Patent application number | Description | Published |
20080205839 | Large effective area high SBS threshold optical fiber - Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3+10 log [(1−e | 08-28-2008 |
20080273839 | Connectorized nano-engineered optical fibers and methods of forming same - Connectorized nano-engineered optical fibers and method for forming them are disclosed. The methods include heating a mid-span bare fiber portion of the nano-engineered fiber to collapse the airlines therein so as to form an airline-free portion. The fiber is then inserted into a ferrule channel so that the fiber end protrudes beyond the ferrule end face, but with the airline-free portion positioned at the ferrule end face. The fiber is then cleaved at or near the ferrule end face in the airline-free portion, and the new fiber end face polished to create a solid fiber end face that coincides with the ferrule end face. The methods result in at most only minimal changes to the mode field diameter (MFD) and/or to the outer cladding diameter, which is essential in forming a connectorized nano-engineered fiber that can connect to like-size nano-engineered or non-nano-engineered fibers. | 11-06-2008 |
20080277565 | Optical fiber for optical power transmission - An optical fiber adapted to carry optical power for powering an electrical device and also optionally adapted to carry optical data for signal processing. The optical fiber capable of carrying both optical data and optical power includes a central data waveguide region that carries data light and an annular power waveguide region concentrically surrounding the data waveguide region and adapted to carry relatively large amounts of optical power. A first annular isolation region between the data and power waveguide regions and that includes microstructures serves to optically isolate the waveguide regions. An outer annular isolation region serves to confine power light to the power waveguide region and contributes to the bend-resistance of the optical fiber. An optical power and optical data distribution system that utilizes the optical fiber is also described. | 11-13-2008 |
20080279515 | Optical fiber containing alkali metal oxide - Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K | 11-13-2008 |
20080279516 | Low bend loss coated optical fiber - An optical fiber includes a core and a cladding, said cladding having a refractive index n | 11-13-2008 |
20080279517 | Large effective area fiber - An optical fiber according to an embodiment of the present invention comprises: a glass core extending from a centerline to a radius R | 11-13-2008 |
20080304796 | Connectorized nano-engineered optical fibers and methods of forming same - Connectorized nano-engineered optical fibers and method for forming them are disclosed. The methods include heating a mid-span bare fiber portion of the nano-engineered fiber to substantially collapse the airlines therein so as to form a substantially airline-free portion. The fiber is then inserted into a ferrule channel so that the fiber end protrudes beyond the ferrule end face, but with the substantially airline-free portion positioned at the ferrule end face. The fiber is then cleaved at or near the ferrule end face in the substantially airline-free portion, and the new fiber end face polished to create a solid fiber end face that coincides with the ferrule end face. The methods result in relatively small changes to the mode field diameter (MFD) and/or to the outer cladding diameter. | 12-11-2008 |
20080304800 | Optical fiber with large effective area - An optical fiber comprising: a glass core extending from a centerline to a radius R | 12-11-2008 |
20090003753 | METHOD FOR GENERATING A LINEAR SINGLE POLARIZATION OUTPUT BEAM - A method for generating a linear single-polarization output beam comprises providing an optically active linearly birefringent and linearly dichroic fiber for propagating light and having a single polarization wavelength range and a gain bandwidth; optically pumping the optically active linearly birefringent and linearly dichroic fiber for obtaining fluorescence within the gain bandwidth; and aligning the single-polarization wavelength range to overlap a desired spectral region of the gain profile. | 01-01-2009 |
20090032983 | Method of Making An Optical Fiber - Microstructured optical fiber and method of making. Glass soot is deposited and then consolidated under conditions which are effective to trap a portion of the consolidation gases in the glass to thereby produce a non-periodic array of voids which may then be used to form a void containing cladding region in an optical fiber. Preferred void producing consolidation gases include nitrogen, argon, CO | 02-05-2009 |
20090060435 | Polarization maintaining and single polarization optical fiber - An optical fiber, comprising: (i) a core, (ii) a cladding surrounding the core, (iii) at least one stress member adjacent the fiber core and situated within the cladding, said stress member comprising silica co-doped with B and F. | 03-05-2009 |
20090060436 | Large effective area high SBS threshold optical fiber - Microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber including a core region and a cladding region surrounding the core region, the cladding region including at least one annular region having an index of refraction lower than that of the remainder of the cladding. The optical fiber provides an absolute SBS threshold in dBm greater than about 9.3+10log[(1−e | 03-05-2009 |
20090080843 | Polarization Maintaining And Single Polarization Optical Fiber - An optical fiber, comprising: (i) a core having a core center and a radius or a width a, (ii) a cladding surrounding the core, and (iii) at least one stress member situated proximate to the fiber core within the cladding, said stress member comprising silica co-doped with F and at least one dopant selected from the list consisting of: GeO | 03-26-2009 |
20090148113 | Large Effective Area Optical Fiber - An optical fiber comprising: (i) a glass core ( | 06-11-2009 |
20090154888 | Bend Resistant Multimode Optical Fiber - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index which is spaced from the core at least 0.5 microns and less than 4 microns. | 06-18-2009 |
20090169163 | Bend Resistant Multimode Optical Fiber - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index which is spaced from the core at least 0.5 microns and less than 4 microns. | 07-02-2009 |
20090202211 | Microstructured Transmission Optical Fiber - Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular void-containing region that contains non-periodically disposed voids. The optical fiber provides single mode transmission and low bend loss. | 08-13-2009 |
20090219516 | Fiber Optic Sensing System, Method of Using Such and Sensor Fiber - An embodiment of a sensor fiber includes: at least two fiber sections with a plurality of holes; and at least one other fiber section situated between said at least two fiber sections, wherein the at least one other fiber sections being without the plurality of holes. | 09-03-2009 |
20090274428 | Optical Fiber and a Method of Making - According to one example of the invention an optical fiber comprises: (i) a silica based core, said core having a core diameter greater than 80 μm and a numerical aperture NA≧0.24; and (ii) a silica based cladding in contact with and surrounding the core and having a second index of refraction n | 11-05-2009 |
20100021114 | Double-Clad Optical Fibers And Devices With Double-Clad Optical Fibers - A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 μm, a first index of refraction n | 01-28-2010 |
20100021118 | Double-Clad Optical Fibers and Devices with Double-Clad Optical Fibers - A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 μm, a first index of refraction n | 01-28-2010 |
20100027951 | LOW BEND LOSS SINGLE MODE OPTICAL FIBER - Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R | 02-04-2010 |
20100040336 | Multimode Fiber With At Least Dual Cladding - Multimode optical fiber is disclosed herein having a core surrounded by first and second annular cladding regions. The second annular cladding region has a maximum relative refractive index that is at least 0.05% higher than the minimum relative refractive index of the first annular cladding region. | 02-18-2010 |
20100046899 | Low Bend Loss Single Mode Optical Fiber - Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R | 02-25-2010 |
20100085558 | Detection System and Optical Fiber for Use in Such System - A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation σ, where |σ|≦10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector. | 04-08-2010 |
20100086271 | Ultra Low PMD Fibers and Method of Making - A method for making low PMD fiber comprising the steps of: (i) making an initial fiber preform; (ii) modifying said initial fiber preform to introduce higher birefringence than that of the initial fiber preform into modified preform; and (iii) drawing an optical fiber from the modified preform and bi-directionally spinning the drawn fiber during draw. | 04-08-2010 |
20100124396 | Bend Insensitive Fiber With Reduced Heat Induced Loss - Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular hole-containing region that contains non-periodically disposed holes. The annular hole containing region is doped with at least one dopant selected from fluorine and chlorine. The optical fiber provides low bend loss as well as low heat-induced splice loss. | 05-20-2010 |
20100142890 | +Cylindrical Polarization Beams - Generation of a cylindrically polarized light beam, and in particular, a hybrid-azimuthal-radial polarization beams, called HARP modes, generated from an input linearly polarized Gaussian beam using a spun optical waveguide device is taught. The HARP modes are comprised of hybrid-azimuthal polarization (HAP) and hybrid-radial polarization (HRP) superposition modes. These beams possess a non-zero local angular momentum density that is spatially varying and a zero total angular momentum. | 06-10-2010 |
20100178504 | Bend Insensitive Optical Fibers with Low Refractive Index Glass Rings - An optical fiber includes a silica-based glass portion having an outer diameter of less than about 120 μm. The glass portion comprises a core, an inner cladding and a low index ring. The core comprises an index of refraction n | 07-15-2010 |
20100195194 | Large Mode Area Optical Fiber - A large-mode-area (LMA) optical fiber ( | 08-05-2010 |
20100195966 | Large Effective Area Fiber With GE-Free Core - According to some embodiments an optical waveguide fiber comprises:
| 08-05-2010 |
20100215329 | Large Effective Area Low Attenuation Optical Fiber - Optical waveguide fiber that has large effective area and low loss characteristics, such as low attenuation and low bend loss. The optical waveguide fiber includes a dual trench design wherein an annular region closer to the core is preferably doped with at least one downdopant such as fluorine, which annular region is surrounded by another annular region that preferably includes closed, randomly dispersed voids. | 08-26-2010 |
20100272406 | Bend Resistant Multimode Optical Fiber - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index. | 10-28-2010 |
20100303428 | Bend Resistant Multimode Optical Fiber - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular region, wherein the inner boundary of said depressed index region is an extension of the graded index core, the depressed region having a moat volume greater than 105%-um | 12-02-2010 |
20100310219 | Microstructured Transmission Optical Fiber - A microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber comprising:
| 12-09-2010 |
20110064368 | Low Bend Loss Optical Fiber - An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ | 03-17-2011 |
20110121202 | Optical Fiber Imaging System And Method For Generating Fluorescence Imaging - A nonlinear fluorescence imaging system and method for generating fluorescence imaging includes a pulsed laser source for generating laser pulses at a first wavelength and an optical pulse stretcher including one or more optical pulse stretcher fibers having a first dispersion parameter at the first wavelength. The system also includes a probe for interfacing with a sample to deliver the laser pulses and extract fluorescence signals excited in the sample. One or more optical delivery fibers are included for delivering the laser pulses and collecting nonlinear fluorescence signals. The optical delivery fiber has a second dispersion parameter at the first wavelength which is opposite a polarity of the first dispersion parameter. A detector detects images based on the collected fluorescence signals. | 05-26-2011 |
20110129191 | LARGE EFFECTIVE AREA FIBER - An optical fiber with a glass core extending from a centerline to a radius R | 06-02-2011 |
20110132038 | Soot Pressing for Optical Fiber Overcladding - A method and an apparatus for making an optical fiber preform comprising the steps of (i) depositing a plurality of rods are deposited into an inner cavity of an apparatus; (ii) depositing particulate glass material in the inner cavity between the rods and the inner wall; and (iii) applying pressure against the particulate glass material to pressurize the particulate glass material against the plurality of rods. | 06-09-2011 |
20110205349 | Triple-Clad Optical Fibers and Devices With Triple-Clad Optical Fibers - According to some embodiments the triple-clad optical fiber comprises a core, a first inner cladding, a second inner cladding, and an outer cladding wherein: (i) the core comprises a radius r | 08-25-2011 |
20110211796 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r | 09-01-2011 |
20110265520 | Methods For Determining The Rotational Characteristics Of An Optical Fiber - A method for determining a rotational characteristic of an optical fiber is disclosed. The method includes forming an orientation registration feature in an optical fiber preform and drawing an optical fiber from the preform such that the orientation registration feature formed in the optical fiber preform is imparted to the optical fiber. The optical fiber is then rotated about a longitudinal axis and the direction of rotation is periodically reversed. An orientation signal of the optical fiber is determined based on a position of the orientation registration feature as the optical fiber is rotated. A rotational characteristic of the optical fiber is then determined based on the orientation signal. | 11-03-2011 |
20120106909 | LARGE EFFECTIVE AREA OPTICAL FIBER WITH LOW BEND LOSS - An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ | 05-03-2012 |
20120114292 | MULTI-CORE OPTICAL FIBER RIBBONS AND METHODS FOR MAKING THE SAME - Multi-core optical fiber ribbons and methods for making multi-core optical fiber ribbons are described herein. In one embodiment, a multi-core optical fiber ribbon includes at least two core members formed from silica-based glass and oriented in parallel with one another in a single plane. Adjacent core members have a center-to-center spacing ≧15 microns and a cross-talk between adjacent core members is ≦−25 dB. In this embodiment each core member is single-moded with an index of refraction n | 05-10-2012 |
20120123702 | System and Method for Simultaneously Determining Strain and Temperature Characteristics of an Object - A system for simultaneously determining strain and temperature characteristics of an object comprising: (i) at least one optical fiber having at least two Brillouin peaks; (ii) at least one connector securing the optical fiber to the object to be monitored; (iii) a laser positioned to provide laser light to said at least one optical fiber; (iv) a device measuring frequencies of said at least two Brillouin peaks, and determining frequency shifts of said at least two Brillouin peaks for said at least one optical fiber along the length of fiber; and (v) a system calculating strain and temperature characteristics along said fiber, based on the coefficients of strain and temperature as well as the measured Brillouin frequency shifts for said optical fiber along the length of said optical fiber. | 05-17-2012 |
20120125053 | METHOD OF MANUFACTURING OPTICAL FIBER WITH SELECTED DRAW TENSION - A method of manufacturing an optical fiber includes providing a preform in a furnace, and drawing a plurality of optical fibers from the preform at a plurality of different draw tensions. A bandwidth characteristic of each of the optical fiber is drawn at the different draw tensions is measured. A draw tension setpoint is selected based on the measured bandwidth characteristic of each optical fiber and the draw tension is adjusted to the selected draw tension setpoint. The method further includes drawing from the preform a tuned optical fiber at the selected draw tension setpoint which provides peak bandwidth. | 05-24-2012 |
20120186304 | MICROSTRUCTURED TRANSMISSION OPTICAL FIBER - Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular void-containing region that contains non-periodically disposed voids. The optical fiber provides single mode transmission and low bend loss. | 07-26-2012 |
20120230638 | BEND RESISTANT MULTIMODE OPTICAL FIBER - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a first region having index delta percent Δ | 09-13-2012 |
20120274926 | Distributed Brillouin Sensing Systems and Methods Using Few-Mode Sensing Optical Fiber - A distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift and a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode. | 11-01-2012 |
20120274927 | DISTRIBUTED BRILLOUIN SENSING SYSTEMS AND METHODS USING FEW-MODE SENSING OPTICAL FIBER - Some embodiments of a distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift, a phase matching wavelength between probe and pump light, a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system being able to simultaneously measure temperature and strain and having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode. | 11-01-2012 |
20120275750 | Polarization-Maintaining Optical Fiber With Pure Silica Core - A polarization-maintaining (PM) optical fiber has a pure silica core surrounded by a cladding having a region with randomly arranged voids. Stress members are arranged in the cladding on opposite sides of and in line with the core, and impart birefringence to the PM optical fiber. The PM optical fiber is resistant to aging effects and has a broad single-mode spectral range of 400 nm to 1,600 nm. | 11-01-2012 |
20120294576 | LARGE EFFECTIVE AREA OPTICAL FIBERS - Large effective area optical fibers are disclosed. In one embodiment, an optical fiber includes a glass core and a glass cladding surrounding and in direct contact with the glass core. The glass core may include a radius R | 11-22-2012 |
20130029038 | METHOD OF MAKING A MULTIMODE OPTICAL FIBER - A method of making a multimode optical fiber is disclosed. In one embodiment the method includes calculating a core radius that maximizes the bandwidth of the multimode optical fiber wherein the effect of draw tension is accounted for. The embodiments herein illustrate how core radius can be tuned so the time delay of the outermost guided mode group is reduced. The resultant core radius may be targeted for a value off-nominal from what would be expected for a particular commercial optical fiber type. | 01-31-2013 |
20130039626 | MULTIMODE OPTICAL FIBER AND OPTICAL BACKPLANE USING MULTIMODE OPTICAL FIBER - An optical backplane system is provided. The optical backplane system includes at least one transceiver, at least one optical connector, and a plurality of multimode optical fibers coupled to the at least one optical connector. Each multimode optical fiber includes a graded index glass core having a diameter in the range of 24 microns to 40 microns, a graded index having an alpha less than 2.12 and a maximum relative refractive index in the range between 0.6 percent and 1.9 percent. The optical backplane further includes a cladding surrounding and in contact with the core. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.0 GHz-km at 1310 nm. | 02-14-2013 |
20130044987 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r | 02-21-2013 |
20130047676 | METHOD FOR PRODUCING OPTICAL FIBER HAVING CONTROLLED PERTURBATIONS - A method for producing an optical fiber is provided. The method includes the steps of drawing an optical fiber from a heated glass source in a furnace and introducing index perturbations to the optical fiber via a plurality of perturbation sources arranged at a plurality of different azimuthal locations. The index perturbations are introduced synchronously at different locations along the axial length of the fiber by the plurality of perturbation sources in a generally helical pattern on the outside surface of the fiber in one embodiment. According to another embodiment, the index perturbations are introduced by the plurality of perturbation sources at different frequencies. | 02-28-2013 |
20130051747 | METHOD OF MAKING MULTIMODE OPTICAL FIBERS - A multimode optical fiber is drawn form an optical fiber preform, and during said drawing step, a series of perturbations are imparted to the fiber along the length of the optical fiber, said perturbations exhibiting a non-constant amplitude or repeat period. | 02-28-2013 |
20130071114 | FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING - A few mode optical fiber suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The optical fiber has a graded-index core with a radius R | 03-21-2013 |
20130077926 | MULTIMODE OPTICAL FIBER AND SYSTEM INCORPORATING SUCH - According to some embodiments, a multimode optical fiber comprises a graded index glass core with refractive index Δ1, a maximum refractive index delta Δ1 | 03-28-2013 |
20130114934 | GE-P CO-DOPED MULTIMODE OPTICAL FIBER - According to at least one embodiment a graded index multimode fiber comprises: (i) a silica based core co-doped with GeO | 05-09-2013 |
20130114935 | BEND LOSS RESISTANT MULTI-MODE FIBER - A graded index multimode optical fiber comprising: (a) a silica core doped with germania, and at least one co-dopant, comprising one of P | 05-09-2013 |
20130136405 | LOW BEND LOSS OPTICAL FIBER - One embodiment of a single mode optical fiber includes:
| 05-30-2013 |
20130136406 | LOW BEND LOSS OPTICAL FIBER - An optical fiber comprising: (I) a germania doped central core region having outer radius r | 05-30-2013 |
20130136407 | LOW BEND LOSS OPTICAL FIBER - According to some embodiments a single mode fiber includes:
| 05-30-2013 |
20130136408 | LOW BEND LOSS OPTICAL FIBER - One embodiment of a single mode optical fiber includes:
| 05-30-2013 |
20130182314 | FEW MODE OPTICAL FIBERS FOR Er DOPED AMPLIFIERS, AND AMPLIFIERS USING SUCH - According to some embodiments the optical fiber comprises: (i) a glass core doped with greater than 300 ppm of Er | 07-18-2013 |
20130216176 | SENSING SYSTEMS AND FEW-MODE OPTICAL FIBER FOR USE IN SUCH SYSTEMS - A sensing optical fiber comprising: a few-moded multi-segment core, said core comprising one core segment surrounded by another core segment, and at least one cladding surrounding said core; said core having an F factor (μm | 08-22-2013 |
20130216181 | MODE DELAY MANAGED FEW MODED OPTICAL FIBER LINK - An optical fiber link suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The link has a first optical fiber having a core which supports the propagation and transmission of an optical signal with X LP modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and less than or equal to 20, the first fiber having a positive differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570. The link also has a second optical fiber having a core which supports the propagation and transmission of an optical signal with Y LP modes at a wavelength of 1550 nm, wherein Y is an integer greater than 1 and less than or equal to 20, said optical fiber having a negative differential mode group delay between the LP01 and LP11 modes at a wavelength between 1530-1570. | 08-22-2013 |
20130221238 | Systems For And Methods Of Characterizing The Thickness Profile Of Laminated Glass Structures - Systems for and methods of characterizing the thickness profile of laminated glass structures are disclosed, wherein the laminated glass structure has at least one gradual transition region between adjacent glass layers. The method includes sequentially focusing laser light at different focuses along a line within the laminated glass structure. The sequentially formed focuses define corresponding micro-volumes from which fluorescent light emanates due to a multiphoton process. The variation in the intensity of the detected fluorescent light from each micro-volume as a function of distance into the laminated glass structure is used to determine the relative locations of the multiple layers and the at least one gradual transition region. | 08-29-2013 |
20130229649 | OPTICAL BRILLOUIN SENSING SYSTEMS - According to one embodiment, an optical sensing system may include a gated optical amplifier, one or more triggering devices, and an optical coupler. The gated optical amplifier can receive a pulse signal and transform the pulse signal into an amplified pulse signal having an amplified peak portion. The triggering devices can control the gated optical amplifier such that the gated optical amplifier is in the lossy state while the baseline portion of the pulse signal is transformed and the gated optical amplifier is in the gain state while the peak portion of the pulse signal is transformed. The amplified pulse signal can be transmitted to the sensing optical fiber and a sensed optical signal can be received, when the sensing optical fiber is connected to the optical coupler. Optionally, a second pulse signal and the sensed optical signal can be combined and detected with a coherent balanced detection technique. | 09-05-2013 |
20130243382 | GRADIENT-INDEX MULTIMODE OPTICAL FIBERS FOR OPTICAL FIBER CONNECTORS - A gradient-index multimode optical fiber for use as a stub fiber in an optical fiber connector is disclosed. The fiber is configured to have a minimum group index difference to minimize the adverse effects of multipath interference that can arise in a short, single-mode stub fiber that has a large group index difference. The fiber is also configured to have a mode-field diameter that is substantially the same as that of single-mode optical fibers used as stub fibers. An optical fiber connector that uses the fiber as a stub fiber is also disclosed. | 09-19-2013 |
20130259426 | SINGLE-MODE OPTICAL FIBERS FOR OPTICAL FIBER CONNECTORS - A single-mode optical fiber for use as a stub fiber in an optical fiber connector is disclosed. The optical fiber is configured minimize the adverse effects of multipath interference (MPI) that can arise in a short, single-mode conventional stub fiber that has a large group index difference. The optical fiber is also configured to have a mode-field diameter that is substantially the same as that of single-mode optical fibers intended for use as field fiber in a mechanical splice connector, along with a cutoff wavelength λ | 10-03-2013 |
20130314368 | WAVEGUIDE-BASED TOUCH SYSTEM EMPLOYING INTERFERENCE EFFECTS - A touch system that employs interference effects is disclosed. The touch system includes first and second waveguides that have first and second optical paths that define an optical path difference. The first and second waveguides are configured so that a touch event deforms at least one of the waveguides in a manner that causes the optical path difference to change. The change in the optical path difference is detected by combining the light traveling in the two waveguides to form interfered light. The interfered light is processed to determine the occurrence of a touch event. The time-evolution of the deformation at the touch-event location can also be determined by measuring the interfered light over the duration of the touch event. | 11-28-2013 |
20130322836 | MULTIMODE OPTICAL FIBER AND SYSTEM COMPRISING SUCH FIBER - A multimode optical fiber includes a graded index glass core having a diameter in the range of 41 microns to 80 microns, a graded index having an alpha less than 2.04 and a maximum relative refractive index in the range between 0.6% and 1.8%. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.5 GHz-km at 1310 nm. | 12-05-2013 |
20130322837 | MULTIMODE OPTICAL FIBER AND SYSTEM COMPRISING SUCH FIBER - One exemplary multimode optical fiber includes a graded index glass core having a diameter in the range of 41 microns to 80 microns, a graded index having an alpha less than 2.04 and a maximum relative refractive index in the range between 0.6% and 1.8%. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.5 GHz-km at at least one wavelength between 1200 nm and 1700 nm. | 12-05-2013 |
20140036348 | FEW MODE RARE EARTH DOPED OPTICAL FIBERS FOR OPTICAL AMPLIFIERS, AND AMPLIFIERS USING SUCH FIBERS - According to some embodiments a few moded optical fiber includes a glass core structured to provide light amplification at an amplification wavelength and a cladding surrounding the core. According to some embodiments the core of the few moded optical fiber includes a portion that has an average concentration of rare earth dopant which is lower by at least 30%, and preferably by at least 50%, than the average concentration of the rare earth dopant at another portion of the core that is situated further from the core center. | 02-06-2014 |
20140042306 | TWO-CORE OPTICAL FIBERS FOR DISTRIBUTED FIBER SENSORS AND SYSTEMS - A two-core optical fiber is provided for use in Brillouin distributed fiber sensor applications and systems. The two-core fiber includes a first and second core. Each core is configured to exhibit a Brillouin frequency shift greater than 30 Mhz relative to the other core. Further, each core possesses temperature and strain coefficients that differ from the other core. The cores can be configured to produce Brillouin frequency shift levels of at least 30 Mhz relative to one another. These differences in shift levels may be effected by adjustment of the material compositions, doping concentrations and/or refractive index profiles of each of the cores. These optical fibers may also be used in BOTDR- and BOTDA-based sensor systems and arrangements. | 02-13-2014 |
20140064687 | MULTI-CORE OPTICAL FIBERS WITH SINGLE MODE AND MULTIMODE CORE ELEMENTS - Multi-core optical fibers are disclosed herein. According to one embodiment, a multi-core optical fiber includes a common outer cladding formed from silica-based glass and having a cladding index of refraction n | 03-06-2014 |
20140086577 | MULTIMODE OPTICAL FIBER SYSTEMS WITH ADJUSTABLE CHROMATIC MODAL DISPERSION COMPENSATION - Multimode optical fiber systems with adjustable chromatic modal dispersion compensation are disclosed, wherein the system includes a VCSEL light source and primary and secondary optically coupled multimode optical fibers. Because the VCSEL light source has a wavelength spectrum that radially varies, its use with the primary multimode optical fiber creates chromatic modal dispersion that reduces bandwidth. The compensating multimode optical fiber is designed to have a difference in alpha parameter relative to the primary multimode optical fiber of −0.1≦Δα≦−0.9. This serves to create a modal delay opposite to the chromatic modal dispersion. The compensation is achieved by using a select length of the compensating multimode optical fiber optically coupled to an output end of the primary multimode optical fiber. The compensating multimode optical fiber can be configured to be bend insensitive. | 03-27-2014 |
20140086578 | MULTIMODE OPTICAL FIBER SYSTEMS WITH ADJUSTABLE CHROMATIC MODAL DISPERSION COMPENSATION - Multimode optical fiber systems with adjustable chromatic modal dispersion compensation are disclosed, wherein the system includes a VCSEL light source and primary and secondary optically coupled multimode optical fibers. Because the VCSEL light source has a wavelength spectrum that radially varies, its use with the primary multimode optical fiber creates chromatic modal dispersion that reduces bandwidth. The compensating multimode optical fiber is designed to have a difference in alpha parameter relative to the primary multimode optical fiber of −0.1≦Δα≦−0.9. This serves to create a modal delay opposite to the chromatic modal dispersion. The compensation is achieved by using a select length of the compensating multimode optical fiber optically coupled to an output end of the primary multimode optical fiber. The compensating multimode optical fiber can be configured to be bend insensitive. | 03-27-2014 |
20140119701 | MULTIMODE OPTICAL FIBER AND SYSTEMS COMPRISING SUCH FIBER - A multimode optical fiber includes: (i) a graded index glass core having a radius R | 05-01-2014 |
20140210770 | PRESSURE SENSING TOUCH SYSTEMS AND METHODS - Pressure-sensing touch systems and methods are disclosed for sensing the occurrence of a touch event based on pressure applied at a touch location. The touch system includes a light-source system and a detector system operably adjacent respective input and output edges of a waveguide. Pressure at a touch location on the waveguide gives rise to a touch event causes the waveguide to bend or flex. The waveguide bending causes a change in the optical paths of light traveling by FTIR, causing the light distribution in the output light to change. The changes are detected and are used to determine whether a touch event occurred, as well as the time-evolution of the touch event. The changes in the output light can include polarization changes caused by birefringence induced in the waveguide by the applied pressure applied. Various detector configurations are disclosed for sensing the location and pressure of a touch event. | 07-31-2014 |
20140212102 | POLARIZATION MAINTAINING OPTICAL FIBERS WITH INTRACORE STRESS MECHANISMS - Polarization maintaining optical fibers and methods for making the same are disclosed herein. According to one embodiment, a polarization maintaining optical fiber includes a cladding portion and a core portion disposed in the cladding portion. The core portion includes a first core region having a first coefficient of thermal expansion CTE1 and a second core region having a second coefficient of thermal expansion CTE2. The first coefficient of thermal expansion CTE1 is not equal to the second coefficient of thermal expansion CTE2. At least one of the first core region and the second core region is non-circular symmetric with respect to a centerline of the polarization maintaining optical fiber. | 07-31-2014 |
20140241684 | LOW ATTENUATION OPTICAL FIBERS WITH AN F-GRADED INDEX CORE - An optical fiber is provided that includes a fiber configured to transmit optical data in a plurality of modes or in a single mode; a core region in the fiber that comprises fluorine-doped silica; and a cladding in the fiber that surrounds the core region and that comprises fluorine-doped silica. The core region has a graded refractive index profile with an alpha of about 0.5 to 5. The core of the fiber may be set with a radius of approximately 6 to 50 microns. The cladding may also comprise one or a plurality of layers, including trench or moat regions of a relatively lower refractive index. Still further, an inner cladding may be doped with fluorine at a concentration greater than that in the core region. An outer cladding can comprise silica with fluorine at a concentration below or equal to that in the inner cladding. | 08-28-2014 |
20140268815 | LIGHT-DIFFUSING ELEMENTS - A light-diffusing element with high coupling efficiency to LED sources. The light-diffusing element may be a glass monolith that includes a plurality of internal voids. When light propagating through the monolith encounters the internal voids, it is scattered in a transverse direction and exits the lateral surface of the monolith to provide a broad-area illumination effect. The glass monolith has a diameter of at least 0.7 mm and features a numerical aperture of at least 0.6 to facilitate efficient coupling to LED sources. The internal voids have a cross-sectional dimension that ranges from about 100 nm to several microns and a length that ranges from about 1 μm to a few millimeters. The light-diffusing element can be configured as a rod or as a bent or arbitrarily-shaped fixture. | 09-18-2014 |
20140308015 | LOW DIAMETER OPTICAL FIBER - Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 μm or less, while providing a mode field diameter of 9.0 μm or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 μm or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel. | 10-16-2014 |
20140368809 | MULTI-WAVELENGTH DMD MEASUREMENT APPARATUS AND METHODS - A differential mode delay (DMD) measurement system for an optical fiber is provided. The system includes an optical test fiber with a plurality of modes; a single mode light source that provides a continuous light wave signal to a modulator; and a pulse generator that provides an electrical pulse train signal to the modulator and a triggering signal to a receiver. The modulator is configured to generate a modulated optical test signal through the optical fiber based at least in part on the received light wave and pulse train signals, and the receiver is configured to receive the test signal transmitted through the fiber and evaluate the test signal based at least in part on the triggering signal. The system can be employed to create DMD waveform and centroid charts to obtain minEMBc bandwidth information for a fiber within a wavelength range. | 12-18-2014 |
20150044445 | LASER CONTROLLED ION EXCHANGE PROCESS AND GLASS ARTICLES FORMED THEREFROM - A method for forming ion-exchanged regions in a glass article by contacting an ion source with at least one surface of the glass article, forming a first ion-exchanged region in the glass article by heating a first portion of the glass article with a laser, and forming a second ion-exchanged region in the glass article. Characteristics of the first ion-exchanged region may be different from characteristics of the second ion-exchanged region. A depth of the ion-exchanged region may be greater than 1 μm. A glass article including a first ion-exchanged region, and a second ion-exchanged region having different characteristics from the first ion-exchanged region. The thickness of the glass article is less than or equal to about 0.5 mm. | 02-12-2015 |
20150063754 | UNIVERSAL OPTICAL FIBERS FOR OPTICAL FIBER CONNECTORS - An optical fiber for use as a stub fiber in an optical fiber connector is disclosed. The optical fiber is configured with a segmented core that includes a single-mode segment with a step-index profile and at least one multimode segment having at least one alpha profile. A connector that employs the stub fiber can connect to both a single mode fiber and a multimode fiber. | 03-05-2015 |
20150086161 | OPTICAL FIBER LINK WITH PRIMARY AND COMPENSATING OPTICAL FIBERS - An optical fiber link that utilizes concatenated primary and compensating multimode optical fibers is disclosed. The primary optical fiber has a first relative refractive index profile with a first alpha value α | 03-26-2015 |