| Patent Number |
Title Of Patent |
Date Issued |
| 7437046 |
Optical fiber configuration for dissipating stray light |
October 14, 2008 |
| An optical transmission fiber is formed to include a relatively low-index, relatively thin outer cladding layer disposed underneath the protective polymer outer coating. Stray light propagating along an inner cladding layer(s) within the fiber will be refracted into the thin outer claddi |
| 7043128 |
Multimode optical fibers with increased bandwidth |
May 9, 2006 |
| The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth. |
| 6966201 |
High-temperature sintering of soot bodies doped using molecular stuffing |
November 22, 2005 |
| Techniques are described for fabricating a preform from a soot body. In one described technique, a soot body is loaded into a substrate tube, and the position of the soot body is stabilized within the tube. The tube is then rotated around its longitudinal axis. Heat is applied from a hea |
| 6899470 |
Systems and methods for fabricating low-loss, high-strength optical fiber transmission lines |
May 31, 2005 |
| Systems and techniques are described for fabricating a low-loss, high-strength optical transmission line. In one described technique, a first fiber is spliced to a second fiber at a splice point. The spliced fibers are loaded into a heat treatment station, where a gas torch flame is |
| 6826341 |
Systems and methods for reducing splice loss in optical fibers |
November 30, 2004 |
| 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 plurality of regions, one region having a higher viscosity and the other region having a lower |
| 6785472 |
Broadband amplified WDM ring |
August 31, 2004 |
| A fiber-optic WDM ring carries communication traffic among a plurality of nodes, each node associated with respective subscriber premises. Remote gain is provided in at least one link of the ring. In specific embodiments of the invention, the remote gain is applied preferentially to thos |
| 6768849 |
Systems and methods for fabricating varying waveguide optical fiber device |
July 27, 2004 |
| 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 region has a higher viscosity and the core region has a lower viscosity. The relative vis |
| 6768847 |
Dispersion compensating module and fiber for control of residual dispersion |
July 27, 2004 |
| 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 having an inflection point at a wavelength near the optical transmission operating waveleng |
| 6735985 |
Method of impressing a twist on a multimode fiber during drawing |
May 18, 2004 |
| The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth. |
| 6658183 |
Process for fabricating tapered microstructured fiber system and resultant system |
December 2, 2003 |
| The invention involves providing a microstructured fiber having a core region, a cladding region, and one or more axially oriented elements (e.g., capillary air holes) in the cladding region. A portion of the microstructured fiber is then treated, e.g., by heating and stretching the |
| 6654522 |
Process for fabricating tapered microstructured fiber system and resultant system |
November 25, 2003 |
| The invention involves providing a microstructured fiber having a core region, a cladding region, and one or more axially oriented elements (e.g., capillary air holes) in the cladding region. A portion of the microstructured fiber is then treated, e.g., by heating and stretching the |
| 6587625 |
Optical fiber apparatus for high-radiation environments |
July 1, 2003 |
| Applicants have discovered an apparatus and method effective for use in rendering an optical fiber resistant to losses caused by high-radiation environments such as in outerspace. The apparatus comprises an optical fiber, a housing surrounding the optical fiber defining an enclosed space |
| 6542679 |
Method of making an improved multimode optical fiber and fiber made by method |
April 1, 2003 |
| Our method of making high bandwidth silica-based multimode optical fiber comprises provision of a non-circular preform, and drawing fiber of chiral structure from the preform. The non-circular preform can be made by maintaining the inside of the tubular preform under reduced pressure |
| 6513994 |
Testing optical fiber splices |
February 4, 2003 |
| The specification describes a technique for evaluating optical fiber splices. The essence of the technique involves detecting thermal power emanating from the fiber splice as the result of absorption of the light carried by the fiber. The technique is particularly suited for cladding |
| 6434172 |
Article comprising a fiber raman device |
August 13, 2002 |
| The disclosed fiber Raman device comprises means for coupling pump radiation of a first wavelength .lambda..sub.1 and a second wavelength .lambda..sub.2 into a length of silica-based fiber, with .lambda..sub.1 being different from .lambda..sub.2, and with both of .lambda..sub.1 and . |
| 6422043 |
Method of making an improved multimode optical fiber and fiber made by method |
July 23, 2002 |
| Our method of making high bandwidth silica-based multimode optical fiber comprises provision of a non-circular preform, and drawing fiber of chiral structure from the preform. The non-circular preform can be made by maintaining the inside of the tubular preform under reduced pressure |
| 6397636 |
Method of applying a precursor to an assembled fiber bundle and fusing the bundle together |
June 4, 2002 |
| Optical fiber bundles having high optical throughput can be produced with relatively high yield if gaps between fibers are eliminated by application of a particle-containing glass precursor material, exemplarily fumed silica in an aqueous medium. Manufacture of optical fiber bundles that |
| 6389186 |
Optical waveguide lasers and amplifiers with pump power monitors |
May 14, 2002 |
| In accordance with the invention, a pumped waveguide device comprising a pump waveguide and an active waveguide is provided with a pump power monitor by disposing between the pump source and the active waveguide, an indicator waveguide having a core doped with a material sensitive to the |
| 6381045 |
Method and apparatus for bidirectional communication over a single optical fiber |
April 30, 2002 |
| Dual concentric core fiber is used for optical communication. Inbound messages lying in a first wavelength channel are received from a terminal portion of the fiber, and outbound messages lying in a second such channel are injected into the terminal portion. The optical fiber has at leas |
| 6363194 |
Optical fiber communication system employing Nd doped fiber amplifier for the 1400 nm window |
March 26, 2002 |
| In accordance with the invention, an optical fiber communication system comprises one or more Nd doped fiber amplifiers for amplified transmission in the 1400 nm window. The amplifier is designed with a combination of waveguide effects and selective absorption to reduce amplified spontan |
| 5966491 |
Cladding-pumped fiber structure |
October 12, 1999 |
| A cladding-pumped fiber structure, suitable for use as a laser, provides for efficient clad-to-core energy transfer. The outside interface of the pump-clad is constructed from a rod-shaped preform by local melt-displacement using an open flame. |
| 5949941 |
Cladding-pumped fiber structures |
September 7, 1999 |
| A cladding-pumped fiber structure is disclosed in which mode mixing of pump light injected into the fiber is induced by index modulation. In one embodiment, the index modulation is created by a stress-inducing region disposed in the cladding which simultaneously maintains the polarizatio |
| 5937134 |
Cladding pumped fiber lasers |
August 10, 1999 |
| The specification describes fiber laser devices with cores containing aluminum in which the composition of the core is modified to minimize the core .DELTA., thereby allowing a larger core diameter, and a reduction in the fiber laser length by a factor equal to the square of the diameter |
| 5923684 |
Fiber amplifier with multiple pass pumping |
July 13, 1999 |
| An optical fiber amplifier is pumped by a fiber pump laser which has a pair of separate active media within a common resonator. The fiber gain section of the amplifier is also located within the resonator. |
| 5907652 |
Article comprising an air-clad optical fiber |
May 25, 1999 |
| Optical fiber according to the invention comprises a core, with an inner cladding surrounding the core, and an outer cladding surrounding the inner one. The fiber comprises preform-derived glass. The outer cladding comprises a first outer cladding region between the inner cladding region |
| 5873923 |
Method of making a cladding pumped fiber structure |
February 23, 1999 |
| A cladding-pumped fiber structure, suitable for use as a laser, provides for efficient clad-to-core energy transfer. The outside interface of the pump-clad is constructed from a rod-shaped preform by local melt-displacement using an open flame. |
| 5868815 |
Method of making an optical fiber by blowing on a preform tube to enhance collapse |
February 9, 1999 |
| The specification describes a process and apparatus for monitoring and controlling the ellipticity of preform tubes during Modified Chemical Vapor Deposition. In response to computer generated signals from the monitoring device, the tube collapse rate is adjusted dynamically by local |
| 5864644 |
Tapered fiber bundles for coupling light into and out of cladding-pumped fiber devices |
January 26, 1999 |
| In accordance with the invention, light is coupled from a plurality of semiconductor emitters to a cladding-pumped fiber via tapered fiber bundles fusion spliced to the cladding-pumped fiber. Individual semiconductor broad stripe emitters can be coupled to individual multimode fibers |
| 5802236 |
Article comprising a micro-structured optical fiber, and method of making such fiber |
September 1, 1998 |
| Disclosed are non-periodic microstructured optical fibers that guide radiation by index guiding. By appropriate choice of core region and cladding region, the effective refractive index difference .DELTA. between core region and cladding can be made large, typically greater than 5% or |
| 5731892 |
Article comprising hybrid optical fiber amplifier |
March 24, 1998 |
| Multistage Er-doped fiber amplifiers (EDFAs) are disclosed. They comprise a first stage that comprises Er and Al, and further comprise a second stage that comprises Er and a further rare earth element, exemplary Yb. Such multistage EDFAs can have advantageous characteristics e.g., a rela |
| 5708669 |
Article comprising a cladding-pumped optical fiber laser |
January 13, 1998 |
| A cladding pumped optical fiber laser comprises a length of optical fiber having a rare earth-doped region of diameter d.sub.RE >d.sub.01 where d.sub.01 is the mode diameter of the LP.sub.01 mode of the fiber at the laser radiation at wavelength .lambda.. In one embodiment the fiber h |
| 5703978 |
Temperature insensitive long-period fiber grating devices |
December 30, 1997 |
| Applicants have determined that the temperature sensitivity of long-period grating devices is due to differential variation with temperature of the refractive indices of the core and cladding. They have further determined that the cladding profile and fiber composition can be redesigned |
| 5659644 |
Fiber light source with multimode fiber coupler |
August 19, 1997 |
| In an optical fiber light source a section of multimode fiber is interposed between an energizing laser (e.g,, a diode laser) and a single mode fiber active medium. In a preferred embodiment the single mode fiber active medium is surrounded by a multimode cladding coupled to the multimod |
