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7203399 |
Optical fiber and fiber grating type filter including the same
The present invention relates to an optical fiber having a structure which allows further improvements to be made both in terms of lower reflectance and narrower bandwidth, and to a fiber grating...
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7203398 |
Compact DMD-based optical module
An optical module having an integral optical waveguide with waveguide ports at each end. The optical waveguide receives an input light beam through a first waveguide port. The input light beam...
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7200301 |
Multi-channel grating design technique
A method of improving a grating design function describing a refractive index variation defining a multi-channel grating structure in a waveguide material, the improvement being a reduced maximum...
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7200292 |
Optical fiber inclinometer
An optical fiber inclinometer comprises a pair of fiber Bragg grating devices, a fixed base, a connection plate, and a rotatable base. One end of the connection plate is fixed to the fixed base,...
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7200630 |
Inverse fourier transform method, phase characterization method of optical components from transmission and group delay measurements as well as a system for performing the method
A new method for characterizing the amplitude and phase distributions of the light propagating through arrayed-waveguide gratings is presented. The new method is based on the IFT. A very good...
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7197209 |
Optical distribution system for sensors
A single fiber optic cable is configured as a multiplexer/demultiplexer that allows wavelengths to exit the fiber along its length and feed an optical sensor network in a cost efficient and space...
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7197246 |
Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexer
The first present invention provides an optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmissions of optical signals. Each...
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7197208 |
Wavelength tunable light sources and methods of operating the same
Wavelength tunable light sources and methods of operating the same are described. In one aspect, a wavelength tunable light source includes a resonant light path, an optical gain medium, an optical...
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7194165 |
Arrayed waveguide grating and optical communication system using arrayed waveguide grating
An arrayed waveguide element having flat optical frequency characteristics, and an optical communication system using such arrayed waveguide element are realized by providing the arrayed waveguide...
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7194158 |
Method for producing light-scattering structures on flat optical waveguides
A method for producing light-scattering structures on flat optical waveguides into which light can be coupled for making the light-scattering structures visible. The light-scattering structures are...
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RE39525 |
Reconfigurable optical add and drop modules with servo control and dynamic spectral power management capabilities
This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral...
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7194164 |
Distributed optical structures with improved diffraction efficiency and/or improved optical coupling
An optical apparatus comprises a planar optical waveguide having at least one set of diffractive elements and confining in at least one transverse spatial dimension optical signals propagating...
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7194162 |
Filter response optimization for an arrayed waveguide grating device by adjusting grating optical path length at nanometer scale
A method of optimizing a filter response of an arrayed waveguide grating is disclosed. The method includes the step of measuring a respective phase error of a plurality of waveguide cores of the...
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7194163 |
Multi-layered structure characterization
A method and an apparatus ( 10 ) for characterising a multi-layered structure ( 28 ) during formation of said multi-layered structure are disclosed. The method includes the steps of measuring the...
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7194166 |
Use of waveguide grating couplers in an optical mux/demux system
A group of waveguide grating couplers is disposed on a semiconductor substrate. The grating couplers are all within a spot illuminated on the substrate by a light from an optical fiber. The light...
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7194176 |
Functional optical devices and methods for producing them
A functional optical device has cores which are trenches, different portions of the cores being formed from different core materials. The optical device can be formed by forming trenches 5,7,9 ...
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7194161 |
Wavelength-conserving grating router for intermediate wavelength density
A wavelength router to be used for fiber optical networking router is based on a diffraction grating which utilizes only N wavelengths to interconnect N inputs to N outputs. The basic approach is...
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7190856 |
Reconfigurable optical add-drop multiplexer incorporating sets of diffractive elements
A reconfigurable add-drop multiplexer (R-OADM) comprises an array of channel waveguides coupling two groups of diffractive element sets on a slab waveguide. The channel waveguides include...
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7190858 |
Optical time delay apparatus incorporating diffractive element sets
An optical time delay apparatus comprises: a multi-wavelength optical source; a diffractive element set imparting a wavelength-dependent delay on signals routed from the source to a 1×N optical...
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RE39515 |
Reconfigurable optical add-drop multiplexers employing polarization diversity
This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral...
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7190859 |
Distributed optical structures in a planar waveguide coupling in-plane and out-of-plane optical signals
A slab optical waveguide confines in one transverse dimension optical signals propagating in two dimensions therein, and has a set of diffractive elements collectively arranged so as to exhibit...
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7187816 |
In-fiber whitelight interferometry using long-period fiber grating
An optical fiber sensor is provided for displacement measurement, pressure measurement, refractive index measurement, bio/chemical detection, and/or microscopy.
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7187820 |
Optical time delay system
Optical systems utilizing pixellated switchable elements to provide interaction between at least two White Cells.
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7184616 |
Method and apparatus for fiber Bragg grating production
Fiber Bragg writing devices comprising solid state lasers are provided. The solid state lasers comprise optical parametric oscillators and emit moderate peak-power output beams at wavelengths which...
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7184628 |
Method of manufacturing an optical module with diffraction grating
An optical module comprising a column-shaped mounting member having a through hole extending along the central axis thereof and having a mounting surface formed by incising a part of the mounting...
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7184627 |
Optical waveguide grating coupler incorporating reflective optical elements and anti-reflection elements
An optical wavelength grating coupler incorporating one or more distributed Bragg reflectors (DBR) or other reflective elements to enhance the coupling efficiency thereof. The grating coupler has a...
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7184615 |
Electrically tunable diffractive grating element
The invention relates to an optical device ( 50 ) for manipulating a light wave (λ) using a diffractive grating structure (G). According to the basic idea behind the invention a prior art type...
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7182528 |
Diffractive grating member and optical communication module
The present invention relates to a diffractive grating member and to an optical communication module. The optical communication module includes a semiconductor laser; a coupling optical system for...
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7181096 |
Light waveguide and fluorescent sensor using the light waveguide
A light waveguide includes: a light introducing portion for introducing light coming from a light source into a waveguide main body; a light radiating surface for radiating the light introduced...
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7181108 |
Method and optical system for coupling light into a waveguide
A method and optical system for coupling light from an incoming light wave (WI) into a waveguiding substrate (S) arranges the light wave (WI) to interact with a diffractive in-coupling grating...
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7181107 |
Integrated optics coupling element comprising a grating created in a cladding and its fabrication method
The invention relates to an integrated optics coupling element that includes a substrate, an optical guide core, an optical cladding independent of the core and surrounding at least one portion of...
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7181103 |
Optical interconnect structures incorporating sets of diffractive elements
An optical apparatus comprises an optical interconnect structure defining one or more optical source and receiver ports and one or more interconnect optical signal pathways connecting corresponding...
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7181106 |
Optical fiber capped at end with diffractive film, and manufacturing method therefor
Affords efficiently and at low cost optical fibers capped at the end with a working, tiny optically diffractive film. An optical fiber includes a diffractive film formed onto an endface thereof, or...
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7177501 |
Optical chromatic dispersion compensation module
An optical chromatic dispersion compensation module consists of a portion of fiber ( 10 ) comprising a variable pitch Bragg grating and a mechanical structure ( 1 ) consisting of two flexible...
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7177502 |
Heating optical devices
A thermo-optical device may use a heater to tune an optical device such as an optical switch, a Mach-Zehnder interferometer, or a variable optical attenuator, to mention a few examples. In some...
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7177499 |
Athermal package for fiber bragg gratings with compensation for non-linear thermal response
An athermal package for fiber photonic devices includes three portions of at least three materials, each having a coefficient of thermal expansion that is different from the other two. In contrast,...
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7177500 |
Symbology for encoding energy stream
An optical coding protocol includes a first information channel having a first information bit slot and a first control bit slot, and a second information channel having a second information bit...
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7174061 |
Extensometer comprising a flexible sensing element and Bragg gratings
Extensometer with flexible test specimen and Bragg gratings applied in particular to the monitoring of concrete structures, is configured to measure deformations of a host material and comprises at...
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7174098 |
Apparatus and method for monitoring optical signal
This invention provides a technique for realizing low-cost optical signal waveform monitoring with improved realtimeness to be applied to signal quality monitoring in an actual optical transmission...
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7174070 |
Ultrahigh-frequency light source using dual-wavelength laser with 3-dB beam splitter and method of manufacturing the same
A light source has a structure in which a 3-dB beam splitter is integrated with a Febry-Perot laser diode having a cleaved plane. A first waveguide grating and a first refractive index modifier...
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7174077 |
Fiber coupled laser diodes with even illumination pattern
An optical fiber for evenly illuminating a target. The optical fiber is coupled to a laser emitting diode and receives laser light. The laser light travels through the fiber optic and exits at an...
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7174069 |
All optical multiplexer
A multiplexed optical communication system includes a plurality of chopping modulators associated with a first plurality of channels to receive input optical pulses having a first width and to...
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7174071 |
Arrayed waveguide grating with increased uniformity of a performance parameter
An arrayed waveguide grating (AWG) device comprising a substrate having a first array of waveguides optically coupled between first and second slab couplers and a second array of input-output...
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H002180 |
Coiled optical Bragg radiating aperture system
Disclosed is an optical beam steering system having a plurality of optical apertures arranged in a circle. Each of the optical apertures corresponds to a unique angular sector of the circle and...
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7171093 |
Method for preparing an optical fibre, optical fibre and use of such
Methods for coating an optical fiber with optical fiber Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, are employed to avoid ingress of gases, vapors or fluids in...
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7171078 |
Method and apparatus for fabricating fiber Bragg gratings
A method for fabricating fiber Bragg gratings including: scanning a photosensitive optical fiber with ultraviolet laser light in a longitudinal direction of the optical fiber by means of a phase...
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7171079 |
Tunable dispersion compensator for an optical transmission system
Provided is a tunable dispersion compensator based on an optical fiber grating for use in an optical transmission system. A tunable dispersion compensator comprises: a disk; a ring surrounding the...
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7171068 |
Method to improve an extinction ratio of an optical device
A method to improve an extinction ratio of an optical device, the method includes positioning at least a majority of a plurality of micro-mirrors in an off-state position. A mirror assembly...
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7171080 |
Coupling grating for focusing light within a waveguide for heat assisted magnetic recording
A method and apparatus for focusing light within a waveguide is provided. The waveguide includes a curved grating adapted to focus light incident thereon to a focused spot proximate a first end of...
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7170600 |
Spectrometer using diffraction grating
A spectrometer using a diffraction grating includes a light-incident portion including an incident-side optical waveguide emitting a light beam that includes a plurality of wavelength components...
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