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7616849 |
Illuminating devices including uniform light distribution, multiple light sources, and multiple types of light sources
An optical device for collecting and distributing light from a quasi point light source which includes a planar light guide having surfaces through which optical axes are periodically spaced. There...
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7606488 |
Wavelength-division-multiplexing optical transmission system and control method thereof
In a wavelength-division-multiplexing optical transmission system in which optical-node apparatuses that perform relay transmission of wavelength-division-multiplexed light are located at specified...
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7599592 |
Polymer fiber polarizers with aligned fibers
A polarizing film is made of multilayer polarizing fibers embedded within a matrix. The fibers are formed with layers of at least a first and a second polymer material. Layers of the first polymer...
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7590327 |
Waveguide and light emitting device having the same
A waveguide based on a three-dimensional photonic crystal is arranged to provide wave-guiding in a single mode and a mode having a field strength distribution with unimodality in a plane...
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7577365 |
Optical pulse regeneration device, installation comprising one such device and use of same
This device for optically regenerating pulses includes a synchronous intensity modulator to provide time synchronization for pulses passing through it and to stabilize intensity fluctuations in the...
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7574089 |
Optofluidic devices and methods of using the same
An optofluidic device is provided. The device includes a cladding region having a first refractive index, and a channel defined by the cladding region such that the cladding region forms an inner...
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7573918 |
Dispersion compensated mode-locked pulsed lasers and optical amplifiers
Techniques, apparatus and systems for providing compensation mechanisms for mode-locked lasers and optical amplifiers and a dispersion compensation mechanism to allow a mode-locked laser and an...
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7554707 |
Method and apparatus for optical processing
An optical logic circuit is disclosed. The optical logic circuit is configured on a substrate of a first material. The optical logic circuit also has an optical layer which overlays the substrate...
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7551822 |
Nonlinear optical signal-treating apparatus
A nonlinear optical signal-treating apparatus can suppress the distortion of pulse light to be inputted into an optical fiber to an allowable level or less. The apparatus comprises a pulse light...
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7551819 |
Multiple-core photonic-bandgap fiber with coupling between the cores
An optical coupler includes a first optical port, a second optical port, a third optical port, and a fourth optical port. The optical coupler further includes a photonic-bandgap fiber having a...
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7551809 |
Optical fiber delivery system for delivering ultrashort optical pulses and optical system including the same
An optical fiber delivery system for delivering ultrashort optical pulses that can efficiently transmit high peak power, ultrashort optical pulses from an optical pulse source to a desired position...
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7551808 |
Optical signal noise suppressor and optical signal noise suppressing method
The present invention provides an optical signal noise suppressor and an optical signal noise suppressing method that can decrease noise components to be superimposed on signal light. The optical...
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7532798 |
Optical waveguide
An elongate waveguide for guiding light including a core having an elongate region of relatively low refractive index; a microstructured region around the core comprising elongate regions of...
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7532384 |
π-Phase shift device for light
A phase shifter includes at least one photonic crystal structure having alternating high and low index dielectric layers. At least two defect structures are positioned between said photonic crystal...
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7526165 |
Optical coupler devices, methods of their production and use
The present invention relates in general to coupling of light from one or more input waveguides to an output waveguide or output section of a waveguide having other physical dimensions and/or...
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7526149 |
Dual wavelength strain-temperature Brillouin sensing system and method
An optical fiber strain-temperature sensing system includes first and second optical sources respectively generating first and second light signals having different wavelengths. Optical circulators...
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7522799 |
All-optical logic gates using nonlinear elements—claim set VI
An all-optical logic gates comprises a nonlinear element such as an optical resonator configured to receive optical input signals, at least one of which is amplitude-modulated to include data. The...
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7519253 |
Broadband or mid-infrared fiber light sources
A broadband light source includes one or more laser diodes that are capable of generating a pump signal having a wavelength shorter than 2.5 microns, a pulse width of at least 100 picoseconds and a...
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7515801 |
Coherent terahertz radiation source
A THz radiation source comprising a dual waveguide heterostructure is provided. The dual waveguide heterostructure includes an optical waveguide contained within a larger THz waveguide layered...
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7505648 |
Device comprising a polarization-independent micro-resonator
Polarization-diverse optical devices and related methods are disclosed. In some embodiments, these devices and methods are realized by utilizing a four-port, wavelength-dependent optical coupler...
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7499207 |
Beam shaping prior to harmonic generation for increased stability of laser beam shaping post harmonic generation with integrated automatic displacement and thermal beam drift compensation
A harmonic generation/beam shaping system to generate a shaped beam having a harmonic relationship with a beam generated by a laser, including a first harmonic generation element and a second...
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7486895 |
Effective control algorithm for optical polarization mode dispersion compensators
The present invention includes apparatus and method of a variable step size dithering control algorithm for polarization mode dispersion controllers (PMDCs). The dithering step size of the PCs is...
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7486849 |
Optical switch
An optical switch, comprising an optical resonator, a first input optical waveguide optically coupled to the optical resonator for guiding a first optical signal to the optical resonator; a second...
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7486432 |
Method for preparing a periodically poled structure
A method for preparing a periodically poled structure according to this aspect of the present invention comprises the steps of providing a ferroelectric substrate and performing a poling process by...
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7483609 |
Image wavelength conversion device, method of manufacturing the device, and image conversion system using the device
An image wavelength conversion device for converting an infrared light image into a visible light, a method of manufacturing the device, and an image conversion system using the device are...
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7483608 |
Method of designing optical pulse shaping device and optical pulse shaping device
The present invention provides a method for designing an optical pulse shaper including a first optical propagation line unit having a nonlinear medium and a dispersion medium concatenated,...
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7480434 |
Low loss terahertz waveguides, and terahertz generation with nonlinear optical systems
A silicon based source for radiation in the 0.5-14 Terahertz regime. This new class of devices will permit continuously tunable, milli-Watt scale, continuous-wave, room temperature operation, a...
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7474827 |
Devices and methods for all-optical processing and storage
Devices and methods for optical processing and storage are described. In a preferred embodiment, an integrated optical gate matrix, that includes a set of nonlinear elements and waveguides...
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7474458 |
Method for preparing a poled structure with inhibition blocks
A method for preparing a poled structure comprises the steps of forming a ferroelectric substrate having a top surface and a bottom surface, performing a doping process to form at least one...
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7474457 |
Generation of radiation with stabilized frequency
Method and device for the generation of a comb of stabilized frequency lines and/or a train of ultrashort laser pulses for stabilization of the position of the carrier wave with respect to the...
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7466229 |
Device for generating plane beam/conical shape beam and security device using generated plane beam/cone beam
Disclosed are an apparatus of converting a laser beam traveling straight to a beam propagated in all directions and a security system using the laser beam propagated in all directions. The laser...
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7460295 |
Periodic poling structure and electrode element and method for preparing the same
A periodic poling structure comprises a ferroelectric substrate including a plurality of tunnels, a plurality of first domains positioned in the ferroelectric substrate between the tunnels and a...
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7457031 |
Optical configurations for wavelength-converted laser sources
An optical package is provided comprising a semiconductor laser, a wavelength conversion device, a lens assembly, and one or more adjustable optical components. The lens assembly and the adjustable...
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7453625 |
Method of producing domain inversion parts and optical devices
A comb electrode 3 is provided on a first main face 2 a and a uniform electrode 4 is provided on a second main face 2 b of a substrate made of a ferroelectric single crystal of a single...
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7446930 |
Method of inverting polarization by controlling defect density or degree of order of lattice points
A problem to be solved is to provide a method of forming domain inverted regions of short period in a ferroelectric single crystal in a controllable time period of application of voltage and an...
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7440161 |
Optical element and method for forming domain inversion regions
There is provided a stable optical element having a fine, uniform, and wide-ranging domain inversion structure in a ferroelectric crystal. This includes a plurality of domain inversions ( 101 )...
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7437083 |
Wavelength converter
A wavelength converter for binary optical signals includes an interferometer structure ( 110 ) for generating an output signal by modulating a received local signal (LS) according to the modulation...
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7436583 |
Optical amplification fiber, optical amplifier module, optical communication system and optical amplifying method
The present invention relates to an optical amplification fiber and others capable of effectively reducing nonlinear interaction between signal channels even in transmission of multiplexed signal...
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7436579 |
Mobile charge induced periodic poling and device
Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of...
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7430351 |
Non-linear femtosecond pulse filter with high contrast
The invention relates to a non-linear optical filter capable of transmitting an electromagnetic pulse with a duration of less than about 1 picosecond, provided with means for generating an...
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7426322 |
Plasmon photocatalysis
Plasmons on a waveguide may deliver energy to photocatalyze a reaction. The waveguide or other energy carrier may be configured to carry electromagnetic energy and generate plasmon energy at one or...
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7426075 |
Wave generation by wave propagation phase-shift compensation in an non-linear optical medium
In a nonlinear optical medium such as the gallium arsenide, two collinear incident monochromatic waves are injected to generate a monochromatic wave. The medium induces between the three waves a...
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7424192 |
Frequency conversion with nonlinear optical polymers and high index contrast waveguides
Systems and methods for manipulating light with high index contrast waveguides clad with substances having that exhibit large nonlinear electro-optic constants χ 2 and χ 3 . Waveguides...
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7424191 |
System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber
A method of simultaneously specifying the wavelength dispersion and nonlinear coefficient of an optical fiber. Pulsed probe light and pulsed pump light are first caused to enter an optical fiber to...
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7421171 |
Efficient terahertz sources by optical rectification in photonic crystals and metamaterials exploiting tailored transverse dispersion relations
A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical...
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7413430 |
Crystal base plate and pressing device
The upper block 12 contacts the bearing block 20 , and the bearing block 20 is coupled to the upper plate 21 . The upper block 12 has a protruding part 22 on the upper surface that is...
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7405820 |
Optical spectrum analyzing device by means of Brillouin scattering and associated measurement process
The invention relates to a device which is used for the spectral analysis of optical signals and which is based on the stimulated Brillouin scattering effect. The invention also relates to the...
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7403688 |
Method and optical fiber device for production of low noise continuum
A waveguide, such as a holey fiber or other optical fiber, is tapered to control the dispersion in a manner which varies along the length of the tapered portion of the fiber, thus providing the...
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7403671 |
Photonic-crystal electromagnetic-wave device including electromagnetic-wave absorptive portion and method for producing the same
A photonic-crystal electromagnetic-wave device includes a photonic crystal structure having a periodically changed optical property at least in one direction. The photonic crystal structure...
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7397975 |
Optical switch
Reflection means such as a mirror are provided on the output end of an optical fiber, and the input signal light and control light are returned to the optical fiber. Although the zero-dispersion...
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