Optical Frequency Converter Patents (Class 359/326)
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Publication number: 20140218788Abstract: A high power pump ultra bright low-noise source is configured with a multimode (“MM”) seed source outputting a MM smooth, low-noise signal light at a desired wavelength in a wavelength range between about 974 and 1030 nm, a MM Yb fiber wavelength converter operative to convert emission of a plurality of high power (“HP”) semiconductor laser diodes at a sub-pump wavelength ? sp to a pump output at the desired wavelength ??, wherein ??=????sp<0/1?sp. The Yb-doped MM wavelength converter is configured with noise levels substantially identical to those of the low-noise signal light, brightness (“B”) substantially equal to ?×B, wherein n is a number HP semiconductor laser diodes, and B is brightness of each HP laser diode, and output power (“Po”) substantially equal to nPd, wherein Pd is a power of each HP laser diode, and n is the number thereof.Type: ApplicationFiled: August 18, 2011Publication date: August 7, 2014Applicant: IPG PHOTONICS CORPORATIONInventors: Valentin Gapontsev, Igor Samartsev
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Publication number: 20140218789Abstract: A source of femtosecond optical pulses comprises a seed pulse source arranged to generate seed pulses; an optical amplifier downstream of the seed pulse source, the optical amplifier having a gain bandwidth; a nonlinear optical element downstream of the amplifier, the optical element spectrally broadening optical pulses via a non linear process to have a spectral bandwidth that exceeds the gain bandwidth of the optical amplifier; and a pulse compressor downstream of the nonlinear optical element and arranged to reduce the temporal duration of optical pulses so as to provide output optical pulses having a femtoseconds time duration.Type: ApplicationFiled: April 10, 2014Publication date: August 7, 2014Applicant: Fianium Ltd.Inventors: John Redvers Clowes, Anatoly Borisovich Grudinin, Pascal Dupriez
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Patent number: 8797639Abstract: A method and an apparatus for processing an optical signal are disclosed wherein an input optical signal having an amplitude profile is combined by means of Bragg scattering with a first pulsed pump signal having a first waveshape and a second pulsed pump signal having a second waveshape. The combined optical signal is input in a nonlinear optical material for frequency converting the input optical signal thereby obtaining an idler signal wherein the first pulsed pump signal co-propagates with the input optical signal and the second pulsed pump signal co-propagates with the idler signal. The idler signal produced has a peak amplitude proportional to the peak amplitude of the input optical signal and a shape corresponding to the second pump waveshape.Type: GrantFiled: December 19, 2011Date of Patent: August 5, 2014Assignee: Alcatel LucentInventor: Colin McKinstrie
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Patent number: 8792156Abstract: An illumination system is disclosed for providing dual-excitation wavelength illumination for non-linear optical microscopy and micro-spectroscopy. The illumination system includes a laser system, an optical splitting means, a frequency shifting system, and a picosecond amplifier system. The laser system includes a laser for providing a first train of pulses at a center optical frequency ?1. The optical splitting means divides the first train of pulses at the center optical frequency ?1 into two trains of pulses. The frequency shifting system shifts the optical frequency of one of the two trains of pulses to provide a frequency shifted train of pulses. The picosecond amplifier system amplifies the frequency shifted train of pulses to provide an amplified frequency-shifted train of pulses having a pulse duration of at least 0.5 picoseconds.Type: GrantFiled: January 17, 2012Date of Patent: July 29, 2014Assignees: President and Fellows of Harvard College, The Arizona Board of Regents on Behalf of the University of ArizonaInventors: Khanh Kieu, Nasser Peyghambarian, Xiaoliang Sunney Xie, Christian W. Freudiger, Dan Fu
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Publication number: 20140204457Abstract: The present invention relates to quinolinium-derived single crystals for use in nonlinear optics, which exhibit high molecular orientation and macroscopic optical nonlinearity. When the quinolinium-derived crystals according to the present invention are applied to THz wave light sources, higher THz wave generating efficiency may be obtained as compared with inorganic crystals or existing organic M crystals.Type: ApplicationFiled: February 28, 2014Publication date: July 24, 2014Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventor: O-Pil KWON
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Publication number: 20140204456Abstract: An IR supercontinuum source for generating supercontinuum in the MIR or possibly LWIR spectral bands comprises a supercontinuum fiber formed from a heavy metal oxide host glass having low optical loss and high non-linearity over the spectral band that is stable, strong and chemically durable. The supercontinuum fiber is suitably a depressed inner clad fiber configured to support only single transverse spatial mode propagation of the pump signal and supercontinuum. The source suitably includes a tapered depressed inner clad fiber to couple the pump signal into the supercontinuum fiber. The source may be configured as an “all-fiber” source.Type: ApplicationFiled: May 6, 2013Publication date: July 24, 2014Inventor: NP Photonics, Inc.
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Patent number: 8780438Abstract: A wavelength conversion element includes: a plurality of phosphor particles; a first matrix located among a part of the plurality of phosphor particles and formed of zinc oxide in a c-axis orientation; and a second matrix located among a remaining part of the plurality of phosphor particles and formed of a material having a refractive index that is lower than a refractive index of the zinc oxide.Type: GrantFiled: November 14, 2013Date of Patent: July 15, 2014Assignee: Panasonic CorporationInventors: Takahiro Hamada, Nobuyasu Suzuki, Kenji Orita, Nobuaki Nagao
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Publication number: 20140191131Abstract: Excitation light of two wavelengths is incident to an optical crystal from a first face side, and a terahertz wave THzb is generated from a second face, and the excitation light that has passed through the optical crystal is reflected, made incident to the optical crystal from the second face side, and a terahertz wave THza is generated from the first face. Terahertz waves with similar characteristics to each other are thereby generated reliably in plural directions.Type: ApplicationFiled: January 3, 2014Publication date: July 10, 2014Applicant: ARKRAY, INC.Inventors: Hirohisa Uchida, Naoto Shichi
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Publication number: 20140185130Abstract: A method of despeckling light that includes mixing high-speckle far-red laser light with low-speckle green laser light in amounts selected to achieve a desired color point in a digital image. The far-red laser light may be red laser diodes with wavelengths in the range of 640 to 680 nm. The green laser light may include stimulated-Raman-scattering light from an optical fiber. The desired color point may be DCI red or Rec. 709 red.Type: ApplicationFiled: December 12, 2013Publication date: July 3, 2014Applicant: Laser Light Engines, Inc.Inventors: John Arntsen, Barret Lippey
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Publication number: 20140177033Abstract: The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform.Type: ApplicationFiled: October 28, 2013Publication date: June 26, 2014Applicant: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Young-Chul NOH, Woojin SHIN, Bong-Ahn YU, Yeung Lak LEE, Changsoo JUNG
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Publication number: 20140175267Abstract: Techniques for producing an arbitrary broadband waveform include storing a first waveform in a circulating coherent storage device. A next waveform is generated. A shifted replica is generated by shifting, by a frequency shift one of the next waveform or the waveform in the storage device. A combined waveform is stored by coherently combining the shifted replica and one of the next waveform or the waveform in the storage device which waveform is not frequency shifted. An apparatus includes a source of a carrier frequency waveform, and a modulator configured to impose the next waveform on the carrier frequency waveform. The apparatus also includes a circulating coherent storage device configured to store a coherent interaction between multiple waveforms. The apparatus also includes a frequency shifter configured to generate a shifted replica by shifting, by a frequency shift, one of the next waveform or a waveform in the storage device.Type: ApplicationFiled: June 10, 2012Publication date: June 26, 2014Applicants: MONTANA STATE UNIVERSITY, S2 CORPORATIONInventors: Charles W. Thiel, Peter B. Sellin, Kristian D. Merkel
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Patent number: 8760752Abstract: An optical device comprising a tunable optical frequency comb generator. The comb generator includes an interferometer, and an optical feed-back loop waveguide.Type: GrantFiled: March 8, 2011Date of Patent: June 24, 2014Assignee: Alcatel LucentInventors: Long L. Chen, Christopher R. Doerr, Nicolas Dupuis
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Patent number: 8746398Abstract: An acoustic material can be electromagnetically tuned to produce alterations in its acoustical properties without physical contact. The acoustic material should contain a periodic structure and a medium that has acousto-elastical properties that can be altered through the application of electromagnetic radiation. Changes in volumetric properties such as density result in changes to the velocity at which sound passes through the material. The acoustic material can be a phononic crystal that undergoes a change in its acoustic bandgap after being subjected to electromagnetic radiation. This electromagnetic tuning ability results in the ability to change the acoustic properties of various phononic devices without physical contact.Type: GrantFiled: May 2, 2012Date of Patent: June 10, 2014Assignee: University of North TexasInventors: Arup Neogi, Ezekiel Walker
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Patent number: 8749874Abstract: An optical integration circuit includes a semiconductor optical amplifier (SOA), a readout mechanism coupled to the SOA, and an optical filter coupled to an output of the SOA. The SOA has a decaying response function and an input for receiving an optical input signal having a first wavelength. The SOA is configured to output an optical signal representing a temporal integration of the optical input signal. The readout mechanism provides an optical readout signal having a second wavelength to the SOA for measuring a state of the SOA. The optical filter is configured to receive the signal representing the temporal integration of the optical input signal and block optical signals having the first wavelength.Type: GrantFiled: March 10, 2010Date of Patent: June 10, 2014Assignees: Lockheed Martin Corporation, The Trustees of Princeton UniversityInventors: David Rosenbluth, Paul R. Prucnal, Konstantin Kravtsov
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Patent number: 8743453Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.Type: GrantFiled: September 26, 2012Date of Patent: June 3, 2014Assignee: Deep Photonics CorporationInventors: Theodore Alekel, David A. Dutton, David H. Foster, Joseph G. LaChapelle, Michael J. Munroe
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Patent number: 8730563Abstract: The present invention relates to a potassium chloroborate nonlinear optical crystal, a preparation method and a use thereof. The crystal has a chemical formula of K3B6O10Cl, has no symmetric center, belongs to rhombohedral crystal system, has a space group R3m with unit cell parameters of a=10.0624(14) ?, b=10.0624(14) ?, c=8.8361(18) ?, Z=3 and V=774.8(2) ?3. It has a powder second harmonic generation efficiency of about 3 times that of KDP (KH2PO4), and a Mohs hardness of 4-5, a transparent wavelength range of 165 nm-3460 nm. The compound is synthesized by a solid-state reaction and the crystal is grown by using a flux, which are of easy operation and low costs. The obtained crystal has large size, short growing period, little inclusion, relatively high mechanical hardness, and is easy to be cut, polished and stored. Said crystal is used to generate a second, third, fourth or fifth harmonic light output for a laser beam with a wavelength of 1064 nm.Type: GrantFiled: January 12, 2011Date of Patent: May 20, 2014Assignee: The Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of SciencesInventors: Shilie Pan, Hongping Wu, Xueling Hou
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Patent number: 8731404Abstract: An optical transmission system is provided. The optical transmission system includes a user side optical repeater device (ORD), a central office side ORD, and wavelength multiplexing and wavelength de-multiplexing functions (MUX/DEMUX). The user side optical repeater device (ORD) is to be connected with a user side optical network unit (ONU), transmits data in two ways, and is used for wavelength division multiplexing (WDM). The central office side ORD is to be connected with a central office side optical line terminal (OLT), transmits data in two ways, and is used for WDM. The wavelength multiplexing and a wavelength de-multiplexing functions (MUX/DEMUX), are used for relaying between the user side ORD and the central office side ORD.Type: GrantFiled: November 30, 2012Date of Patent: May 20, 2014Assignee: Furukawa Electric Co., Ltd.Inventor: Masayuki Miura
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Patent number: 8730567Abstract: A terahertz continuous wave generator includes: an optical intensity modulator configured to modulate an optical signal into DSB optical signals; a local oscillator configured to generate a modulation signal for modulating the optical signal inputted to the optical intensity modulator into DSB optical signals; a notch filter configured to filter an optical signal with a specific frequency; an optical fiber amplifier configured to amplify an output signal of the optical intensity modulator; an optical circulator configured to transmit the optical signal inputted to the optical fiber amplifier to the notch filter and transmit the optical signal reflected from the notch filter to an input of the optical intensity modulator; an optical coupler configured to apply the optical signal to the optical intensity modulator; and an OE converter configured to photomix the DSB signals outputted through the notch filter.Type: GrantFiled: November 8, 2011Date of Patent: May 20, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Sungil Kim, Kwang-Yong Kang, Dong Suk Jun
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Patent number: 8730564Abstract: A nonlinear optical crystal having a chemical formula of YiLajAlkB16O48, where 2.8?i?3.2, 0.8?j?1.2, i and j sum to about four, and k is about 12 is provided. The nonlinear optical crystal is useful for nonlinear optical applications including frequency conversion. Nonlinear optical crystals in a specific embodiment are characterized by UV blocking materials (e.g., some transition metals and lanthanides) at concentrations of less than 1,000 parts per million, providing high transmittance over portions of the UV spectrum (e.g., 175-360 nm).Type: GrantFiled: September 7, 2012Date of Patent: May 20, 2014Assignee: Deep Photonics CorporationInventor: Theodore Alekel
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Patent number: 8730565Abstract: A device for irradiating an electromagnetic wave irradiates an electromagnetic wave having a target frequency in a range of 0.1 THz to 30 THz to the outside of a non-linear optical crystal. The device includes a main body composed of a non-linear optical crystal and a sub wavelength grating structure formed on a surface of the main body. The sub wavelength grating structure includes column shaped bodies regularly arranged on a surface of the main body. Each of the column shaped bodies includes a constant width part having a constant width and a base part provided from the surface toward the constant width part. A surface of the base part has a shape of an arc having a center of curvature in the outside of the base part viewed in a cross section of the column shaped body cut along a direction in which the column shaped bodies are arranged.Type: GrantFiled: September 9, 2013Date of Patent: May 20, 2014Assignee: NGK Insulators, Ltd.Inventors: Jungo Kondo, Yuichi Iwata, Tetsuya Ejiri
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Publication number: 20140133011Abstract: A microscope which makes possible a spectrally-flexible excitation and detection of fluorescence in an economical manner. For this purpose, means for frequency conversion are arranged in the common beam path and a filter for excitation light is arranged in addition to the main beam splitter in the detection beam path. The frequency conversion achieves a spectral delimitation between illumination light, which is emitted by the light source, and excitation light which brings about fluorescence excitation in the specimen. Because the frequency conversion takes place in the common beam path after the main beam splitter, it is possible for both a spatial separation of illumination light, and excitation light and fluorescent light (detection light) emitted by the specimen, to be carried out in an economical manner at the main beamsplitter according to spectral bands because of the spectral difference between illumination light and excitation light.Type: ApplicationFiled: July 5, 2012Publication date: May 15, 2014Inventors: Daniel Schwedt, Ralf Wolleschensky
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Patent number: 8724213Abstract: A High-power sum frequency generator system including a first electromagnetic source for generating a first fundamental field and a second fundamental field emitted along a propagation path, and a first nonlinear component and a second nonlinear component arranged in series along the propagation path. The first nonlinear component generates a first sum frequency field from the first fundamental field and the second fundamental field, the first sum frequency field having a first polarization. The second nonlinear component generates a second sum frequency field from the first and second fundamental fields, the second sum frequency field having a second polarization. The system has an output that includes the first sum frequency field and the second sum frequency field, and a direction of the first polarization forms a mutual angle with a direction of the second polarization such that the two polarizations are non-parallel.Type: GrantFiled: October 14, 2010Date of Patent: May 13, 2014Assignee: Advalight ApsInventors: Morten Thorhauge, Jesper Liltorp Mortensen, Jesper Rubech Rasmussen
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Patent number: 8724214Abstract: An optical upconverting nanomaterial includes a nanocrystal, a ligand layer directly bonded to the nanocrystal, and an optical antenna directly or indirectly bonded to the nanocrystal. The nanocrystal includes a transition metal-doped material exhibiting upconversion to optical wavelengths. The transition metal-doped material includes energy transfer facilitating transition metal dopants and (not necessarily distinct) emitter transition metal dopants, where an absorption spectrum of the energy transfer facilitating transition metal dopants overlaps with an emission spectrum of the optical antenna. The optical upconverting nanomaterial has at least one linear dimension (e.g., width or thickness) that is less than 150 nm in extent.Type: GrantFiled: September 7, 2012Date of Patent: May 13, 2014Assignee: Voxtel, Inc.Inventors: David M. Schut, Charles G. Dupuy, George M. Williams, Thomas L. Allen
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Publication number: 20140128743Abstract: An imaging system is provided that includes a pulsed light source providing pulsed light and is applicable to both microscopes and endoscopes. One or more optical elements with certain dispersive properties are positioned to receive the pulsed light and apply selective dispersive properties to shift the focal plane according to the user and to produce two photon (2p) wide field uniform illumination and 2p wide field structured illumination for the purpose of improving the optical axial resolution and rejection of background signal. An imaging element receives the signal arising from the 2p wide field uniform illumination and 2p wide field structured illumination and produces a respective 3D resolved image of a sample.Type: ApplicationFiled: April 2, 2012Publication date: May 8, 2014Applicants: MASSACHUSETTS INSTITUTE OF TECHNOLOGY, NANYANG TECHNOLOGICAL UNIVERSITY, NATIONAL UNIVERSITY OF SINGAPOREInventors: Yan Seng Elijah Yew, Heejin Choi, Vijay Raj Singh, Daekeun Kim, Jagath Rajapakse, Hanry Yu, Colin J.R. Sheppard, Peter T.C. So
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Patent number: 8717665Abstract: The invention relates to an optical wavelength conversion device adapted to receive at least one first pump beam (?1) as an input and emitting a different wavelength output beam (?S), which includes: an optical cavity (CE); an optically non-linear medium (CNL) placed inside the optical cavity; and a control system (BA1) for controlling said optical cavity having the wavelength of the first pump beam; said control system being adapted to receive, as an input, a first signal (S1) representing the power stored in the cavity having said first wavelength and a second signal (S2) representing the power of the output beam. The invention also relates to a coherent light source comprising such a device and one or two pump laser sources (L1, L2).Type: GrantFiled: June 2, 2009Date of Patent: May 6, 2014Assignee: Centre National de la Recherche ScientifiqueInventors: Fabrice Alain Pierre Gerbier, Emmanuel Simon Mimoun, Jean Dalibard, Jean-Jacques Zondy
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Patent number: 8704447Abstract: In a light source device for combining light waves with at least three wavelengths and outputting thus combined light waves, an optical system element and an electrical system element are formed on a semiconductor substrate, thereby eliminating the necessity of optical members such as an optical connector, and saving space to place the optical members as well as reducing arrangement spacing. In addition, the space necessary for wiring in an electrical circuit is reduced. Therefore, an integration degree of each of the elements, the optical system element and the electrical system element, is enhanced. The optical system element and the electrical system element are formed in layers on the same conductor substrate, thereby reducing the area that is required in configuring a parallel establishment of the optical system element and the electrical system element.Type: GrantFiled: November 28, 2011Date of Patent: April 22, 2014Assignee: Citizen Holdings Co., Ltd.Inventors: Masafumi Ide, Toru Takizawa
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Patent number: 8705165Abstract: An optical wavelength conversion element includes: a wavelength conversion waveguide that has a periodic polarization reversal structure having alternately and cyclically formed domains of which polarization directions are inverted, that guides light as a fundamental wave corresponding to the periodic polarization reversal structure, and performs a wavelength conversion of the guided fundamental wave; a first clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains; a second clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains such that the second clad is opposed to the first clad film; a first conducting unit that electrically connects the domains in parallel via the first clad; and a second conducting unit that electrically connects the domains in parallel via the second clad.Type: GrantFiled: September 17, 2009Date of Patent: April 22, 2014Assignee: Mitsubishi Electric CorporationInventors: Yosuke Akino, Yoshihito Hirano, Takayuki Yanagisawa, Shuhei Yamamoto, Tsutomu Nagatsuka, Toshiyuki Ando
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Patent number: 8698399Abstract: A method of sustaining a plasma, by focusing a first wavelength of electromagnetic radiation into a gas within a volume, where the first wavelength is substantially absorbed by a first species of the gas and delivers energy into a first region of a plasma having a first size and a first temperature. A second wavelength of electromagnetic radiation is focused into the first region of the plasma, where the second wavelength is different than the first wavelength and is substantially absorbed by a second species of the gas and delivers energy into a second region of the plasma region within the first region of the plasma having a second size that is smaller than the first size and a second temperature that is greater than the first temperature.Type: GrantFiled: February 12, 2010Date of Patent: April 15, 2014Assignee: KLA-Tencor CorporationInventors: Ilya V. Bezel, Anatoly Shchemelinin, Eugene Shifrin, Matthew W. Derstine, Richard W. Solarz
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Patent number: 8699124Abstract: A method of optimizing parametric gain in a nonlinear optical crystal that in response to application of a pump beam generates through a parametric generation process signal and idler beams, wherein the signal beam is non-collinear with the pump beam and the signal beam is subject to absorption due to the nonlinear material, the method involving shaping the pump beam to have an elliptical cross section, wherein the method further involves determining the width w of the pump beam depending on the absorption co-efficient of the optical crystal.Type: GrantFiled: June 16, 2011Date of Patent: April 15, 2014Assignee: University Court of The University of St AndrewsInventors: Malcolm Harry Dunn, Cameron Francis Rae, David James Mark Stothard, David Alan Walsh
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Patent number: 8699123Abstract: A wavelength conversion laser light source 100 has: a laser light source configured to generate fundamental wave laser light; and a wavelength conversion element 101 provided with a periodic polarization reversal structure configured to convert the fundamental wave laser light which is incident onto the periodic polarization reversal structure into different laser light in wavelength wherein the wavelength conversion element includes different polarization reversal regions in period; and a polarization reversal axis 102 of at least one of the polarization reversal regions is inclined with respect to an incident optical path of the fundamental wave laser light on the wavelength conversion element.Type: GrantFiled: October 19, 2010Date of Patent: April 15, 2014Assignee: Panasonic CorporationInventors: Koichi Kusukame, Tetsuro Mizushima, Nobuyuki Horikawa, Hiroyuki Furuya, Tomoya Sugita, Shinichi Kadowaki
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Patent number: 8686331Abstract: The present invention is directed to a laser system in which a current laser wavefront performance of the laser system may be monitored. Further, the laser system embodiments disclosed herein may be configured for correcting the laser wavefront internally via correction system(s) within the laser system. Still further, the correction system(s) disclosed herein may provide a long lifetime of performance and may be configured for having a minimal impact on photocontamination.Type: GrantFiled: July 29, 2011Date of Patent: April 1, 2014Assignee: KLA-Tencor CorporationInventor: J. Joseph Armstrong
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Publication number: 20140085710Abstract: A wavelength conversion element includes a core formed of a ferroelectric crystal having a periodically poled structure in which first and second domains having mutually inverted directions of spontaneous polarization are alternately aligned side by side, and a cladding covering all side surfaces of the core along a light propagation direction and having a uniform refractive index. Boundary surfaces of the first and second domains are arranged in a non-parallel manner with respect to the light propagation direction.Type: ApplicationFiled: July 18, 2013Publication date: March 27, 2014Inventor: Tadashi KISHIMOTO
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Publication number: 20140071517Abstract: An optical upconverting nanomaterial includes a nanocrystal, a ligand layer directly bonded to the nanocrystal, and an optical antenna directly or indirectly bonded to the nanocrystal. The nanocrystal includes a transition metal-doped material exhibiting upconversion to optical wavelengths. The transition metal-doped material includes energy transfer facilitating transition metal dopants and (not necessarily distinct) emitter transition metal dopants, where an absorption spectrum of the energy transfer facilitating transition metal dopants overlaps with an emission spectrum of the optical antenna. The optical upconverting nanomaterial has at least one linear dimension (e.g., width or thickness) that is less than 150 nm in extent.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Inventors: David M. Schut, Charles G. Dupuy, George M. Williams, Thomas L. Allen
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Patent number: 8669121Abstract: A method for forming a ferroelectric spontaneous polarization reversal in a desired region of a ferroelectric substrate includes the steps of forming, for the desired region of the surface of the ferroelectric substrate, an electrode pattern or a mask pattern composed of aggregates of micropatterns, and then applying a given voltage into the desired region. The configuration of the micropatterns can be a stripe-shaped pattern, an ellipse-shaped pattern, a hexagon-shaped pattern, a network pattern, or a double cross shaped pattern. The method can further include the steps of generating many nucleuses by using the electrode pattern or the mask pattern composed of the aggregates of micropatterns, forming another electrode pattern or another mask pattern corresponding to the desired region, and then applying a given voltage into the desired region to generate a ferroelectric spontaneous polarization reversal around the nucleuses.Type: GrantFiled: April 22, 2011Date of Patent: March 11, 2014Assignees: Sumitomo Osaka Cement Co., Ltd., National Institute for Materials ScienceInventors: Futoshi Yamamoto, Junichiro Ichikawa, Satoshi Oikawa, Sunao Kurimura, Kenji Kitamura
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Publication number: 20140063591Abstract: Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light—an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions.Type: ApplicationFiled: March 14, 2013Publication date: March 6, 2014Applicant: LOCKHEED MARTIN CORPORATIONInventor: LOCKHEED MARTIN CORPORATION
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Publication number: 20140043673Abstract: An optical frequency conversion method and device are provided by which a component other than a desired harmonic component can be eliminated with high precision and an output lightwave with the desired frequency component can be easily extracted even if the frequency of a modulation signal is changed.Type: ApplicationFiled: April 23, 2012Publication date: February 13, 2014Applicant: NEC CORPORATIONInventor: Shinsuke Fujisawa
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Patent number: 8642984Abstract: According to the present invention, an electromagnetic wave emission device includes a nonlinear crystal having an optical waveguide; and a prism including an electromagnetic wave input surface and an electromagnetic wave transmission surface. The electromagnetic wave transmission surface includes a rotation surface which is a trajectory of a tilted line segment rotated about a central axis of the electromagnetic wave input surface, the tilted line segment being tilted with respect to the central axis. The tilted line segment and the central axis are on the same plane. The central axis is in parallel to an extending direction of the optical waveguide. The central axis passes through a projection of the optical waveguide into the electromagnetic wave input surface.Type: GrantFiled: April 15, 2013Date of Patent: February 4, 2014Assignee: Advantest CorporationInventors: Kazunori Shiota, Akiyoshi Irisawa
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Patent number: 8642983Abstract: An electromagnetic wave emission device includes a nonlinear crystal, a prism, and a cylindrical lens. The nonlinear crystal has an optical waveguide, receives exciting light having at least two wavelength components, and outputs an electromagnetic wave having a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] by means of the Cherenkov phase matching. The prism includes an electromagnetic wave input surface receiving the electromagnetic wave from the optical waveguide and an electromagnetic wave transmission surface through which the electromagnetic wave which has entered from the electromagnetic wave input surface passes. The cylindrical lens has two bottom surfaces opposed to each other, a flat surface intersecting with the two bottom surfaces, and a curved surface intersecting with the two bottom surfaces and the flat surface, wherein the flat surface is in contact with the electromagnetic wave transmission surface.Type: GrantFiled: September 11, 2012Date of Patent: February 4, 2014Assignee: Advantest CorporationInventor: Kazunori Shiota
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Patent number: 8643940Abstract: A system for generating polychromatic light, which includes: an optical pumping device suitable for continuously or quasi-continuously emitting a monochromatic or quasi-monochromatic radiation according to a pumping wavelength; a device for guiding light arranged such as to emit polychromatic radiation continuously or quasi continuously, at the output thereof, and a device for coupling between the pumping and coupling device. In the system, the guiding device, includes a microstructured optical fiber in which the core is at least partially doped with a material having a high intrinsic non-linear response, and the geometry of the optical fiber and the doping rate of the core thereof are predetermined such as to adapt the zero dispersion length of the optical fiber to the pumping wavelength.Type: GrantFiled: October 20, 2010Date of Patent: February 4, 2014Assignee: Centre National de la Recherche Scientifique—CNRSInventors: Alexandre Kudlinski, Arnaud Mussot, Geraud Pierre Bouwmans, Gilles Rene Melin
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Publication number: 20140029299Abstract: Disclosed are an optical member, a display device having the same and a method of fabricating the same. The optical member includes a host; a plurality of light conversion particles dispersed in the host to convert a wavelength of light generated from a light source; and a protective layer surrounding the host and including plastic.Type: ApplicationFiled: November 30, 2011Publication date: January 30, 2014Applicant: LG INNOTEK CO., LTD.Inventors: Soon Young Hyun, June Roh, Kyung Jin Kim, Jae Hong Lee, Ja Ram Kim
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Publication number: 20140029239Abstract: Disclosed are an optical member and a display device including the same. The optical member includes a wavelength conversion layer to convert a wavelength of an incident light, and an impact absorbing layer on the wavelength conversion layer.Type: ApplicationFiled: November 30, 2011Publication date: January 30, 2014Applicant: LG INNOTEK CO., LTD.Inventor: Jeong Taek Oh
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Publication number: 20140016183Abstract: Disclosed are systems and methods for characterizing a nonlinear propagation environment by numerically propagating a measured output waveform resulting from a known input waveform. The numerical propagation reconstructs the input waveform, and in the process, the nonlinear environment is characterized. In certain embodiments, knowledge of the characterized nonlinear environment facilitates determination of an unknown input based on a measured output. Similarly, knowledge of the characterized nonlinear environment also facilitates formation of a desired output based on a configurable input. In both situations, the input thus characterized and the output thus obtained include features that would normally be lost in linear propagations. Such features can include evanescent waves and peripheral waves, such that an image thus obtained are inherently wide-angle, farfield form of microscopy.Type: ApplicationFiled: April 18, 2013Publication date: January 16, 2014Applicant: Opteryx LLCInventor: Opteryx LLC
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Publication number: 20140016184Abstract: A high-power optical fibre laser includes: an oscillator (1); a pumping laser (5) able to emit a high-power pumping optical radiation beam; and a signal-amplifying optical fibre (3) able to receive the optical source signal and the high-power pumping optical radiation beam so as to generate a high-power laser beam. The pumping laser includes a plurality of pumping multimode laser diodes (7a-7f) and a laser cavity, the laser cavity including a double-clad fibre (4) including: a neodymium-doped monomode waveguide; a fibre Bragg grating (9) forming one end of the laser cavity; and a fibre reflector (11) forming the other end of the laser cavity, the monomodefibre laser being able to generate a laser radiation beam when it is optically pumped by a pumping radiation beam originating from the plurality of pumping laser diodes in order for the laser cavity to emit a high-power pumping laser radiation beam.Type: ApplicationFiled: February 14, 2012Publication date: January 16, 2014Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Mathieu Laroche, Herve Gilles, Sylvain Girard, Thierry Robin, Benoit Cadier
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Publication number: 20140007921Abstract: A wavelength conversion element includes at least one wavelength conversion layer. The wavelength conversion layer has a matrix layer and particles that is disposed in the matrix layer. The matrix layer is formed of a curable resin material or an inorganic material with a bandgap of 3 eV or more. The particles are formed of a wavelength conversion composition for wavelength-converting absorbed light in a specific wavelength range into light having energy lower than energy of the absorbed light, and that have a particle diameter of 3 nm to 20 nm. An interval between neighboring particles is equal to or less than the particle diameter of the particles. Consequently, the wavelength conversion layer prevents reflection of light in a wavelength range other than the specific wavelength range.Type: ApplicationFiled: September 11, 2013Publication date: January 9, 2014Applicant: FUJIFILM CorporationInventor: Teruhiko KURAMACHI
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Publication number: 20140009820Abstract: Disclosed are a light conversion member and a display device having the same. The display device includes a light source, and a light conversion member adjacent to the light source. The light conversion member includes a plurality of light conversion particles to convert a wavelength of a light emitted from the light source, and a sealing member to receive the light conversion particles. The sealing member includes an incident part facing an exit surface of the light source, an exit part facing the incident part while the light conversion particles are interposed between the exit part and the incident part, and a reflection part connected to the incident part and the exit part.Type: ApplicationFiled: March 21, 2012Publication date: January 9, 2014Applicant: LG INNOTEK CO., LTD.Inventor: Seung Ryong Park
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Patent number: 8625189Abstract: A sample of nonlinear optical material for use in a nonlinear optical device contains a grating comprising alternating regions of inverted and non-inverted nonlinear coefficient of the material, with the regions separated by boundaries positioned such that the grating can provide quasi-phase matching of a selected nonlinear optical interaction, and compensate for phase mismatch arising from the Gouy phase shift of one or more focused optical beams involved in the interaction. The boundary positions can be calculated for second harmonic generation or optical parametric generation and oscillation.Type: GrantFiled: January 16, 2009Date of Patent: January 7, 2014Assignee: University of SouthamptonInventors: Corin Barry Edmund Gawith, Peter George Robin Smith, Huw Edward Major
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Publication number: 20140002890Abstract: The invention relates to an apparatus for generation of electromagnetic radiation, having a pump light source that emits an excitation radiation at a first wavelength, and having an optical waveguide that generates frequency-converted radiation at a second and a third wavelength, by means of degenerate wave mixing, from the excitation radiation of the pump light source.Type: ApplicationFiled: December 19, 2011Publication date: January 2, 2014Applicants: FRIEDRICH-SCHILLER-UNIVERSITAET JENA, FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: César Jauregui Misas, Andreas Tuennermann, Jens Limpert, Dirk Nodop
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Publication number: 20140002891Abstract: A device of irradiating an electromagnetic wave irradiates an electromagnetic wave having a target frequency in a range of 0.1 THz to 30 THz to the outside of a crystal. The device includes a main body 7 composed of a non-linear optical crystal and a sub wavelength grating structure 5 formed on a surface of the main body 7. The sub wavelength grating structure 5 includes column shaped bodies 6 regularly arranged on a surface 7a of the main body 7. Each of the column shaped bodies 6 includes a constant width part 6d having a constant width and a base part 6g provided from the surface toward the constant width part 6d. A surface 6b of the base part 6g has a shape of an arc having a center of curvature in the outside of the base part 6g viewed in a cross section of the column shaped body cut along a direction X or Y in which the column shaped bodies are arranged.Type: ApplicationFiled: September 9, 2013Publication date: January 2, 2014Applicant: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Yuichi Iwata, Tetsuya Ejiri
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Patent number: 8619355Abstract: A device for generating or receiving electromagnetic radiation in a frequency range from 10 GHz to 100 THz is provided. The device includes a housing and a wave guide fiber leading into the housing. The wave guide fiber is adapted for guiding pulsed laser light with a first central wavelength. Within the housing, a terahertz converter is provided for generating or receiving the electromagnetic radiation in the terahertz range. The device also includes a frequency converter for converting the light exiting from the wave guide fiber to a second central wavelength being arranged between the end of the wave guide fiber and the terahertz converter in such a way that the terahertz converter is impinged by the frequency converted light.Type: GrantFiled: April 26, 2011Date of Patent: December 31, 2013Assignee: Menlo Systems GmbHInventors: Ronald Holzwarth, Rafal Wilk
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Patent number: 8620132Abstract: A terahertz scanning reflectometer is described herein. A high sensitivity terahertz scanning reflectometer is used to measure dynamic surface deformation and delamination characteristics in real-time. A number of crucial parameters can be extracted from the reflectance measurements such as dynamic deformation, propagation velocity, and final relaxation position. A terahertz reflectometer and spectrometer are used to determine the permeation kinetics and concentration profile of active ingredients in stratum corneum.Type: GrantFiled: March 16, 2012Date of Patent: December 31, 2013Inventors: Anis Rahman, Aunik K. Rahman