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7330618 |
Waveguide structure
An improved waveguide structure employing blocks of waveguide core material positioned sufficiently close to a waveguide core thereby eliminating strain effects and its resulting undesirable...
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7327912 |
Wavelength division multiplexer/demultiplexer
Disclosed is a wavelength division multiplexer/demultiplexer having a grating for demultiplexing a multiplexed optical signal, an input waveguide and an output waveguides. The input waveguide...
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7327924 |
Generalized transverse bragg waveguide
According to various embodiments, the present teachings relate to Generalized Transverse Bragg Waveguides (GTBW) that can include an a dielectric core having an index of refraction n 1 and an...
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7327907 |
Optical sensor fiber with protective jacketing layers
Optical fibers, especially those having a core layer, a cladding layer over the core layer, FBG's formed in the core layer, the cladding layer, or both, a buffer layer over the cladding layer, and...
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7327908 |
Integrated optical sensor incorporating sets of diffractive elements
An optical sensor comprises an optical element having diffractive elements and a sensing region. The diffractive elements are collectively arranged to comprise spectral and spatial transformation...
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7324729 |
Optical device
An optical device is made up of a glass substrate, an optical fiber array fixed to an upper portion of the glass substrate, a slit that extends from an upper surface of the optical fiber array into...
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7324714 |
Multicore fiber curvature sensor
An apparatus includes a multicore fiber including three cores. The three cores include two pairs of cores, each pair of cores lying in a plane. The planes of the two pairs of cores are...
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7324725 |
Tunable optical add-drop multiplexer based on SOI wafer and manufacturing method thereof
A tunable optical add-drop multiplexer (OADM) based on an SOI (silicon-on-insulator) wafer is disclosed. The tunable OADM includes a multimode interference region, at least a grating formed on the...
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7319551 |
Maskless optical interferometric lithography
An optical device generated by interferometric lithography, in the form of a surface relief pattern that diffracts light, to be used mainly in optical security, produced by optical systems...
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7317849 |
Optical fiber sensor and method
An optical fiber sensor for detecting curvature of a body/structure comprises a cladding having an outer periphery. A central core receives and transmits light. The central core has Bragg gratings...
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7317852 |
Hitless tunable optical add drop multiplexer with vernier gratings
A set of three gratings may be operated in a vernier loop fashion to select a particular wavelength from a wavelength division multiplexed system. As a result, an optical add/drop multiplexer may...
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7315664 |
Method of identifying and labeling optical conduits
A method for labeling or coding optical conduits is disclosed. The method includes providing an optical conduit, and utilizing reflected light resulting from the transmission of at least one light...
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7310456 |
Multi-core optical fiber pressure sensor
A multi-core optical fiber pressure sensor is described, which sensor includes an optical fiber having at least two cores, wherein the cores have collocated measurement portions, for example...
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7310464 |
Multi-wavelength optical source
A multi-wavelength optical source includes a broadband optical source providing a broadband optical signal, and a modification module optically coupled to the broadband optical source. The...
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7310465 |
Optical pulse time spreading device
The present invention is an SSFBG with which there are few restrictions on the code that can be set and the overall length of which is short. This SSFBG has four unit FBGs the Bragg reflection...
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7309169 |
Single-channel communication device for optical fibre
The field of the invention is that of fiber-optic communication devices known as transceivers, used in the aeronautical field for ensuring that on-board electronic computers can converse with one...
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7310466 |
Photonic crystal waveguides and systems using such waveguides
In general, in one aspect, the invention features a waveguide that includes a core extending along a waveguide axis and a confinement region surrounding the core. The confinement region includes a...
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7310463 |
Optical structural body, its manufacturing method and optical element
A single pulse laser beam of linear polarization is irradiated to a glass region such that the condensing point is located inside of the glass region, thereby to form, at the condensing point, a...
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7308165 |
Optical transducer and method for the simultaneous measurement of pressure and temperature in oil and gas wells
An optical transducer 100, 200 and method for the simultaneous measurement of downhole pressure and temperature in a single- or multi-point configuration including a body 10 a /10 b with an...
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7308162 |
Intrinsic Fabry-Perot optical fiber sensors and their multiplexing
An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. When light is launched into the fiber, two reflections are generated at the two fiber/thin film...
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7308172 |
System for reading data stored on an information carrier
The invention relates to a system for reading data stored on an information carrier. The system comprises a waveguide ( 1203 ) which allows displacing laterally the different components in...
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7308161 |
System and method for wavelength selective switching employing single-element gratings
A wavelength selective switch device is disclosed that includes an elongated signal communication path extending from a first end of the device to a second end of the device. The signal...
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7307804 |
Thermally stabile GRISMs
Thermally stable GRISMs comprise a substrate and cover plate composed of a first material keeps the spatial frequency of the grating stable with temperature, and a prism composed of a second...
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7305155 |
Optical element and wavelength separator using the same
A wavelength separator includes a one-dimensional photonic crystal structure formed by providing a plurality of grooves in parallel with one another at uniform intervals in a homogeneous medium,...
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7305160 |
Tunable wavelength optical transmission module
Disclosed herein is a tunable wavelength optical transmission module, the wavelength of which can be tuned over the wide wavelength region of a C band and which can be implemented at a low price...
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7304797 |
Inputs and outputs for an optical multiplexer/demultiplexer utilizing the grating facet diffraction envelope
The invention relates to a planar waveguide reflective diffraction grating for use in an optical device, such as a wavelength division multiplexer, providing an increased bandwidth over...
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7302128 |
Fiber optic switch
A fiber optic switch uses induced periodic variations in a multi-mode optic fiber, to control power loss in the switch and power output.
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7302189 |
Optical component provided with demultiplexing function and wavelength dispersion compensator
It is an object of the present invention to provide an optical component provided with a demultiplexing function capable of reducing an insertion loss and downsizing, and a wavelength dispersion...
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7302138 |
Arrayed waveguide grating device
The present invention comprises an arrayed waveguide grating member, a taper multimode interference coupler and a taper optical attenuator to uniform and flatten a passband in an optical device.
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7302123 |
Dynamic optical waveguide sensor
Methods and apparatuses that sense physical parameters, such as pressure and strain, using optical waveguide sensors are described. A light source emits light at a predetermined wavelength along an...
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7302139 |
Thermally compensated fiber bragg grating mount
A thermally compensated fiber Bragg grating package is used with a fiber optic sensor. The package includes a Bragg grating mount connected at each end of a sensor mandrel. An optical fiber is...
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7298944 |
Method and device for manufacturing optical fiber grating, optical fiber grating, optical module, and optical communication system
An object of the invention is to improve polarization dependence of insertion loss (PDL) in an ultraviolet light induced optical fiber grating. In the invention, in a method of manufacturing an...
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7298945 |
Polarization splitting grating couplers
A polarization splitting grating coupler (PSGC) connects an optical signal from an optical element, such as a fiber, to an optoelectronic integrated circuit. The PSGC separates a received optical...
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7298937 |
TO-can type optical module
A transistor-outline TO-can type optical module includes a stem, a sub-mount arranged in the stem and a laser diode (LD) is mounted in the sub-mount. A photo diode (PD), which has an inclined light...
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7295732 |
Wavelength selective device
The present invention relates to a device, method, array and use of the device for optical coupling. The device comprises first and second optical waveguides ( 13, 23 ) extending longitudinally...
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7295730 |
Glass package for optical device
A glass optical filter is described that optically connects two optical fibers and may filter a single or group of channels from a WDM signal that is being communicated between the optical fibers....
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7292752 |
Tuneable grating assisted directional optical coupler
A tuneable grating assisted directional optical coupler to couple a transmission signal has a first waveguide including a first core and a first cladding, the first waveguide having a first...
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7292753 |
Dual core corrugated Bragg grating
An apparatus comprising a first core layer having a first thickness and a first refractive index; a second core layer formed on the first core layer, the second core layer having a second thickness...
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7292754 |
Compensating interferometer including delay lines with reduced noise
Methods and apparatus for reducing noise in optical apparatus comprising a delay line by utilizing a plurality of wavelength specific delay lines to delay an input waveform such as a pulse rather...
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7292755 |
Optical resonator formed in a planar optical waveguide with a distributed optical structure
An optical apparatus comprises a planar optical waveguide having at least two reflectors. The planar optical waveguide substantially confines in at least one transverse spatial dimension optical...
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7289700 |
Blazed grating optical fiber polarizing coupler
The blazed grating optical fiber polarizing coupler comprises a first optical fiber with a Bragg diffraction grating formed in its core at substantially the Brewster's angle with respect to an...
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7289699 |
Grating apodization technique for diffused optical waveguides
An optical channel waveguide having a reflection grating and a related method for its fabrication. The grating is apodized to provide a desired reflection or transmission spectral characteristic,...
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7286764 |
Reconfigurable modulator-based optical add-and-drop multiplexer
An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the...
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7286732 |
Distributed optical structures designed by computed interference between simulated optical signals
An optical apparatus comprises a planar optical waveguide and at least one set of diffractive elements formed in or on the waveguide. The waveguide is arranged to confine propagating optical...
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7283705 |
Planar focusing grating coupler
Provided is a planar focusing grating coupler, comprising: a light waveguide including a cladding layer and a core layer formed on a substrate and maintaining incident laser light in a single mode;...
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7283700 |
Optical router using stationary imaging
A planar optical filter consisting of two stages performing stationary imaging between an input waveguide and a set of output waveguides is characterized by reduced crosstalk and minimal loss...
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7283704 |
Optical signal-electric signal converter
An optical signal to electrical signal converter of the present invention comprises an optical waveguide propagating a modulated optical signal therethrough; a pair of electrodes disposed at...
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7283695 |
Optical interconnects in microelectronics based on azimuthally asymmetric long-period fiber grating couplers
Systems and methods, including azimuthally asymmetric fiber gratings are disclosed.
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7283709 |
Integrated microelectromechanical wavelength selective switch and method of making same
A fully integrated microelectromechanical (MEMS) lxK wavelength selective switch (WSS) includes an array of N solid-immersion micromirrors (SIMs) and a K+1 dispersion waveguide arrays that are...
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7283693 |
Method to monitor structural damage occurrence and progression in monolithic composite structures using fibre Bragg grating sensors
A method of monitoring structural damage in a composite structure manufactured by co-curing, co-bonding or secondary bonding of several sub-components ( 7, 8 ), using fibre optic Bragg grating...
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