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11.发明授权Planar optical waveguide element, dual polarization quadrature phase shift keying modulator, coherent receiver, and polarization diversity 有权平面光波导元件，双极化正交相移键控调制器，相干接收器和极化分集公开(公告)号：US09500807B2
公开(公告)日：2016-11-22
申请号：US14827397
申请日：2015-08-17
Applicant: Fujikura Ltd.
Inventor： Akira Oka
CPC classification number: G02B6/1228 , G02B6/00 , G02B6/125 , G02B6/14 , G02B2006/12038 , G02B2006/12061 , G02F1/011 , G02F1/0136 , G02F2001/0113 , G02F2001/0142
Abstract: A planar optical waveguide element includes: a substrate; and an optical waveguide comprising a core and a cladding, the core being provided on the substrate so as to include first and second core regions arranged in parallel, the cladding having a smaller refractive index than the core. Also, the core forms a preceding-stage mode conversion portion that converts a mode of input light and a subsequent-stage mode conversion portion that converts a mode of light output from the preceding-stage mode conversion portion, and the first and second core regions are spaced apart from each other at an input end of the subsequent-stage mode conversion portion, and a gap between the first and second core regions is continuously decreased along the light waveguide direction such that the first and second core regions are in contact with each other at an output end of the subsequent-stage mode conversion portion.
Abstract translation: 平面光波导元件包括：基板; 以及包括芯和包层的光波导，所述芯设置在所述基板上，以包括平行布置的第一和第二芯区域，所述包层具有比所述芯更小的折射率。 此外，核心形成转换输入光的模式的前级模式转换部分和转换从前级模式转换部分输出的光的模式的后级模式转换部分，以及第一和第二核心区域 在后级模式转换部分的输入端处彼此间隔开，并且第一和第二芯区域之间的间隙沿着光波导方向连续地减小，使得第一和第二芯区域与每个 另一个在后级模式转换部分的输出端。
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公开(公告)号：US09304254B2
公开(公告)日：2016-04-05
申请号：US14617155
申请日：2015-02-09
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/0048 , G02B6/2773 , G02B2006/12147 , G02F1/3133 , G02F2201/063 , G02F2202/105 , G02F2203/06
Abstract: Since a cross section of at least a partial segment of a first core has a step-like shape including a quadrilateral shape of a main part and a quadrilateral shape of a protruding part protruding from the main part, respective effective refractive indices of TE polarized waves in the first core and in the second core differ from each other.
Abstract translation: 由于第一芯的至少部分段的截面具有包括主要部分的四边形形状和从主要部分突出的突出部分的四边形形状的阶梯状形状，所以TE偏振波的有效折射率 在第一核心和第二核心中彼此不同。
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公开(公告)号：US09008476B2
公开(公告)日：2015-04-14
申请号：US14314827
申请日：2014-06-25
Applicant: Fujikura Ltd.
Inventor： Akira Oka , Kazuhiro Goi , Kensuke Ogawa , Hiroyuki Kusaka
CPC classification number: G02B6/2804 , G02B6/2726 , G02B6/2733 , G02B6/2821
Abstract: A polarization conversion device includes: a directional coupler that includes an input side optical waveguide and an output side optical waveguide which are disposed in parallel to each other and each of which has a core. Assuming that a direction in which the input side optical waveguide and the output side optical waveguide face each other is a width direction and a direction perpendicular to the width direction is a height direction in a cross section perpendicular to a longitudinal direction of each of the input side optical waveguide and the output side optical waveguide, and the directional coupler is configured to couple first light guided through the input side optical waveguide to second light guided through the output side optical waveguide, the polarization direction of the second light is perpendicular to that of the first light.
Abstract translation: 偏振转换装置包括：定向耦合器，其包括彼此平行设置并且具有芯的输入侧光波导和输出侧光波导。 假设输入侧光波导和输出侧光波导面对的方向是宽度方向和垂直于宽度方向的方向是垂直于每个输入端的纵向方向的横截面中的高度方向 并且定向耦合器被配置为将通过输入侧光波导引导的第一光耦合到通过输出侧光波导引导的第二光，第二光的偏振方向垂直于 第一盏灯。
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公开(公告)号：US09851505B2
公开(公告)日：2017-12-26
申请号：US15447693
申请日：2017-03-02
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/1228 , G02B6/125 , G02B6/2773 , G02F1/011 , G02F2203/07 , H04J14/06
Abstract: Provided is a substrate-type optical waveguide element in which when (i) effective refractive indexes of a TE polarized wave and a TM polarized wave in the first core are NTE@WG1 and NTM@WG1, respectively, and (ii) effective refractive indexes of a TE polarized wave and a TM polarized wave in the second core are NTE@WG2 and NTM@WG2, respectively, a magnitude relation of the effective refractive indexes NTM@WG1 and NTM@WG2 at a start position of a parallel-core section is opposite to a magnitude relation of the effective refractive indexes NTM@WG1 and NTM@WG2 at an end position of the parallel-core section, and at least one of the cores includes (a) a main part having a quadrilateral cross section and (b) a protruding part protruding from one of side surfaces of the main part in a direction parallel to a boundary surface between a lower cladding and a upper cladding.
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Patent Agency Ranking
公开(公告)号：US09835798B2
公开(公告)日：2017-12-05
申请号：US15418878
申请日：2017-01-30
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/122 , G02B6/125 , G02B6/14 , G02B6/274 , G02B6/2766 , G02B6/305 , G02B2006/12147
Abstract: A planar optical waveguide device includes: a substrate; and an optical waveguide that includes a core and a cladding. The core forms a preceding-stage mode conversion section and a subsequent-stage mode conversion section, the preceding-stage mode conversion section being configured to convert a mode of input light, the subsequent-stage mode conversion section being configured to convert a mode of light output from the preceding-stage mode conversion section. Sectional shapes of the first core portion and the second core portion are not congruent with each other at an input end of the preceding-stage mode conversion section, the sectional shape or size of at least one core is continuously changed along a light waveguide direction, and sectional shapes of the first core portion and the second core portion are congruent with each other at an output end of the preceding-stage mode conversion section.
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公开(公告)号：US09810842B2
公开(公告)日：2017-11-07
申请号：US15447615
申请日：2017-03-02
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/122 , G02B6/1228 , G02B6/125 , G02B6/14 , G02B6/2773 , G02B2006/121 , G02B2006/12142 , G02F1/01 , G02F1/011 , G02F2203/07 , H04J14/06
Abstract: An effective refractive index of a TM0 polarized wave guided through the first core when existing alone and an effective refractive index of a TE0 polarized wave guided through the second core when existing alone are continuous as a function of a distance from a starting point of a side-by-side arrangement section. A magnitude relationship between an effective refractive index of an odd mode of a TE0 polarized wave guided through the side-by -side arrangement section and an effective refractive index of an even mode of a TM0 polarized wave guided through the side-by-side arrangement section is reversed between the starting point and an ending point of the side-by-side arrangement section. A refractive index distribution is vertically asymmetrical in an interaction section.
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公开(公告)号：US20170176678A1
公开(公告)日：2017-06-22
申请号：US15447659
申请日：2017-03-02
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/1228 , G02B6/125 , G02B6/14 , G02B6/2773 , G02F1/011 , G02F2203/07 , H04J14/06
Abstract: An effective refractive index of a TM0 polarized wave guided through the first core when existing alone and an effective refractive index of a TE0 polarized wave guided through the second core when existing alone are continuous as a function of a distance from a starting point of a side-by-side arrangement section. A magnitude relationship between an effective refractive index of an odd mode of a TE0 polarized wave guided through the side-by-side arrangement section and an effective refractive index of an even mode of a TM0 polarized wave guided through the side-by-side arrangement section is reversed between the starting point and an ending point of the side-by-side arrangement section. A refractive index distribution is vertically asymmetrical in an interaction section. An emission edge surface and an emission edge surface cover an entrance edge surface without excess or deficiency.
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公开(公告)号：US09529151B2
公开(公告)日：2016-12-27
申请号：US14976868
申请日：2015-12-21
Applicant: FUJIKURA LTD.
Inventor： Kazuhiro Goi , Akira Oka , Hiroyuki Kusaka , Kensuke Ogawa
CPC classification number: G02B6/126 , G02B6/1228 , G02B6/14 , G02B2006/1209 , G02B2006/12097 , G02B2006/12142 , G02B2006/12152 , G02B2006/12164
Abstract: A polarization conversion element is disclosed in which an optical waveguide formed on a substrate sequentially includes a first waveguide portion, a polarization rotation portion, and a second waveguide portion, an effective refractive index of a TE mode having the highest effective refractive index in an eigen mode of waveguide light on a sectional surface of the first waveguide portion is higher than an effective refractive index of a TM mode having the highest effective refractive index, an effective refractive index of the TM mode having the highest effective refractive index on a sectional surface of the second waveguide portion is higher than an effective refractive index of the TE mode having the highest effective refractive index, and heights of waveguide structures (for example, cores) of the first waveguide portion and the second waveguide portion are equal to each other.
Abstract translation: 公开了一种偏振转换元件，其中形成在基板上的光波导依次包括第一波导部分，偏振旋转部分和第二波导部分，在特征中具有最高有效折射率的TE模式的有效折射率 在第一波导部分的截面上的波导光的模式高于具有最高有效折射率的TM模式的有效折射率，在截面上具有最高有效折射率的TM模的有效折射率 第二波导部分高于具有最高有效折射率的TE模式的有效折射率，并且第一波导部分和第二波导部分的波导结构（例如，芯）的高度彼此相等。
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公开(公告)号：US20150234121A1
公开(公告)日：2015-08-20
申请号：US14617155
申请日：2015-02-09
Applicant: FUJIKURA LTD.
Inventor： Akira Oka
CPC classification number: G02B6/126 , G02B6/0048 , G02B6/2773 , G02B2006/12147 , G02F1/3133 , G02F2201/063 , G02F2202/105 , G02F2203/06
Abstract: Since a cross section of at least a partial segment of a first core has a step-like shape including a quadrilateral shape of a main part and a quadrilateral shape of a protruding part protruding from the main part, respective effective refractive indices of TE polarized waves in the first core and in the second core differ from each other.
Abstract translation: 由于第一芯的至少部分段的截面具有包括主要部分的四边形形状和从主要部分突出的突出部分的四边形形状的阶梯状形状，所以TE偏振波的有效折射率 在第一个核心和第二个核心是不同的。
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