FURUKAWA ELECTRIC NORTH AMERICA, INC. Patent applications |
Patent application number | Title | Published |
20100127034 | Optical Fiber Cleave Tool - An apparatus and method for cleaving an optical fiber. The method includes supporting a connector in a fixed axial position along an axis of an optical fiber extending from an end of the connector, and placing an axial tension along the axis of the optical fiber. A fiber engaging member is moved along an arcuate path such that a sharpened blade tip of the fiber engaging member cuts across a cut location of the optical fiber. The axial tension induces crack propagation through the thickness of the optical fiber at the cut location. | 05-27-2010 |
20100103959 | Selectively Pumping A Gain-Doped Region Of An Optical Fiber - The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved. | 04-29-2010 |
20100034500 | Sequentially Increasing Effective Area In Higher-Order Mode (HOM) Signal Propagation - Disclosed are multi-stage optical amplifiers that propagate higher-order mode (HOM) signals. One embodiment, among others, comprises a first segment of optical fiber in which a first HOM signal propagates, a second segment of optical fiber in which a second HOM signal propagates, and a mode converter that converts the first HOM signal into the second HOM signal. | 02-11-2010 |
20100027938 | Pumping in a Higher-Order Mode That is Substantially Identical To a Signal Mode - The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved. | 02-04-2010 |
20100008664 | Preventing Dielectric Breakdown In Optical Fibers - When transmitting in higher-order modes (HOMs), the chances of dielectric breakdown in the bulk glass can be reduced by judicious selection of the mode of transmission. Since energy distributions in the HOM profile change with the mode order, one can calculate the peak intensity for any given HOM. Correspondingly, one can calculate whether any portion of the transmitted pulse will exceed the breakdown threshold for the optical fiber through which the HOM signal is being transmitted. Should the calculated energy exceed the dielectric breakdown threshold, another HOM with a lower peak intensity can be selected for signal transmission. Disclosed are systems and methods for selecting an appropriate HOM to reduce the likelihood of dielectric breakdown. | 01-14-2010 |
20100008633 | Segmented Gain-Doping Of An Optical Fiber - The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved. | 01-14-2010 |
20100002997 | Stretcher Fiber and Module - A stretcher fiber includes a core region, inner trench region, ring region, outer trench region, and outer cladding region. The core region has a radius r | 01-07-2010 |
20100002992 | Pumping In A Higher-Order Mode That Is Different From A Signal Mode - The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved. | 01-07-2010 |
20090263083 | APPARATUS FOR SIDE FIRE FIBER LASERS - A fiber laser having at least one pair of reflectors coupled to an optical fiber, the at least one pair of reflectors defining an optical cavity between the at least one pair of reflectors and being configured to reflect light within the optical cavity. At least one light pump is coupled to the optical fiber and configured to provide pump light into the optical cavity, and at least one medium is positioned within the optical cavity and configured to generate signal light from the pump light in the optical cavity. Further, at least one grating positioned within the optical cavity and configured to couple the signal light out of the optical cavity. | 10-22-2009 |
20090202191 | Systems and Techniques for Generating Cylindrical Vector Beams - A technique is described for generating a cylindrically polarized beam, e.g., a radially or azimuthally polarized beam. An input optical fiber is provided that supports signal propagation in a fundamental LP | 08-13-2009 |
20090185771 | Tunable Dispersion Compensator with Minimum Differential Group Delay - In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amount of dispersion. At least one respective DGD element is connected into the respective pathway for each such grating. The set of all such respective DGD elements in a given pathway introduces a bias differential group delay DGD | 07-23-2009 |
20090059352 | METHOD AND ARRANGEMENT FOR MITIGATING BEND DISTORTION IMPACT IN A FIBER AMPLIFIER OR LASER - A method of producing an optical amplifying assembly includes providing an amplifying fiber and selecting a first portion and a second portion of the amplifying fiber such that a bend of substantially the same radius and length would cause greater distortion impairments in the first portion than in the second portion. The method further includes coiling the second portion and arranging the first portion to mitigate the impairments due to bend distortion. | 03-05-2009 |
20090034925 | Optical Fibers and Optical Fiber Devices with Total Dispersion Greater than Material Dispersion - Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP | 02-05-2009 |
20080317419 | OPTICAL FIBERS AND OTICAL FIBER DEVICES WITH TOTAL DISPERSION GREATER THAN MATERIAL DISPERSION - Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP | 12-25-2008 |
20080317415 | Connector Cover For Pulling And Water Resistance - Embodiments of the invention include a connector system. The connector system includes a connector cover. The connector-cover has a cap to protect a connector from dust and water and an adapter attached to an optical fiber cable, which is configured to connect to the cap. The dimensions and configuration of the connector-cover allow it to be pulled through conventional conduit (i.e. a 90°-bent, 0.75 inch Schedule 40 conduit). | 12-25-2008 |
20080285907 | Systems and methods for creating localized refractive index modulations in an optical fiber - A technique is described for creating a localized modulation of an optical fiber's refractive index profile. A segment of optical fiber is loaded into a heating unit having a resistive heating element with a localized heating zone. A selected portion of the fiber segment is positioned within the heating zone, and the heating unit is used to create a refractive index modulation the selected fiber portion. The localized modulation is repeated along the length of the fiber segment to write a fiber grating. Also described is a resistive heating system for performing the described technique. | 11-20-2008 |
20080273855 | Hardened Connector System Including A Translator - Embodiments of the invention include a hardened connector system. The connector system includes a connector plug for terminating an optical fiber, a plug housing for coupling to the optical fiber cable and the connector plug, and a translator for coupling the plug housing and the connector plug to an optical fiber connector adapter. The translator, which couples the plug housing to a jack receptacle portion of the connector adapter is configured to allow the connector to be decoupled from the connector adapter without damaging the connector adapter, e.g., when the connector system is subjected to relatively excessive cable loads. Also, the dimensions and configuration of the plug housing allow it to be pulled through conventional conduit, including a 90′-bent, 0.75 inch Schedule 40 conduit. | 11-06-2008 |
20080219620 | Achieving Gaussian Outputs from Large-Mode-Area-Higher-Order Mode Fibers - A mode conversion technique to convert higher-order-mode into a nearly fundamental Gaussian shape by using a beam expander is developed and is particularly useful in high-power lasers and amplifiers. By using a beam expander between a transmitted fiber and a conventional mode conversion system, the strict lateral tolerance requirement can be overcome with high conversion efficiency. | 09-11-2008 |