| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Method of manufacturing optical fibres | US728809 | 1991-07-11 | US5133794A | 1992-07-28 | Peter K. Bachmann; Hans-Jurgen E. Hagemann; Jacques P. M. Warnier; Howard J. C. Wilson |
| Polarization-retaining optical fibres are manufactured according to the PCVD method, in which on the inside of a glass tube and, simultaneously on at least two glass rods which are arranged inside the glass tube such that their longitudinal axes run parallel to the longitudinal axis of the glass tube, glass is deposited in layers and the glass rods are removed from the glass tube upon completion of the glass deposition process. Alternatively, a single glass rod, the radial dimensions of which in two mutually perpendicular directions are in a ratio unequal to one, i.e. elliptical, is arranged in a glass tube such that its longitudinal axis coincides with the longitudinal axis of the glass tube. | ||||||
| 182 | Single-mode, single-polarization optical fiber | US381038 | 1989-07-17 | US5056888A | 1991-10-15 | Michael J. Messerly; James R. Onstott; Raymond C. Mikkelson |
| A single-mode, single-polarization optical fiber ("PZ fiber") can have a large single-polarization wavelength bandwidth when .eta. (as herein defined) for one symmetry axis is positive when calculated from the refractive index profile determined with one of two orthogonal orientations of polarized light and is negative when calculated from the refractive index profile determined with the other orientation, and for each other symmetry axis of the novel optical fiber .eta. is positive for both orientations of plane polarized light. Preferably the absolute values for .eta. when positive and .eta. when negative are about equal for said one symmetry axis. A preferred PZ fiber can be formed by depositing siliceous layers onto the interior surface of a hollow substrate tube of quartz to provide a preform. After forming two parallel flat faces in its outer surface, the preform is pulled to form a PZ fiber having an ellipitcal stress-applying region. | ||||||
| 183 | Method of assembling a fiber optic preform from discrete preformed elements | US447554 | 1989-12-07 | US4978377A | 1990-12-18 | Claude Brehm; Josiane Ramos; Philippe Dupont |
| A method of providing a preform for a polarization-maintaining optical fiber, starting from a basic preform (1) having two orthogonal planes of symmetry intersecting along its axis, and mechanically applying two discrete preformed oblong elements (15) of silica doped with boron oxide on the outside face of said basic preform symmetrically about the first plane (20), and two oblong elements of silica doped with titanium oxide on the outside face of said basic preform and symmetrically about the second plane (30). The shapes of the basic preform and the four oblong elements are selected to define a substantially solid cylinder. | ||||||
| 184 | Method of coating optical fibers | US361385 | 1989-06-05 | US4950047A | 1990-08-21 | George E. Berkey; Robert M. Hawk |
| This invention relates to a method of drawing twist-free optical fibers; it is particularly useful for drawing polarization retaining single-mode optical fibers having azimuthal inhomogeneities. There is applied to the fiber, during the drawing thereof, a coating having a non-circular cross-section, the azimuthal inhomogeneity of the fiber being positioned in a substantially constant orientation with respect to the non-circular cross-section of the coating. In another embodiment, a plurality of fibers having azimuthal inhomogeneities are drawn from a plurality of preforms that are properly oriented in the draw furnace. The fibers are drawn through the same coater so that the azimuthal inhomogeneity of each fiber is oriented in a substantially constant relationship with respect to the azimuthal inhomogeneities of the remaining fibers in the coating. | ||||||
| 185 | Method of making polarization retaining optical fiber coupler | US361383 | 1989-06-05 | US4932740A | 1990-06-12 | George E. Berkey; Robert M. Hawk |
| A method of making a polarization retaining single-mode (PRSM) optical fiber coupler. A section of coating is stripped from the central portion of two PRSM optical fibers. The fibers extend through the bore of a glass tube, the stripped portions being centered in the tube, and the coating portions extending into the ends of the bore. In one embodiment, each fiber is provided with a rectangularly shaped coating, and the two larger flattened sides of the coating are specifically oriented with respect to the major and minor axes of the PRSM fiber therein. The fiber coating can be disposed in only one orientation in the rectangularly-shaped tube bore, thereby properly orienting the two PRSM fibers with respect to each other. In another embodiment, the PRSM fibers are disposed within a single coating, the azimuthal inhomogenity of one fiber being aligned in the coating with respect to that of the remaining fibers. In both embodiments, the fiber coating material is utilized to facilitate the alignment of the major axes of the fibers. The fibers are held taut, and the tube midregion is heated, collapsed about the fibers, and drawn to reduce the diameter thereof. | ||||||
| 186 | Method of manufacturing polarization-maintaining optical fibers | US141364 | 1988-01-05 | US4859223A | 1989-08-22 | Hiroshi Kajioka; Koudo Yamada; Yuuetsu Takuma; Tatsuo Teraoka |
| Two opposite portions of the surface of a core rod whose section is circular are removed by machining in the longitudinal direction thereof, so that the section of the core rod is transformed into a non-circular shape. On the surface of the thusly shaped non-circular core rod, glass particulates are accumulated, and then the glass particulates accumulated on the core rod are sintered to create a preform. Then, the preform is heated and drawn, so that a polarization-maintaining optical fiber of non-circular section is obtained. | ||||||
| 187 | 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. | ||||||
| 188 | Polarization preserving optical fiber and method of manufacturing | US43565 | 1987-04-28 | US4824455A | 1989-04-25 | Stephen C. Rand; Joseph A. Wysocki |
| An improved polarization preserving birefringent fiber optic member is provided having cross-sectional circular cladding and core members of soft glasses. A metallic coating of an approximately circular configuration, that is offset from the axis of the core and cladding members, is provided with sufficient thickness to provide an anisotropic variation in compressional strain on the core member to create the anisotropy of the refracted index of the core member for preserving polarization characteristics. The optical fiber can be formed by heating a mechanical composite of a core rod and cladding tube, drawing the core and cladding to form a fused fiber and transporting the drawn fiber through a coating bath to provide the variation in thickness. | ||||||
| 189 | Method of making low loss fiber optic coupler | US765652 | 1985-08-15 | US4799949A | 1989-01-24 | Donald B. Keck; Donald R. Lyons; Daniel A. Nolan |
| A low loss fiber optic coupler is fabricated by forming a coupler preform having a plurality of spaced glass cores extending longitudinally through a matrix of glass having a refractive index lower than that of the cores. The preform is heated and stretched to form a glass rod which is then severed into a plurality of units. Heat is applied to the central region of each unit while the ends of the unit are pulled apart to elongate and taper inwardly the heated central region, whereby the cores of the unit are more closely spaced and are of smaller diameter at the central region than they are at the ends of the unit. The unit is then provided with a plurality of optical fibers, one of which extends from each of the cores at the endfaces of the unit. A preferred method of providing the optical fibers involves forming the coupler preform of a matrix glass that is easily dissolved in a solvent. Each of the fiber cores within the matrix is surrounded by a layer of cladding glass that is relatively resistant to dissolving by the solvent. When an end of the unit is immersed in the solvent, the matrix glass dissolves, thereby leaving the unit cores and surrounding solvent-resistant cladding glass protruding from the newly formed endface of the unit. | ||||||
| 190 | Optical fiber and laser interface device | US105314 | 1987-10-05 | US4784454A | 1988-11-15 | Richard B. Dyott |
| A laser-optical fiber interface including the combination of a solid state laser producing a point source of polarized light and a polarization-holding, single-mode optical fiber. The optical fiber comprising a core and cladding of non-circular cross section and having different refractive indices forming a single mode guiding region which permits the de-coupling of waves polarized along the axis of the fiber. The outer surface of the fiber includes an indexing surface with a predetermined geometric relationship to the guiding region. The optical fiber being mounted upon a substrate for receiving and supporting the indexing surface of the fiber with the solid state laser so that the end of the fiber is placed and aligned adjacent the solid state laser. | ||||||
| 191 | Form polarizing fibers and method of fabrication | US734211 | 1985-05-15 | US4717225A | 1988-01-05 | John R. Feth; Chin-Lung Chang; Steven C. Furlong |
| A polarizing optical fiber has a core formed of a plurality of layers of dielectrics having different refractive indices. The dielectric layers form a composite structure having different refractive indices for light of different polarizations. The differing refractive indices cause the polarization states of light guided by the fiber to be non-degenerate so that energy ordinarily will not couple from one polarization to the other. The fiber includes a cladding that may have a refractive index either less than both core indices to provide a polarization maintaining fiber or greater than or equal to one of the core indices to provide a polarizing fiber. The method of fabrication of the layered core form birefringent optical fiber includes forming a structure of a plurality of layers of the dielectrics, heating the structure to form a monolith, stretching the monolith to form the fiber core, and adding the cladding to the core. | ||||||
| 192 | Polarized optical fiber and method of forming same | US627040 | 1984-07-02 | US4557742A | 1985-12-10 | Lawrence E. Thigpen |
| A polarized optical fiber, having inherent birefringence provided by electrically induced orientation of its microcrystalline structure provides fixed polarization. In the method, an optical fiber having inherent birefringent characteristics is formed by heating a glass optical fiber preform to its drawing temperature, drawing the preform to reduce its diameter and cooling the resulting fiber in the presence of an applied electric field to fixedly orient the microcrystalline structure of the fiber to provide birefringent light transmitting characteristics. | ||||||
| 193 | Single polarization optical fibers | US389265 | 1982-06-17 | US4500168A | 1985-02-19 | Hiroshi Kajioka; Toshihide Tokunaga; Junkichi Nakagawa |
| In the single polarization optical fiber of the present invention, an elliptical jacket is composed of SiO.sub.2 +P.sub.2 O.sub.5 +B.sub.2 O.sub.3, whereby increase in transmission loss at long wavelength band is prevented. In the process for fabricating single polarization optical fibers of the invention, a starting silica tube is subjected to pressure reduction with an amount of pressure reduction in response to concentration of dopants P.sub.2 O.sub.5 +B.sub.2 O.sub.3, whereby an ellipticity of the resulting elliptical jacket is made to be a pertinent value. | ||||||
| 194 | 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. | ||||||
| 195 | Noncircular symmetric optical fiber waveguide having minimum modal dispersion | US720982 | 1976-09-07 | US4106847A | 1978-08-15 | Jacques Alexis Arnaud |
| An optical fiber waveguide is disclosed wherein the cladding surrounds a fiber core having a noncircularly symmetric cross section. Equations are presented which dictate the value of the index of refraction that must be provided at each spatial point within the fiber core in order to construct a fiber waveguide having minimum modal dispersion. An especially useful optical fiber waveguide is disclosed with an elliptical fiber core thereby providing a fiber which can be more efficiently coupled to a light emitting source having an elongated source area such as in a heterojunction laser or an edge-emitting light emitting diode. | ||||||
| 196 | OPTICAL FIBER WITH BIREFRINGENCE AND LARGE MODE FIELD DIAMETER | PCT/US2005030941 | 2005-08-29 | WO2006026653A3 | 2006-04-20 | BERKEY GEORGE E; CHEN XIN; LI MING-JUN; NOLAN DANIEL A; ZENTENO LUIS A; WANG JI; WOOD WILLIAM A |
| According to the present invention the optical fiber includes a core with a first refractive index (n | ||||||
| 197 | ELLIPTICAL CORE FIBER WITH AXIALLY DECREASING ASPECT RATIO AND METHOD | PCT/US9706001 | 1997-04-11 | WO9740408A3 | 1997-12-04 | HAWK ROBERT M |
| A single-mode elliptical core optical fiber (15) suitable for the transmission of solitons has a core aspect ratio that changes along the length of the fiber to provide a fiber dispersion that monotonically decreases along the fiber from one end thereof to the other. The fiber preform (30) is drawn from a draw blank (10) having a glass core (11) surrounded by cladding glass (12) and having apertures (13) that are diametrically opposed with respect to the core (11). The cross-sectional area of the void space within the apertures (13) varies with respect to the longitudinal distance along the apertures. | ||||||
| 198 | AN IMPROVED POLARIZATION PRESERVING OPTICAL FIBER AND METHOD OF MANUFACTURING | PCT/US8800783 | 1988-03-14 | WO8808547A3 | 1989-04-06 | RAND STEPHEN C; WYSOKI JOSEPH |
| An improved polarization preserving birefringent fiber optic member is provided having cross-sectional circular cladding and core members of soft glasses. A metallic coating of an approximately circular configuration, that is offset from the axis of the core and cladding members, is provided with sufficient thickness to provide an anisotropic variation in compressional strain on the core member to create the anisotropy of the refracted index of the core member for preserving polarization characteristics. The optical fiber can be formed by heating a mechanical composite of a core rod and cladding tube, drawing the core and cladding to form a fused fiber and transporting the drawn fiber through a coating bath to provide the variation in thickness. | ||||||
| 199 | OPTICAL FIBER AND METHOD FOR MAKING SUCH FIBER | PCT/US2005004001 | 2005-02-09 | WO2005082801A3 | 2005-12-08 | KIMBALL RONALD L; KNOWLTON ROBERT A; MCCARTHY JOSEPH E; WANG JI; WALTON DONNELL T; ZENTENO LUIS A |
| According to one example of the invention an optical fiber comprises: (i) silica based, rare earth doped core having a first index of refraction n1; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n1> n2 with the following features, alone or in combination: said cladding includes 0.5 to 5 wt% F and 0.5 to 20 wt% B, said optical fiber has less than 8dB/km core background loss at a wavelength of 1280 nm. at least one of the core or cladding is doped with AI203 concentration is less than 2:1. | ||||||
| 200 | SINGLE POLARIZATION OPTICAL FIBER LASER AND AMPLIFIER | PCT/US2004032950 | 2004-10-07 | WO2005043700A3 | 2005-09-15 | NOLAN DANIEL A; LI MING-JUN; WALTON DONNELL T; ZENTENO LUIS A; BERKEY GEORGE E |
| An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48). | ||||||
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