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公开(公告)号：US20240353733A1
公开(公告)日：2024-10-24
申请号：US18685318
申请日：2021-09-15
发明人： Osamu Tadanaga , Takushi Kazama
CPC分类号： G02F1/3501 , G02F1/377 , G02F2202/20
摘要： The present disclosure provides a wavelength conversion element that uses a second-order nonlinear optical effect and can suppress unintended wavelength conversion due to high-order quasi-phase matching. A wavelength conversion element according to the present disclosure includes: a substrate; and a core that is bonded onto the substrate and performs wavelength conversion of incident light, the core has a structure in which first spontaneous polarization and second spontaneous polarization are periodically inverted with respect to an optical axis direction, and the wavelength conversion element has a structure in which a cross-sectional area of the core changes with respect to the optical axis direction such that the cross-sectional area is maximum at an end portion and is minimum at a central portion in a region having the first spontaneous polarization and a region having the second spontaneous polarization.
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公开(公告)号：US20240192574A1
公开(公告)日：2024-06-13
申请号：US18584710
申请日：2024-02-22
发明人： Matthew Wade Puckett , Chad Fertig , Matthew Robbins , Jad Salman
CPC分类号： G02F1/3548 , G02F1/3775 , H01S3/0092 , H01S3/109
摘要： A nonlinear wave mixing system with grating assisted phase matching is provided. The system includes a pump laser and a nonlinear waveguide. The pump laser is used to generate pump light at a select wavelength. The nonlinear waveguide is configured to generate produced light from the pump light that is directed into the nonlinear waveguide. The nonlinear waveguide includes at least one backward grating that is configured to diffract the produced light in a backward direction relative to a direction the produced light travels in the nonlinear waveguide to reach the backward grating. The backward grating having a grating momentum that generates counter-propagating phase matching in the produced light.
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3.发明公开公开(公告)号：US20240069436A1
公开(公告)日：2024-02-29
申请号：US18503908
申请日：2023-11-07
发明人： Chen CHEN , Zhanghua HAN , Shengkun YAO , Feng CHEN
CPC分类号： G03F7/0007 , G02F1/377 , G03F7/162 , G03F7/40 , G03F7/038
摘要： A method for building an etching-free hybrid nonlinear waveguide composed of a polymer and an ion-implanted nonlinear crystal is provided. A nonlinear crystal is pretreated, and subjected to ion implantation to obtain an ion-implanted nonlinear crystal. The ion-implanted nonlinear crystal is spin-coated with a photoresist, and subjected to electron beam exposure, heating, and developing, so as to obtain a hybrid optical waveguide composed of a polymer and a nonlinear crystal.
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公开(公告)号：US11768421B2
公开(公告)日：2023-09-26
申请号：US17917730
申请日：2020-04-20
发明人： Osamu Tadanaga , Takeshi Umeki , Koji Embutsu , Nobutatsu Koshobu , Takahiro Kashiwazaki , Asuka Inoue , Takushi Kazama , Ryoichi Kasahara
CPC分类号： G02F2/006 , G02F1/3548 , G02F1/3551 , G02F1/377
摘要： A wavelength conversion device includes a second-order nonlinear optical medium with a polarization inversion structure, wherein the wavelength conversion device performs wavelength conversion between three wavelengths according to a relationship of 1/λ1=1/λ2+1/λ3, a polarization inversion period Λ of the polarization inversion structure is divided into 2a regions, and when the 2a regions divided from the polarization inversion period Λ each has a width ratio of an inverted region and a non-inverted region of r to 1−r (where 0≤r≤1), a ratio value r is set such that, when one period in phase of a sine function from 0 to 2π is divided into 2a regions, a value of the sine function in a center of each divided region is (1−2r)±0.1.
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公开(公告)号：US20230197910A1
公开(公告)日：2023-06-22
申请号：US18108572
申请日：2023-02-10
发明人： Tae-woo LEE , Younghoon KIM , Himchan CHO
CPC分类号： H01L33/504 , C09K11/025 , C09K11/06 , H01L33/502 , H01L33/505 , G02F1/3551 , G02F1/3775 , C09K2211/188 , H01L33/507
摘要： Provided are a wavelength converting particle, a method for manufacturing a wavelength converting particle, and a light-emitting diode containing a wavelength converting particle. The wavelength converting particle comprises a hybrid OIP nanocrystal that converts a wavelength of light generated by an excitation light source into a specified wavelength. Accordingly, it is possible to optically stabilize and improve color purity and light-emission performance without changes in a light-emitting wavelength range.
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公开(公告)号：US20220413355A1
公开(公告)日：2022-12-29
申请号：US17779958
申请日：2019-12-03
发明人： Takeshi Umeki , Takushi Kazama , Takahiro Kashiwazaki , Koji Embutsu , Osamu Tadanaga , Asuka Inoue , Ryoichi Kasahara
摘要： A highly-efficient ridge waveguide includes a base substrate of a single-crystal and a core substrate made of a nonlinear optical medium, the base substrate and the core substrate being directly bonded, and includes a thin film layer formed on a surface of the core substrate on the upper side of a periodically polarization-reversed structure, and becomes a wavelength conversion element. A direct bonding method through thermal diffusion is applied to bonding. The core substrate has a ridge structure formed in a light propagating direction and a reversed structure formed by processing this. A surface of the core substrate is ground and a thin film layer is formed on the ground surface. A core formed by digging a core layer of the core substrate in an unbonded state is provided on an upper surface of an undercladding layer of the base substrate in a bonded state. Two side surfaces of the core are in contact with an air layer.
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公开(公告)号：US20220229345A1
公开(公告)日：2022-07-21
申请号：US17655930
申请日：2022-03-22
申请人： The Boeing Company
发明人： Brett Yurash
摘要： An optical waveguide structure comprises a nonlinear optical waveguide, straight segments in the nonlinear optical waveguide, and curved segments in the nonlinear optical waveguide. The nonlinear optical waveguide comprises a nonlinear optical material having a second order nonlinear coefficient for a nonlinear optical process in which the second order nonlinear coefficient changes with a direction of light propagation. The straight segments in the nonlinear optical waveguide are oriented such a nonlinear optical interaction with light generation that occurs with an overall constructive manner within the nonlinear optical waveguide in response to a light traveling though the nonlinear optical waveguide. The curved segments have a 90 degree bend, wherein the curved segments connect the straight segments to each other within in the nonlinear optical waveguide.
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公开(公告)号：US20220107547A1
公开(公告)日：2022-04-07
申请号：US17450044
申请日：2021-10-05
申请人： The Boeing Company
发明人： Daniel Yap , Shuoqin Wang , Ivan Alvarado , Brett Yurash , Thaddeus Ladd
摘要： An optical waveguide structure comprises a nonlinear optical waveguide comprising a nonlinear optical material having a second order nonlinear coefficient that changes with a direction of light propagation. A first portion of the nonlinear optical waveguide in which a light propagating through the first portion is affected by a positive value of a second order nonlinear coefficient. A second portion of the nonlinear optical waveguide in which the light propagating through the first portion is affected by a negative value of a second order nonlinear coefficient, wherein a set of dimensions in the nonlinear optical waveguide in the first portion and the second portion is selected to cause the light to have a phase walk-off that is an odd multiple of 180 degrees.
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公开(公告)号：US20220021176A1
公开(公告)日：2022-01-20
申请号：US17296114
申请日：2019-11-20
发明人： Nils WERNER , Julian HOFMANN , Roland BEGE , Alexander SAHM , Katrin PASCHKE
摘要： The present invention relates to a device for generating laser radiation.
A problem addressed by the present invention is that of specifying a device for generating laser radiation using a nonlinear crystal, which device has a simple construction and low optical losses.
The device according to the invention comprises an optical amplifier having an active zone, wherein the optical amplifier has a front facet and a rear facet, between which the active zone extends; and a resonator having a first resonator element and a second resonator element, between which the optical amplifier extends, wherein the first resonator element is arranged on a side of the active zone facing away from the front facet and the second resonator element is arranged on a side of the active zone facing the front facet, and wherein the second resonator element comprises a nonlinear crystal having periodic poling.-
10.发明申请公开(公告)号：US20210223471A1
公开(公告)日：2021-07-22
申请号：US17054091
申请日：2019-04-18
发明人： Takahiro Kashiwazaki , Ryoichi Kasahara , Osamu Tadanaga , Takeshi Umeki , Koji Embutsu , Takushi Kazama
摘要： With a wavelength conversion device based on a nonlinear optical effect, when arrayed waveguides including an intended nonlinear waveguide are fabricated, unwanted slab waveguides are inevitably formed. The slab waveguides can cause an erroneous measurement in the selection of a waveguide having desired characteristics from the arrayed waveguides. The erroneous measurement can lead to redoing steps for fabricating the wavelength conversion device and a decrease in the yield and inhibit the evaluation of the characteristics in selection of the waveguide and the subsequent fabrication of the wavelength conversion device from being efficiently performed. A wavelength conversion device according to the present invention includes a plurality of waveguides formed on a substrate, and a plurality of slab waveguides that are arranged substantially in parallel with and spaced apart from the plurality of waveguides, and a guided light attenuator is formed in each of the slab waveguides. The guided light attenuators allow efficient selection of a waveguide having desired optical characteristics from the plurality of waveguides. The light attenuation by the guided light attenuators can be changed in steps for fabricating the wavelength conversion device.
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