in an integral structure. Advantageously, the fiber structure is made of a single filamentary material, such as fused silica, with a relatively large cross section at the central portion of the fiber and with a relatively thin film portion at the extremities of the fiber. The thin film portion has a thickness larger than the wavelength of the optical radiation to be propagated and serves as a supporting member for the central portion of the fiber. Such optical fiber structures are capable of propagating either single mode or multimode guided optical waves. In addition, the exposed surface of the central portion (which is not contacted by the thin film supporting member portion) can be contacted with an optically nonlinear material, in order to provide suitable interactions with the propagating signal wave energy and thereby to produce electrooptic effects such as amplification, modulation, or laser action.
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| 95 | Capillary tube gas discharge device | US8609470 | 1970-11-02 | US3927342A | 1975-12-16 | BODE WOLFGANG W; DUNLAP GLENN H; KOBYLAK ANTHONY M; RICHARDS RAYMOND S; PFAENDER LAWRENCE V |
| Methods of making complex glass panel structures having precision dimensions. Glass tubes, rods, plates or other large glass structures are redrawn individually or in groups to filamentary or capillary size tube or gas continuums which are assembled as a monolayer to form a gas discharge panel, for example. Complex glass structures having precision uniform crosssectional dimensions are constructed. Various novel glass structures and/or conductor configurations and methods of assembling are disclosed.
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| 96 | Method for fabricating an optical fiber cable | US38948173 | 1973-08-20 | US3844752A | 1974-10-29 | KAISER P |
| In order to fabricate a number of multimode single material optical fibers in a single cable, an array of both hollow thinwalled glass tubes and solid glass rods of the same material are placed within the cable to provide the preform assembly for a multiple-core fiber cable. An optical waveguide is formed by each solid rod being supported within the hollow cable by the adjacent hollow tubes. Thereby, each core in the final structure is capable of supporting multimode optical propagation.
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| 97 | Method of making gas discharge device | US3654680D | 1970-11-02 | US3654680A | 1972-04-11 | BODE WOLFGANG W; DUNLAP GLENN H; KOBYLAK ANTHONY M; RICHARDS RAYMOND S; PFAENDER LAWRENCE V |
| Methods of making complex glass panel structures having precision dimensions. Glass tubes, rods, plates or other large glass structures are redrawn individually or in groups to filamentary or capillary size tube or gas continuums which are assembled as a monolayer to form a gas discharge panel, for example. Complex glass structures having precision uniform crosssectional dimensions are constructed. Various novel glass structures and/or conductor configurations and methods of assembling are disclosed.
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| 98 | Capillary tube gas discharge display panels and devices | US3602754D | 1969-04-28 | US3602754A | 1971-08-31 | PFAENDER LAWRENCE V; BODE WOLFGANG W; DUNLAP GLENN H; KOBYLAK ANTHONY M; RICHARDS RAYMOND S |
| There is disclosed a multiple discharge gas display/memory panel of the type in which filamentary or capillary size gas tubes or gas continuums are assembled and formed as a monolayer to form the gas discharge panel.
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| 99 | Method of making optical couplers | US3455667D | 1966-05-06 | US3455667A | 1969-07-15 | SNITZER ELIAS; BAZINET WILFRED P JR; HWALEK DAVID C |
| 100 | Method of thermally drawing structured sheets | US15426448 | 2017-02-07 | US09994476B2 | 2018-06-12 | Esmaeil Banaei |
| A method of drawing a material into sheet form includes forming a preform comprising at least one material as a large aspect ratio block wherein a first transverse dimension of the preform is much greater than a second transverse dimension substantially perpendicular to the first transverse dimension. A furnace having substantially linearly opposed heating elements one spaced from the other is provided and the heating elements are energized to apply heat to the preform to create a negative thermal gradient from an exterior surface along the first transverse dimension of the preform inward toward a central plane of the preform. The preform is drawn in such a manner that the material substantially maintains its first transverse dimension and deforms across its second transverse dimension. | ||||||
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