| Patent Number |
Title Of Patent |
Date Issued |
| 7352939 |
Polarization insensitive microbend fiber gratings and devices using the same |
April 1, 2008 |
| A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit "splitting" between the resonant wavelengths supported by the TE and TM components of the LP.sub.1m mode and the resonant wavelength supported by the odd/even HE.sub.2m components of the |
| 7340139 |
Polarization insensitive microbend fiber gratings and devices using the same |
March 4, 2008 |
| A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit "splitting" between the resonant wavelengths supported by the TE and TM components of the LP.sub.1m mode and the resonant wavelength supported by the odd/even HE.sub.2m components of the |
| 7340132 |
Polarization insensitive microbend fiber gratings and devices using the same |
March 4, 2008 |
| A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit "splitting" between the resonant wavelengths supported by the TE and TM components of the LP.sub.1m mode and the resonant wavelength supported by the odd/even HE.sub.2m components of the |
| 7272287 |
Optical fiber filter for suppression of amplified spontaneous emission |
September 18, 2007 |
| An in-line, distributed optical fiber filter comprises a core region with a raised refractive index (with respect to the surrounding cladding material) so as to allow for total internal reflection (TIR) of the desired transmission wavelength(s). One or more raised index features are |
| 7271916 |
Characterization of optical fiber using Fourier domain optical coherence tomography |
September 18, 2007 |
| A fiber characterization arrangement utilizes Fourier domain optical coherence tomography (FDOCT) to measure the cross-section of optical fibers, thus providing information sub-surface features, coating thickness/concentricity and stress-induced birefringence under tension. The FDOCT |
| 7266259 |
Optical fiber microcoil, resonant structure and method of making the same |
September 4, 2007 |
| An optical fiber coil of sub-micron diameter is shown to exhibit self-coupling between adjacent turns so as to form a three-dimensional optical resonator of relatively low loss and high Q. As long as the pitch of the coil and propagating wavelength remain on the same order (or less t |
| 7218803 |
Microsphere probe for optical surface microscopy and method of using the same |
May 15, 2007 |
| An apparatus and method for performing surface microscopy of an optical device uses an optical fiber taper including a microsphere endpoint as a near field probe. A transmission fiber is disposed adjacent to the microsphere so as to evanescently couple an optical test signal into the |
| 7212707 |
Temperature-compensated fiber grating packaging arrangement |
May 1, 2007 |
| A passive temperature-compensated optical grating arrangement includes a housing of low CTE material, with the optical grating stretched across the housing between a first, fixed sidewall and a lever arm, the lever arm also being formed of a low CTE material. An expansion element of high |
| 7209615 |
Etched tapered fiber bundle and method of making the same |
April 24, 2007 |
| A tapered fiber bundle is formed by first etching the end portions of each fiber within the group so as to remove a selected amount of outer cladding material from each fiber. The assembled, etched fibers are then fused together in conventional fashion to form a fiber bundle. By first |
| 7177510 |
Polarization insensitive microbend fiber gratings and devices using the same |
February 13, 2007 |
| A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit "splitting" between the resonant wavelengths supported by the TE and TM components of the LP.sub.1m mode and the resonant wavelength supported by the odd/even HE.sub.2m components of the |
| 7171130 |
Optical performance monitor utilizing nonlinear detection |
January 30, 2007 |
| An optical performance monitor particularly well-suited for use in dense wavelength-division multiplexed (DWDM) systems includes both a nonlinear optical detector and a conventional linear detector. The nonlinear optical detector, which may comprise a quadratic detector, is used to p |
| 7171089 |
Enhanced supercontinuum generation in highly nonlinear fibers using post-fabrication processing |
January 30, 2007 |
| Enhancement of the supercontinuum generation performance of a highly-nonlinear optical fiber (HNLF) is accomplished by performing at least one post-processing treatment on the HNLF. Particularly, UV exposure of the HNLF will modify its dispersion and effective area characteristics so |
| 7164833 |
Optical fiber for improved performance in S-, C- and L-bands |
January 16, 2007 |
| An improved optical fiber design has been found to exhibit a relatively low attenuation at the wavelength of 1385 nm (the "water peak"), allowing for Raman amplification to be efficient and effective at wavelengths in the S-band range of 1460 to 1530 nm. An ultra-dry process is used to m |
| 7149429 |
Coarse wavelength division multiplexing system |
December 12, 2006 |
| In a ring network comprising a plurality of nodes and a 16 channel coarse wavelength-division multiplexing (CWDM) plan, a technique is disclosed for adding and dropping channels that reduces the maximum attenuation loss that any channel encounters--thereby enabling longer rings to be |
| 7143611 |
Rod-In-Tube optical fiber preform assembly and method having reduced movement |
December 5, 2006 |
| Embodiments of the invention include an optical fiber preform assembly and a method for making optical fiber using the preform assembly. The assembly includes a preform core rod, at least one overclad tube formed around the preform core rod, a handle attached to one end of the overclad |
| 7139478 |
Nonlinear device comprising a spectrally broadening fiber |
November 21, 2006 |
| Embodiments of the invention include system for monitoring the effectiveness of pulse shaping in a nonlinear optical fiber (40). The spectral content of the pulse, after passing through the nonlinear fiber (40), provides an indication of how effectively the pulse was regenerated. A p |
| 7116874 |
Enhanced supercontinuum generation in highly nonlinear fibers using strong bragg gratings |
October 3, 2006 |
| Enhancement of the supercontinuum generation performance of a highly-nonlinear optical fiber (HNLF) is accomplished by incorporating at least one Bragg grating structure in the HNLF. The Bragg grating results in reflecting a core-guided signal into signal which also remains core-guid |
| 7116472 |
Rare-earth-doped optical fiber having core co-doped with fluorine |
October 3, 2006 |
| A rare-earth-doped optical fiber comprises a silica core region doped with a rare earth element and a cladding region adjacent the core region, characterized in that the core region is also doped with aluminum (Al) and fluorine (F). The presence of small amounts of F are effective to |
| 7087841 |
Communication cable and method of installing same |
August 8, 2006 |
| A communication cable for being used in ducts or tubes comprising an outer jacket (1) which is formed with ribs (4) spaced around the periphery of the jacket and extending along the length of the cable. The new profiled cable has a lower index of friction when being installed in the duct |
| 7082228 |
Multiple order PMD compensator for optical fiber transmission system |
July 25, 2006 |
| In accordance with the invention, an optical fiber transmission system is provided with multiple order PMD compensation to provide enhanced compensation at high bit rates and across a range of frequencies. Specifically, PMD is compensated by a concatenated series of components, each |
| 7081808 |
Self-registration systems and methods for dynamically updating information related to a network |
July 25, 2006 |
| Self-registration systems and methods for dynamically updating information related to a network, are provided. A self-registration system for dynamically updating information related to a network, comprises: a connector comprising an integrated circuit that stores a first block of in |
| 7081323 |
Method of making gratings and phase masks for fiber grating fabrication |
July 25, 2006 |
| In accordance with the invention, the fabrication of a grating phase mask is improved by providing a multiple-scan exposure which can provide an accumulated exposure that is effectively phase modulated or modulated rapidly in amplitude. Applicants have determined that exposure scans can |
| 7072589 |
Method and apparatus for controlling the power level in an optical regenerator |
July 4, 2006 |
| An optical regenerator enabling matching of self-phase modulation induced spectral broadening and optical regenerator filter center wavelengths and bandwidths for different fiber dispersion values. The regenerator monitors the central part of an input signal spectrum at the output of a |
| 7072099 |
Relative intensity noise (RIN) reduction in fiber-based raman amplifier systems |
July 4, 2006 |
| An arrangement for reducing the effects of pump signal relative intensity noise (RIN) in a Raman fiber amplifier. A portion of the output from a pump laser source is applied as an input to a compensating, lower power laser module, where fluctuations in the output power of the pump laser |
| 7057735 |
Method for measuring the optical and physical thickness of optically transparent objects |
June 6, 2006 |
| A method and apparatus for measuring the optical thickness and absolute physical thickness of an optically transparent object utilizes a reflective interferometric process. A broadband optical signal is directed toward the object to be measured, and a pair of signals reflected off of |
| 7037003 |
Systems and methods for reducing splice loss in optical fibers |
May 2, 2006 |
| Techniques are described for reducing splice loss between a pair of optical fibers. A first fiber is spliced to a second fiber at a splice point. A region of the spliced fibers, including the splice point, is thermally treated to cause a controlled diffusion of dopants in the region. |
| 7035525 |
Methods and apparatuses for correcting mechanical twist in optical fiber |
April 25, 2006 |
| Methods and apparatuses negate a measured mechanical twist of an optical fiber by introducing a counteracting twist to bring the net mechanical twist closer to zero, which reduces the fiber's polarization mode dispersion (PMD). A spool of optical fiber having undesirable mechanical t |
| 7021083 |
Manufacture of high purity glass tubes |
April 4, 2006 |
| 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 SiO.sub.2 on the periphery of the soot core to form |
| 7013678 |
Method of fabricating graded-index optical fiber lenses |
March 21, 2006 |
| A GRIN fiber lens is fabricated by the steps of providing a graded index glass preform, thinning the graded index preform to remove a sufficient thickness of the graded glass to establish a desired .DELTA.n, and drawing a graded index optical fiber from the thinned graded index prefo |
| 7010195 |
Fiber optic grating with tunable polarization dependent loss |
March 7, 2006 |
| A tunable polarization dependent loss element is formed of a fiber including a highly tilted optical grating. The grating is formed at an angle of approximately 45.degree. so as to preferentially scatter one polarization state out of the fiber core while allowing the remaining, ortho |
| 7001466 |
Systems and methods for automatic and continuous coating supply during optical fiber production |
February 21, 2006 |
| Systems and methods are disclosed for an automatic and continuous supply of coating material to a coating applicator in optical fiber fabrication. The present invention switches from one coating reservoir to another by way of a transitional period in which both coating reservoirs are |
| 6996317 |
Optical devices including microstructured fiber sections disposed for transverse signal propagat |
February 7, 2006 |
| A microstructured optical component is formed from an optical preform fabricated to include one ore more internal regions of differing refractive index. The preform is drawn into a fiber and sliced into relatively long individual fiber segments, each segment thus forming a microstruc |
| 6990277 |
Enhanced multimode fiber |
January 24, 2006 |
| A perturbed, multimode optical fiber exhibits order-of-magnitude improved capacity attributed to mode mixing--high per-channel bit rate, and large channel number due to large available bandwidth--without the added loss which, in the past, was associated with the perturbation stream. |
| 6990270 |
Fiber amplifier for generating femtosecond pulses in single mode fiber |
January 24, 2006 |
| A source of high-power femtosecond optical pulses comprises a combination of a relatively short rare-earth doped fiber amplifier (e.g., less than five meters) with a first section of single mode fiber (or other dispersive element) disposed at the input of the amplifier to "pre-chirp" |
| 6967767 |
Swept wavelength broadband Raman pump source |
November 22, 2005 |
| A swept wavelength source for broad bandwidth Raman pump applications includes a source of ultrashort (e.g., picosecond) optical pulses. The pulse train output from the source is then applied as an input to a linear dispersive element (such as a section of negative dispersion-shifting |
| 6960028 |
Optical fiber connection utilizing fiber containing ferrules |
November 1, 2005 |
| A ferrule for use in optical fiber connections has an optical fiber containing a bore extending therethrough. Within the bore is a member of shaped memory alloy (SMA) which clamps and affixes the fiber firmly in place within the ferrule without the necessity of cementing the fiber in |
| 6950611 |
In-line polarization monitoring and control in lightwave communication systems |
September 27, 2005 |
| Polarization monitoring and control in a lightwave communication system is achieved by using an in-line polarimeter in conjunction with a polarization controller. The devices are readily compact, accurate and therefore capable of implementation in a variety of system applications. In |
| 6950578 |
Highly index-sensitive optical devices including long period fiber gratings |
September 27, 2005 |
| A long period fiber grating (LPG) device is formed to exhibit a "turn-around-point" (TAP) in a phase matching curve when the group velocities of two propagating modes are matched. When the grating period of the LPG is selected to coincide with the TAP, a large tuning bandwidth is for |
| 6941081 |
Method and apparatus for polarization measurements |
September 6, 2005 |
| A method and apparatus for polarization measurements. A polarization state of an optical signal can be determined using a polarization analyzer comprising a polarization controller, a polarizer, a wavelength dispersive element and a photo-detector. The method and apparatus can be applied |
| 6904210 |
Fiber optic ribbon and method of buffering loss |
June 7, 2005 |
| A fiber optic cable is disclosed that buffers against loss, where the cable includes an outer jacket, and an optical fiber ribbon disposed within the outer jacket, wherein the ribbon includes more than one optical fiber, and at least two distinct matrix coatings disposed on the optical f |
| 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 |
| 6898368 |
Adapter systems for dynamically updating information related to a network and methods for develo |
May 24, 2005 |
| Adapter systems for dynamically updating information related to a network and methods for developing the adapter systems, are provided. An adapter system for dynamically updating information related to the network comprises: an adapter; and an antenna integrated in one of a surface of |
| 6888991 |
Single-mode fiber systems |
May 3, 2005 |
| Single-mode optical fiber systems, incorporating fiber of core radius of sufficient size to support the fundamental mode together with from one to three higher order modes, exhibit performance/cost advantages relative to systems based on traditional single-mode fiber. |
| 6865327 |
Method of making optical fiber with reduced E-band and L-band loss peaks |
March 8, 2005 |
| Applicants have discovered the existence of loss peaks in optical fiber transmission systems using wavelengths in the E-band and the L-band. Specifically, they have discovered the existence of narrow loss peaks at 1440 nm, 1583 nm and 1614 nm. Because the peaks are relatively narrow, |
| 6865320 |
Optical taps formed using fiber gratings |
March 8, 2005 |
| A matched pair of tilted gratings may be formed in a section of optical fiber (or waveguide) and used as a "tap" to measure the power of an optical signal passing through the fiber. By using a pair of highly-tilted gratings (e.g., tilted at an angle of 45.degree. with respect to the |
| 6859596 |
Systems and methods for forming ultra-low PMD optical fiber using amplitude and frequency keyed |
February 22, 2005 |
| A system and method is disclosed for manufacturing single mode optical fiber which incorporates a spin in the molten fiber during manufacturing. The introduction of spin minimizes a form of distortion called polarization mode dispersion (PMD) and varying the spin, i.e. changing its c |
| 6847763 |
Colorless tunable dispersion compensator |
January 25, 2005 |
| A colorless tunable dispersion compensator (TDC) comprises a plurality of N separate dispersion compensation elements, each centered at a different wavelength used in the communication system. A single tuning element is coupled to the plurality of separate dispersion compensation element |
| 6840687 |
Systems and methods for low-loss splicing of optical fibers |
January 11, 2005 |
| Techniques and systems are described for reducing splice loss in an optical fiber transmission line. One described technique includes splicing together at a splice point a first fiber having a first modefield diameter to a second fiber having a second modefield diameter larger than the f |
| 6839484 |
Optical fiber for single-mode operation |
January 4, 2005 |
| A single-mode fiber of increased core size consists of a "few-mode" fiber, of core size sufficient for guiding up to three high-order modes in addition to the fundamental mode, by interposing perturbations of such spacing along the fiber, as to selectively couple any such high-order |
| 6839481 |
High-capacity multimode optical fiber systems |
January 4, 2005 |
| Multimode optical fiber local area networks, both intrabuilding and interbuilding, are optimized to take advantage of the wide wavelength operating range offered by co-pending patent application Ser. No. 10/408,076 "Enhanced Multimode Fiber" --a fiber provided both with: longitudinal |
