Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7920767 | Suppression of higher-order modes by resonant coupling in bend-compensated optical fibers The effect of bending is anticipated in an optical fiber design, so that resonant coupling remains an effective strategy for suppressing HOMs. The index profile of the fiber and its bend radius are configured so that there is selective resonant coupling of at least ... | 04/05/2011 |
| 7869685 | 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 th... | 01/11/2011 |
| 7865051 | Polarization-dependent hollow-core optical fibers In accordance with one aspect of the invention, the core and cladding regions of a hollow-core optical fiber are configured so that a signal mode is coupled to a cladding mode in order to exploit polarization-dependent properties. In general, the fiber comprises a h... | 01/04/2011 |
| 7865050 | Equalizing modal delay of high order modes in bend insensitive multimode fiber Described are multimode optical fibers in which the differential in the mode delay for higher order modes is reduced for bending insensitive MMF. The result is preservation of low differential mode delay and high bandwidth while low bend loss is achieved. The design... | 01/04/2011 |
| 7865045 | Locally perturbed optical fibers for mode transformers The specification describes optical devices and related methods wherein an input mode is converted by multiple LPG mode transformers to produce an output with multiple predetermined modes. ... | 01/04/2011 |
| 7836728 | Increasing the cladding-to-core ratio (D/d) of low D/d ratio core rods in optical fiber performs An optical fiber preform is fabricated by inserting a number of core body pieces end-to-end inside a glass cylinder, wherein the pieces may have a cladding-to-core diameter (D/d) ratio within the range of one to four. The cylinder with the inserted core body pieces ... | 11/23/2010 |
| 7817892 | Bend insensitive fiber optic drop cable for in-home use A bend insensitive fiber optic cable includes a singlemode fiber, a buffer layer surrounding the fiber wherein a thickest component of the buffer layer has an elastic modulus greater than 515 MPa (75,000 psi), and a jacket surrounding the buffer layer, wherein the j... | 10/19/2010 |
| 7787733 | Optical fiber configuration for dissipating stray light 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... | 08/31/2010 |
| 7783149 | Large-mode-area optical fibers with reduced bend distortion In a LMA optical fiber the index of the core region is graded (i.e., as viewed in a radial cross-section) and has a grading depth of Δng, as measured from a central maximum at or near the axis to a lower level that is not greater than the central maximum... | 08/24/2010 |
| 7748660 | Fiber optic rapid spooling tool A spooling tool for paying out a fiber optic cable prewound on a spool region of a drop box or on an associated spool, when installing a cable at a user's premises. In one embodiment, the tool includes a base plate and a stud projecting from one side of the plate. A... | 07/06/2010 |
| 7722777 | Method of preparing core rods for optical fiber preforms Core rods or other glass components associated with optical fiber preforms are cleaned by loading them into a number of first sleeves, and partially obstructing entrance and exit ends of the sleeves to retain the components. The sleeves are contained inside a second... | 05/25/2010 |
| 7627223 | Storage cabinet for slack fiber optic cabling Apparatus for storing slack fiber optic cabling. A cabinet enclosure has an opening for allowing access to cabling and other components inside the enclosure, and a number of spool tracks are supported inside the enclosure. Each of a number of cable spool assemblies ... | 12/01/2009 |
| 7546018 | Fiber optic cabling for multi-dwelling unit (MDU) and commercial building deployments A network provider cable is routed to a splitter box in a multi-dwelling unit or commercial building where the cable fibers are terminated. One or more riser cables, each terminated at one end at the splitter box, are routed through a building shaft. Each riser cabl... | 06/09/2009 |
| 7522806 | Fiber optic cable distribution box A fiber optic cable distribution box has an interface compartment for interfacing a first set of fibers when routed inside the compartment, with a second set of fibers associated with a fiber optic cable that is routed to the box. A drum region is disposed beneath t... | 04/21/2009 |
| 7400814 | Wall-mountable optical fiber and cable management apparatus Optical fiber and cable management apparatus includes a base for mounting on a wall or other surface at a subscriber premises, and a drum region extending axially upward from the base. The drum region includes an outer cylindrical wall for supporting a length of a f... | 07/15/2008 |
| 7356232 | Optical fibers for high power applications The specification describes optical fiber designs that overcome the problem of self-induced damage to optical fibers due to excessive self-focusing. The refractive index of these fiber designs is grossly non-uniform in the center core of the optical fiber. In one em... | 04/08/2008 |
| 7228029 | Short pulse lasers using large mode area fibers and higher order modes The specification describes an optical fiber device for propagating and recompressing high energy, ultrashort pulses with minimal distortions due to nonlinearity. The device is based on propagation in a higher order mode (HOM) of a few-moded fiber. Coupling into the... | 06/05/2007 |
| 7099542 | Low temperature dry loose tube fiber optic cable A water blocking configuration for a low temperature, dry loose tube fiber optic cable includes one or more flexible buffer tubes each having a passage sized to contain one or more optical fibers. A single yarn is disposed in the passage of each buffer tube, and the... | 08/29/2006 |
| 7031589 | Material for attenuating light signals with low reflectance in a fiber optic network A fiber optic attenuating element is formed of a thermoplastic polymer having (i) a refractive index in the range of between about 1.42 and 1.47 as measured at a temperature of 23° C. and a wavelength of 1550 nm, (ii) a glass transition temperature of at least 105Â... | 04/18/2006 |
| 7021083 | Manufacture of high purity glass tubes A glass tube for use in an optical fiber preform is produced by applying a first soot on an end face of a starting member to form an elongated, porous cylindrical soot core having a first density, and applying a second soot including SiO2 on the periphery... | 04/04/2006 |
| 6654531 | Dispersion-compensating module Disclosed is a dispersion-compensating (DC) module [740] comprising a first length of DC optical fiber [10] in tandem with a second length of a standard singlemode optical fiber. The DC fiber is fabricated from silica glass and has a refractive index prof... | 11/25/2003 |
| 6611646 | Hybrid strength member for an optical cable A hybrid strength member (300) for an optical cable (10) is made from dielectric materials, and provides excellent compressive and tensile properties within a single structure. The strength member includes two concentric layers of filamentary strands that... | 08/26/2003 |
| 6543941 | Jack receptacle having optical and electrical ports An optical cable tracing system is constructed using an optical/electrical (hybrid) cable 10 containing both optical and electrical transmission media. This cable provides desirably high bandwidth via optical fibers 15 while connection accuracy is provide... | 04/08/2003 |
| 6498887 | Dispersion-compensating fiber having a high relative dispersion slope Disclosed is a dispersion-compensating (DC) optical fiber 10 that is designed to support the fundamental mode of radiation at 1550 nm. The DC fiber is fabricated from silica glass and has a refractive index profile that includes a core region 51 surrounde... | 12/24/2002 |
| 6478472 | High-density optical connecting block A high density optical connecting block 100 is mounted in a relatively thin, flat panel 10, and is constructed as an array of identical cells 110 that are linked together as a one-piece unit. The connecting block has a front-to-back depth that is greater ... | 11/12/2002 |
| 6456768 | Optical fiber cable tracing system An optical cable tracing system is constructed using an optical/electrical (hybrid) cable 10 containing both optical and electrical transmission media. This cable provides desirably high bandwidth via optical fibers 15 while connection accuracy is provide... | 09/24/2002 |
| 6443627 | Duplex optical connector A high density optical connecting block 100 is mounted in a relatively thin, flat panel 10, and is constructed as an array of identical cells 110 that are linked together as a one-piece unit. The cells have a front-to-back depth that is greater than ten m... | 09/03/2002 |
| 6400450 | Method of qualifying a multimode optical fiber for bandwidth performance A method is disclosed for qualifying a multimode optical fiber 150 for bandwidth performance when used with a particular laser source. The method combines the modal power distribution (MPD) excited by a particular laser source with the differential mode d... | 06/04/2002 |
| 6317549 | Optical fiber having negative dispersion and low slope in the Erbium amplifier region A optical fiber is disclosed that is suitable for use in a dispersion-compensated, optical communication system that is served by Erbium-doped fiber amplifiers. The fiber has a negative chromatic dispersion that is more negative than -0.8 ps/(nm-km) over ... | 11/13/2001 |
| 6215934 | Coated optical fiber with improved strippability An optical fiber [10] having protective coating materials [14, 15], which surround an elongated strand of glass [12], is designed for improved strippability. Preferably, the optical fiber includes two layers (primary and secondary) of radiation-cured poly... | 04/10/2001 |
| 6205268 | Arrangement of optical fiber segments for minimizing effect of nonlinearities A high-capacity optical fiber network [100, 200] includes wavelength-division multiplexing (WDM) within the 1.4 micron (μm) wavelength region (i.e., 1335-1435 nm). Such a system includes optical fiber [130] whose peak loss in the 1.4 μm region is less t... | 03/20/2001 |
| 6160939 | Optical cable having a filling material with stable viscosity and yield stress An optical cable [100] having one or more optical fibers [11] that are surrounded by an improved filling material [10] is disclosed. The filling material includes one or more synthetic oil(s) that are present in an amount, which is 80 to 95 percent by wei... | 12/12/2000 |
| 6131415 | Method of making a fiber having low loss at 1385 nm by cladding a VAD preform with a D/d<7.5 A singlemode optical fiber 700 having very low loss at 1385 nm, and a practical method for making same are disclosed. A core rod 20 is fabricated using vapor axial deposition to have a deposited cladding/core ratio (D/d) that is less than 7.5. The core ro... | 10/17/2000 |
| 6105396 | Method of making a large MCVD single mode fiber preform by varying internal pressure to control preform straightness A large optical preform 303 is made by a modified chemical vapor deposition (MCVD) process by depositing successive layers of core and cladding materials onto the inside surface of a rotating glass tube 33 having a hydroxyl ion (OH-) level that... | 08/22/2000 |
| 6104856 | Optical air-gap attenuator An optical adapter 100 includes a pair of cylindrical ferrules 121, 122, each containing an optical fiber disposed along its central axis 101--101. The ferrules are aligned with their central axes being collinear. Moreover, the ferrules are captured withi... | 08/15/2000 |
| 6049506 | Optical fiber Sagnac interferometer which identifies harmonically related nulls in the detected spectrum An optical fiber sensing system (20) applies spectral analysis to time-varying disturbances in the output optical power from a Sagnac interferometer. In particular, harmonically related null frequencies in the spectrum (402) of the output optical power fr... | 04/11/2000 |
| 5999290 | Optical add/drop multiplexer having complementary stages An add/drop multiplexer (ADM) 100 includes an optical demultiplexer 200 and an optical multiplexer 300 that are connected in series. The optical multiplexer and the optical demultiplexer each include a number of corresponding passbands, which means that t... | 12/07/1999 |
| 5997358 | Electrical connector having time-delayed signal compensation An electrical connector 60 achieves improved transmission performance by introducing predetermined amounts of compensation between two pairs of conductors that extend from its input terminals to its output terminals along interconnection paths. Electrical... | 12/07/1999 |
| 5926298 | Optical multiplexer/demultiplexer having a broadcast port An optical multiplexer/demultiplexer 500 comprises first and second star couplers 41, 42 that are interconnected by a number of optical waveguides 430 of unequal length (i.e., a grating). The multiplexer/demultiplexer functions to distribute optical signa... | 07/20/1999 |
| 5923805 | Connector for plastic optical fiber An optical connector is disclosed for terminating an optical cable 10 comprising a plastic optical fiber 11 surrounded by a protective jacket 12. The connector includes a housing having an exterior latch 201 that secures it to an adapter 31. The latch is ... | 07/13/1999 |
