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| Number | Title | Issue Date |
| 7348650 | Element having microstructure and manufacturing method thereof A method of manufacturing an element having a microstructure of an excellent grating groove pattern or the like is obtained. This method of manufacturing an element having a microstructure comprises steps of forming a metal layer on a substrate, forming a dot column... | 03/25/2008 |
| 7349598 | Surface plasmon resonance device A surface plasmon resonance device of the present invention includes a transparent medium layer and a conductive layer, a periodic structure being present at the interface therebetween. Assuming that the wavelength of visible light incident on the conductive layer t... | 03/25/2008 |
| 7349612 | Optical element, optical circuit provided with the optical element, and method for producing the optical element An optical element of the present invention includes a structure having at least one convex portion and at least one concave portion formed so as to be adjacent to either one of the convex portions. At least one surface of the structure is covered, and the optical e... | 03/25/2008 |
| 7349628 | MMI based device A device and method for multiplexing or demultiplexing M optical signals, each having a different wavelength λm. An MMI waveguide has a length such that each optical signal that propagates into the MMI waveguide at an i:th access waveguide, where i≦N, ... | 03/25/2008 |
| 7349590 | Polarization modulation interrogation of grating-coupled waveguide sensors An optical interrogation system and a GCW sensor are described herein that are used to determine whether a biological substance (e.g., cell, molecule, protein, drug) is located in a sensing region of the GCW sensor. The optical interrogation system includes a light ... | 03/25/2008 |
| 7346238 | Grating into a high index contrast strip or channel waveguide A high index difference coupler includes a high index difference waveguide having one or more modes. A plurality of gratings is formed on the high index difference waveguide. The effective index difference between low index regions and high index regions of the wave... | 03/18/2008 |
| 7346233 | Single mode (SM) fiber optical reader system and method for interrogating resonant waveguide-grating sensor(s) An optical reader system is described herein which has a single mode (SM) optical fiber launch/receive system that uses one or more SM optical fibers to interrogate a biosensor and does not use multimode (MM) optical fibers to interrogate the biosensor. The use of t... | 03/18/2008 |
| 7344315 | Optical connections and methods of forming optical connections In one embodiment, a fiber assembly is provided. The fiber assembly has a first fiber having at least one core. The core has a length, a first end, and a second end, and light may be transmitted along the core. The second end has an obtusely angled end surface. The ... | 03/18/2008 |
| 7342217 | System for the measurement and data acquisition for optical fiber sensors A system for the measurement and surface data acquisition for optical fiber sensors containing Bragg gratings for the sensing of physical parameters originated from a set of oil wells, the system including: an optical system for signal processing, the signals being ... | 03/11/2008 |
| 7342254 | Light-emitting device having a diffractive film on its light-output face and manufacturing method therefor Affords efficiently and at low cost practical, tiny light-emitting devices having an optically diffractive film on their light-output face. A light-emitting device (LD) includes a diffractive film (DF) formed on its light-output face; the diffractive film includes a... | 03/11/2008 |
| 7343070 | Optical splitter with tapered multimode interference waveguide A 1×2 splitter design having low loss is described. The splitter has a non-adiabatic tapered waveguide (22) connected between a substantially single-mode input waveguide (20) and two output waveguides (24, 26). The non-adiabatic tapered wavegui... | 03/11/2008 |
| 7343071 | Optical component and a method of fabricating an optical component The invention relates to a method of manufacturing an optical component (800). It also relates to a branching unit and to a method of reducing insertion loss in an optical branching unit. It further relates to a method of reducing stress induced polarization ... | 03/11/2008 |
| 7343066 | Reconfigurable optical add/drop multiplexer A reconfigurable optical add/drop multiplexer (ROADM) includes a first optical dynamic gain equalization filter (DGEF) having a first input for receiving an initial wavelength division multiplexed (WDM) signal, a first output for sending a phase shifted WDM signal, ... | 03/11/2008 |
| 7343061 | Integrated photonic amplifier and detector An asymmetric twin waveguide (ATG) structure with an integrated amplifier and detector fabricated in a single active waveguide layer is disclosed. The structure comprises an active waveguide layer formed on a passive waveguide layer. The active and passive waveguide... | 03/11/2008 |
| 7342716 | Multiple cavity low-emissivity coatings Multiple cavity low-emissivity coatings. The coating includes three infrared-reflection film regions, which may each include silver. ... | 03/11/2008 |
| 7343064 | Optical switch and optical add/drop multiplexer To provide a wavelength-selection optical switch able to select a light with a certain wavelength and an optical add/drop multiplexer using the same. An optical switch comprising: a silicon substrate; a glass substrate arranged to face a surface of the silicon subst... | 03/11/2008 |
| 7339669 | Device for the analysis of the qualitative composition of gases A device for the analysis of the qualitative, optionally also the quantitative composition of gases, uses measuring light of known spectral composition that can pass through the gas to be analyzed and the gas can be caused to interact. A detector arrangement is pres... | 03/04/2008 |
| 7339714 | Variable blazed grating based signal processing A light processing system includes an array of optical signal processing devices. The array of processing devices are operable to receive at least some of a first signal part and to modulate the first signal part based at least in part on a control signal received f... | 03/04/2008 |
| 7339717 | Method and system for use in optical code division multiple access A method and device are provided for automatically generating a key and a conjugate key to be used in an optical code division multiple access system. The method comprises applying a down conversion process to pump input light to thereby produce down converted broad... | 03/04/2008 |
| 7339728 | Low-emissivity coatings having high visible transmission and low solar heat gain coefficient Low-emissivity coatings that are highly reflective to infrared radiation. The coating includes three infrared-reflection film regions, which may each include silver. ... | 03/04/2008 |
| 7340187 | Optical signal monitoring method and apparatus In an optical signal monitoring method in wavelength multiplexing and an optical network, an area corresponding to a characteristic pattern of an eye pattern of an optical signal to be monitored, which characterizes a deterioration, is extracted from a database stor... | 03/04/2008 |
| 7340175 | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system Hierarchical hybrid optical networking is based on balancing cost and performance of optical networks by providing transparent (optical) switching of subsets of wavelengths in addition to opaque (electrical) switching of individual light paths. Effective use of wave... | 03/04/2008 |
| 7340139 | Polarization insensitive microbend fiber gratings and devices using the same 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 LP1m mode and the resonant wavelength supported by the odd/even... | 03/04/2008 |
| 7340136 | Multi-wavelength optical fiber The invention features a fiber that includes an optical fiber (110) containing a gain medium having a Raman active material with a Raman gain spectrum. The optical fiber is configured to receive energy at a wavelength λp. The fiber also includes a... | 03/04/2008 |
| 7340132 | Polarization insensitive microbend fiber gratings and devices using the same 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 LP1m mode and the resonant wavelength supported by the odd/even... | 03/04/2008 |
| 7340133 | Configurable dispersion compensation trimmer The invention pertains to optical fiber transmission systems, and is particularly relevant to transmission of large volumes of data over long distances at high rates. An improved apparatus achieving precise dispersion compensation in a fiber span is disclosed. In pa... | 03/04/2008 |
| 7340119 | Optical sensor and system An optical sensor has a core, a cladding, and an over-layer. In some embodiments the optical sensor also has a sensing layer. The over-layer acts as a sensitivity enhancement layer, with a refractive index larger than that of the cladding layers. A periodic structur... | 03/04/2008 |
| 7336899 | Method for determining the dispersion characteristics of minimum phase filters A method and apparatus for determining the dispersion characteristics of minimum phase filters using substantially only an amplitude response of a minimum phase filter under test includes fitting an amplitude spectrum of the minimum phase filter with a substantially... | 02/26/2008 |
| 7336415 | Optical amplification module, optical amplification apparatus, and optical communications system The present invention relates to a practical optical amplification module and the like realizing a wide-band gain spectrum with a small relative gain non-uniformity in L band. Pumping light from a pumping light source is supplied to a Bi type EDF by way of an optica... | 02/26/2008 |
| 7336854 | Optical switch, optical modulator and wavelength variable filter An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB couple... | 02/26/2008 |
| 7336861 | Fiber-optic sensor or modulator using tuning of long period gratings with self-assembled layers The provision of an ionic self-assembled multilayer (ISAM) film on a fiber-optic element including a long period grating (LPG) by a simple, room temperature process provides tuning of the LPG and/or high sensitivity to the refractive index of the ambient environment... | 02/26/2008 |
| 7336872 | Localized annealing of UV induced index grating in optical waveguides A method for producing a Bragg grating in an optical waveguide device such as an optical fiber. The optical fiber is exposed to a UV source through a phase mask and this produces a Bragg grating on the fiber. The grating on the fiber is overexposed such that the gra... | 02/26/2008 |
| 7336855 | Integration of a waveguide self-electrooptic effect device and a vertically coupled interconnect waveguide A self-electrooptic effect device (“SEED”) is integrated with waveguide interconnects through the use of vertical directional couplers. Light initially propagating in the interconnect waveguide is vertically coupled to the active waveguide layer of the SEED and,... | 02/26/2008 |
| 7336862 | Fiber optic sensor for detecting multiple parameters in a harsh environment A fiber optic sensor is provided. The fiber optic sensor includes a fiber core having a plurality of Bragg grating elements wherein, the grating elements comprise a periodic or a quasiperiodic modulated microcrystalline and rigid silicon dioxide tetrahedral structur... | 02/26/2008 |
| 7336868 | Optical component with spectral separation The invention relates to an optical component comprising at least one input monomode fiber (1-4), at least one output monomode fiber (5) and a diffractive element (7) which is disposed between the input fiber or fibers (1-4)... | 02/26/2008 |
| 7336858 | In-fiber optical isolator for high-power operation An in-fiber optical isolator for high-power operation using two kinds of fiber, not including the active fiber where laser gain occurs. A hi-birefringence passive fiber with a tilted Bragg grating is connected to the active fiber at one end with the connection regio... | 02/26/2008 |
| 7331722 | Optical module for housing an optical component An optical module for housing an optical component to which optical fibers are to be connected, the optical module comprises a casing; at least two round fiber guides which are arranged within the casing, spaced at a distant from each other and around which the opti... | 02/19/2008 |
| 7332736 | Article comprising gated field emission structures with centralized nanowires and method for making the same This invention provides novel methods of fabricating novel gated field emission structures that include aligned nanowire electron emitters (individually or in small groups) localized in central regions within gate apertures. It also provides novel devices using nano... | 02/19/2008 |
| 7333689 | Photonic integrated devices having reduced absorption loss An asymmetric twin waveguide (ATG) structure with quantum-well intermixing in the taper region of the active waveguide is disclosed. The structure comprises a first waveguide, a second waveguide, and a taper formed in the second waveguide. The taper has an intermixe... | 02/19/2008 |
| 7333692 | Optical waveguide assembled with an optical subunit having a diffractive element set and an optical component An apparatus comprises an optical transmission element, a diffractive element set formed in or on the transmission element, and an optical component. The diffractive element set is positioned to enable spatial overlap of diffractive elements and an evanescent optica... | 02/19/2008 |
