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| Number | Title | Issue Date |
| 8107784 | Reduced bend sensitivity and catastrophic bend loss in single mode optical fibers and method of making same An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding re... | 01/31/2012 |
| 8069690 | Apparatus and method for fabricating glass bodies using an aerosol delivery system A method of fabricating a glass body that includes a multiplicity of constituents, at least one of which is a dopant (e.g., a rare-earth element) having a low vapor pressure (LVP) precursor comprises the steps of: (a) generating an aerosol from the LVP precursor; (b... | 12/06/2011 |
| 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 |
| 7916386 | High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers Optical apparatus includes a multimode, gain-producing fiber for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in the core, characterized in that (i) the pump source illustratively co... | 03/29/2011 |
| 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 |
| 7830142 | Tuning fork magnetometer Apparatus comprises a tuning fork having first and second tines, a first magnet disposed on the first tine, and a second magnet disposed on the second tine. In one embodiment the magnets comprise permanent magnets; in another they comprise electromagnets. In a prefe... | 11/09/2010 |
| 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 |
| 7619257 | Devices including graphene layers epitaxially grown on single crystal substrates An electronic device comprises a body including a single crystal region on a major surface of the body. The single crystal region has a hexagonal crystal lattice that is substantially lattice-matched to graphene, and a at least one epitaxial layer of graphene is dis... | 11/17/2009 |
| 7615779 | Forming electrodes to small electronic devices having self-assembled organic layers In one embodiment of the invention, a method of fabricating a SAM device comprises the steps of: (a) providing a substrate having a top surface and a first metal electrode disposed on the top surface, (b) annealing the first metal electrode, (c) forming a SAM layer ... | 11/10/2009 |
| 7457500 | Large-mode-area, multimode, hybrid optical fibers and devices using same A large mode area optical fiber is configured to support multiple transverse modes of signal radiation within its core region. The fiber is a hybrid design that includes at least two axial segments having different characteristics. In a first axial segment the trans... | 11/25/2008 |
| 7421174 | Multi-wavelength, multimode optical fibers A silicate optical fiber comprises a graded index silicate core co-doped with aluminum oxide, phosphorus oxide, germanium oxide and fluorine in unique compositions that we have discovered allow multimode, multi-wavelength operation without significant intermodal dis... | 09/02/2008 |
| 7356233 | Suppression of transverse modes in bandgap microstructure optical fibers An optical fiber comprises core and cladding regions configured to guide the propagation of light (or radiation) in the core region. The cladding region includes a periodic structure configured to produce light guiding by bandgap confinement. In order to suppress hi... | 04/08/2008 |
| 7116472 | Rare-earth-doped optical fiber having core co-doped with fluorine 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 ... | 10/03/2006 |
| 6635924 | Ultra thin body vertical replacement gate MOSFET A method of fabricating a VRG MOSFET includes the steps of: (a) forming a VRG multilayer stack; (b) forming a trench in the stack; (c) depositing an ultra thin, amorphous semiconductor (-semic) layer on the sidewalls of the trench (portions of the ... | 10/21/2003 |
| 6632728 | Increasing the electrical activation of ion-implanted dopants We have found that under certain prescribed conditions a co-implantation process can be effective in increasing the electrical activation of implanted dopant ions. In accordance with one aspect of our invention, a method of making a semiconductor device i... | 10/14/2003 |
| 6530074 | Apparatus for verification of IC mask sets A method of fabricating an IC includes forming a test circuit in/on the wafer to electrically indicate that a correct mask set was used during a revision of the IC design during the manufacturing process. The readout of the circuit enables the manufacture... | 03/04/2003 |
| 6493368 | Lateral injection vertical cavity surface-emitting laser A lateral injection VCSEL comprises upper and lower mirrors forming a cavity resonator, an active region disposed in the resonator, high conductivity upper and lower contact layers located on opposite sides of the active region, upper and lower electrodes... | 12/10/2002 |
| 6489659 | Non-hermetic APD A non-hermetic APD for operation in a moisture-containing ambient comprises an InP/InGaAsP-containing Group III-V compound semiconductor body and a p-n junction formed in the body. Typically the junction intersects a top surface of the body. A patterned d... | 12/03/2002 |
| 6486999 | Using crystalline materials to control the thermo-optic behavior of an optical path The thermo-optic behavior of an optical path over a range of temperatures ƊT is controlled by determining a figure-of-merit (FOM) for the optical path and including in the path a body of crystalline material that enables the conditions specified by the F... | 11/26/2002 |
| 6463088 | Mesa geometry semiconductor light emitter having chalcogenide dielectric coating In a mesa geometry semiconductor laser, a patterned dielectric coating used to define the stripe geometry contact on the top the mesa and to provide significant waveguiding comprises a chalcogenide glass. Applications to intersubband (e.g., quantum cascad... | 10/08/2002 |
| 6403454 | Silicon semiconductor devices with δ-doped layers We have discovered that, contrary to conventional wisdom about forming DP defects, electrical saturation in highly doped 2D layers of Si does not occur. In accordance with one aspect of our invention, free-carrier concentrations in excess of about 7×10 | 06/11/2002 |
| 6400866 | Decoupling of transverse spatial modes in microstructure optical fibers A properly designed MOF can simultaneously exhibit large anomalous dispersion at visible and near infrared wavelengths and support numerous transverse spatial modes that are essentially decoupled from one another, even in the presence of significant pertu... | 06/04/2002 |
| 6393178 | Microstructure optical fibers for dispersion management in optical communication systems A fiber optic system comprises an optical transmitter, an optical receiver, and an optical fiber transmission path that optically couples the transmitter and the receiver to one another. The transmission path includes a first section that has negative dis... | 05/21/2002 |
| 6370219 | Self-modulated, filament-based, solid state laser A self-modulated solid state laser comprises an intracavity optical waveguide that supports a multiplicity of lasing filaments each at a different optical frequency. At least two of the filaments temporally beat with one another so as to modulate the inte... | 04/09/2002 |
| 6358824 | Integrated circuits with tub-ties and shallow trench isolation A method of fabricating an IC comprises the steps of: (a) forming trench isolation regions in a surface of a semiconductor body; and (b) forming a tub-tie region between at least one pair of the trench isolation regions (when viewed in cross-section) by a... | 03/19/2002 |
| 6333944 | Semiconductor laser for operation in librational modes A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive in... | 12/25/2001 |
| 6331908 | Optical system for reduced SBS A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB... | 12/18/2001 |
| 6326646 | Mounting technology for intersubband light emitters A mounting technology that increases the cw operating temperature of intersubband lasers, without increasing the risk of hot spots near the facets and short circuits near the perimeter of the laser chip, is described. In accordance with one embodiment of ... | 12/04/2001 |
| 6324199 | Intersubband light source with separate electron injector and reflector/extractor An intersubband semiconductor light source comprises a core region that includes a unipolar, radiative transition (RT) region having upper and lower energy levels, an injector-only (I) region disposed on one side of the RT region, and a reflector/extracto... | 11/27/2001 |
| 6314122 | Filament-based, optical detection apparatus Optical detection apparatus comprises a solid state laser having an intracavity optical waveguide that supports a lasing filament and operates in one of two states: (1) in a first state, the filament is fixed in one of two orientations, and (2) in a secon... | 11/06/2001 |
| 6301282 | Long wavelength semiconductor lasers incorporating waveguides based on surface plasmons A long wavelength (e.g., mid-IR to far-IR) semiconductor laser comprises an active region and at least one cladding region characterized in that the cladding region includes a light guiding interface between two materials which have dielectric constants o... | 10/09/2001 |
| 6281741 | Integrated circuit including current mirror and dual-function transistor An IC comprises a pair of circuit nodes, a current mirror that includes dual-function transistor, and a controller for switching the transistor between a pair of states. In a first state, the transistor provides current gain and also provides a relatively... | 08/28/2001 |
| 6240114 | Multi-quantum well lasers with selectively doped barriers An MQW laser comprises an active region in which a multiplicity of barriers each includes a doped barrier layer separated from its adjacent quantum well layers by undoped barrier layers. In a preferred embodiment, each barrier of an InGaAsP/InP SCH MQW la... | 05/29/2001 |
| 6233082 | Optical transmitter for WDM systems An optical transmitter for generating any one of N carrier signals for use in an M-channel WDM system (MࣙN), each channel operating at a different carrier wavelength λs (s=1, 2 . . . M), includes an optical source for generating the carrier ... | 05/15/2001 |
| 6208680 | Optical devices having ZNS/CA-MG-fluoride multi-layered mirrors In a multi-layered dielectric mirror the higher refractive index layers comprise ZnS and the lower refractive index layers comprise a composite of approximately 95%MgF2 and 5%CaF2 by mole fraction. In one embodiment, the fluoride lay... | 03/27/2001 |
| 6169756 | Vertical cavity surface-emitting laser with optical guide and current aperture A VCSEL comprises separate current and optical guides that provide unique forms of drive current and transverse mode confinement, respectively. In one embodiment, the optical guide comprises an intracavity high refractive index mesa disposed transverse to... | 01/02/2001 |
| 6166837 | WDM system for reduced SBS A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB... | 12/26/2000 |
| 6162655 | Method of fabricating an expanded beam optical waveguide device A method of fabricating an expanded beam optical waveguide device (e.g., a laser), comprises the steps of (a) forming a first semiconductor waveguide region having first and second sections of different thickness and an intermediate vertical taper section... | 12/19/2000 |
| 6148012 | Multiple wavelength quantum cascade light source A multiple wavelength quantum cascade (QC) superlattice (SL) light source has at least three energy levels in each radiative transition (RT) region, and electron transitions between the levels give rise to emission lines at different wavelengths. In one e... | 11/14/2000 |
| 6134257 | Solid state laser for operation in librational modes A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive in... | 10/17/2000 |
