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公开(公告)号：US09857533B2
公开(公告)日：2018-01-02
申请号：US15450942
申请日：2017-03-06
Applicant: FUJIKURA LTD.
Inventor： Hiroyuki Kusaka , Ryokichi Matsumoto , Kazuhiro Goi , Kensuke Ogawa
CPC classification number: G02B6/126 , G02B6/12 , G02B6/12004 , G02B6/122 , G02B6/1228 , G02B6/125 , G02B6/13 , G02B6/278 , G02B2006/12123 , G02F1/225 , G02F2001/212
Abstract: An optical waveguide element includes a core and a cladding that is made of SiO2. When ng_i_TE is a group refractive index of a TE0 polarized wave in the i-th waveguide counted from a light incidence plane of the core and ng_i_TM is a group refractive index of a TM0 polarized wave in the i-th waveguide, the length L—i[m] of the i-th waveguide satisfies a predetermined relation.
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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：US09874697B1
公开(公告)日：2018-01-23
申请号：US15446510
申请日：2017-03-01
Applicant: Fujikura Ltd.
Inventor： Kazuhiro Goi
CPC classification number: G02B6/2793 , G02B6/2726 , G02B6/2733 , G02B6/2766 , G02B6/2773 , G02B6/4213 , G02B6/4216 , G02B6/4246 , G02F1/0134 , H04B10/2503
Abstract: A bidirectional optical transmission apparatus includes a first optical waveguide device, a second optical waveguide device, and a polarization-maintaining optical fiber that connects the first optical waveguide device and the second optical waveguide device. A direction of a slow axis of the polarization-maintaining optical fiber with respect to a first substrate at a connecting portion between the first optical waveguide device and the polarization-maintaining optical fiber and a direction of the slow axis of the polarization-maintaining optical fiber with respect to the second substrate at a connecting portion between the second optical waveguide device and the polarization-maintaining optical fiber are substantially orthogonal to each other.
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公开(公告)号：US09864215B1
公开(公告)日：2018-01-09
申请号：US15658871
申请日：2017-07-25
Applicant: FUJIKURA LTD.
Inventor： Shinichi Sakamoto , Kazuhiro Goi , Norihiro Ishikura
CPC classification number: G02F1/025 , G02F1/2255 , G02F1/2257 , G02F2201/063 , G02F2201/127
Abstract: Provided is a substrate-type optical waveguide, having a phase modulation function, (i) in which a reflection of a signal to be inputted via a coplanar line is restrained and (ii) which consumes less power. In a case where the substrate-type optical waveguide is partitioned into a plurality of sections by cross sections orthogonal to a direction in which light propagates through a core, a local capacitance in each of the plurality of sections gradually increases as a distance from an entrance end surface increases.
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公开(公告)号：US09448425B2
公开(公告)日：2016-09-20
申请号：US14748331
申请日：2015-06-24
Applicant: FUJIKURA LTD.
Inventor： Kensuke Ogawa , Kazuhiro Goi , Hiroyuki Kusaka
CPC classification number: G02F1/025 , G02B6/1228 , G02B2006/12061 , G02B2006/12097 , G02B2006/12159 , G02F1/015 , G02F1/2257 , G02F2001/0152 , G02F2001/212
Abstract: An optical waveguide element includes: a rib waveguide and a pair of slab portions including a first slab portion and a second slab portion connected to both sides of the rib portion so as to sandwich the rib portion. The rib portion has a cross-sectional dimension which allows the propagation of a fundamental mode and a higher order mode in a predetermined single polarization state, and has a first P-type semiconductor and a first N-type semiconductor forming a PN junction, the first slab portion has a second P-type semiconductor and a P-type conductor connected to each other, the second P-type semiconductor is connected to the first P-type semiconductor of the rib portion, the second slab portion has a second N-type semiconductor and an N-type conductor connected to each other, and the second N-type semiconductor is connected to the first N-type semiconductor of the rib portion.
Abstract translation: 光波导元件包括：肋波导和一对板状部分，其包括连接到肋部分两侧的第一板坯部分和第二板坯部分，以便夹住肋部分。 肋部具有允许在预定的单极化状态下传播基模和高阶模的横截面尺寸，并且具有形成PN结的第一P型半导体和第一N型半导体， 第一板状部具有彼此连接的第二P型半导体和P型导体，第二P型半导体与肋部的第一P型半导体连接，第二板状部具有第二N型半导体， 并且第二N型半导体与肋部的第一N型半导体连接。
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Patent Agency Ranking
公开(公告)号：US09335472B2
公开(公告)日：2016-05-10
申请号：US14509126
申请日：2014-10-08
Applicant: FUJIKURA LTD.
Inventor： Akira Oka , Kensuke Ogawa , Kazuhiro Goi , Hiroyuki Kusaka
CPC classification number: G02B6/1228 , G02B6/125 , G02B6/126 , G02B6/14
Abstract: A planar optical waveguide device, includes: two input portions that are waveguides that have the same width, are parallel to each other, and have rectangular cross-sections; a wide portion that is a linear waveguide and is connected after the two input portions; a tapered portion that is connected after the wide portion and that is a multi-mode waveguide which has a tapered shape having a width decreasing gradually and through which at least TE1 propagates; and an output portion that is connected after the tapered portion and that is a multi-mode waveguide which has a rectangular cross-section and through which at least TE1 propagates. The planar optical waveguide device forms a high-order mode conversion combining element that outputs the TE0, which is input to the two input portions, as the TE1 from the output portion.
Abstract translation: 平面光波导装置包括：具有相同宽度的波导的两个输入部分彼此平行并具有矩形横截面; 宽的部分是线性波导并且在两个输入部分之后连接; 连接在宽部分之后的锥形部分，并且是具有逐渐减小并且至少TE1传播的宽度的锥形形状的多模式波导; 以及输出部分，其连接在锥形部分之后，并且是具有矩形横截面且至少TE1传播的多模波导的输出部分。 平面光波导器件形成从输出部分输出到两个输入部分的TE1作为TE1的高阶模式转换组合元件。
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公开(公告)号：US09110348B2
公开(公告)日：2015-08-18
申请号：US14260883
申请日：2014-04-24
Applicant: FUJIKURA, LTD.
Inventor： Kazuhiro Goi , Kensuke Ogawa
CPC classification number: G02F1/2257 , G02B6/122 , G02B6/2935 , G02B2006/12061 , G02B2006/12097 , G02B2006/12142 , G02B2006/12159 , G02F2001/0151 , G02F2001/212 , G02F2201/063
Abstract: Provided is an optical element including an optical waveguide including a core formed from: a rib part; and a first and second slab parts sandwiching the rib part. The first slab part includes a P-type region, the second slab part includes an N-type region, the rib part includes a P-type region which is in contact with the P-type region provided in the first slab part, and an N-type region which is in contact with the N-type region provided in the second slab part. The rib part includes a top portion which is located above the first and second slab parts and includes an undoped region formed from at least one of an intrinsic region and a low-concentration doping region which is doped at a dopant concentration 1/10 or less of a dopant concentration in at least one of the adjacent P-type region and the adjacent N-type region.
Abstract translation: 本发明提供一种光学元件，其包括：光波导，包括芯，所述芯由以下部分形成：肋部; 以及夹着所述肋部的第一和第二板坯部。 第一板坯部包括P型区域，第二板坯部包括N型区域，肋部包括与设置在第一板坯部中的P型区域接触的P型区域， N型区域与设置在第二板坯部分中的N型区域接触。 肋部分包括位于第一和第二板坯部分上方的顶部部分，并且包括由掺杂浓度为1/10以下的本征区域和低浓度掺杂区域中的至少一个形成的未掺杂区域 在相邻的P型区域和相邻的N型区域中的至少一个中的掺杂剂浓度。
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公开(公告)号：US20180224613A1
公开(公告)日：2018-08-09
申请号：US15889931
申请日：2018-02-06
Applicant: FUJIKURA LTD.
Inventor： Kazuhiro Goi , Katsuhiro Takenaga
IPC: G02B6/42
CPC classification number: G02B6/4216 , G02B6/02042 , G02B6/024 , G02B6/28 , G02B6/2804 , G02B6/34 , G02B6/4213 , G02B6/4214 , G02B6/4246 , H04B10/40
Abstract: An optical transmission device includes a plurality of transmitting/receiving units provided on a substrate, each transmitting/receiving unit includes: an optical transmitter; an optical receiver; a polarization combiner/splitter; and a connection portion. In the connection portions which are arranged at the positions symmetrical to each other, a direction opposite, with respect to a virtual symmetry axis, to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from one of the connection portions to an outside is substantially orthogonal to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from the other of the connection portions to an outside.
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公开(公告)号：US20180059327A1
公开(公告)日：2018-03-01
申请号：US15689121
申请日：2017-08-29
Applicant: FUJIKURA LTD.
Inventor： Shinichi Sakamoto , Kazuhiro Goi , Norihiro Ishikura
CPC classification number: G02B6/29325 , G02B6/10 , G02B6/125 , G02B6/126 , G02B6/29394 , G02F1/035
Abstract: In order to reduce a high frequency loss of a substrate-type optical waveguide without facilitating, in a low frequency domain, a reflection by an entrance end of a traveling-wave electrode, the substrate-type optical waveguide includes a coplanar line, provided on an upper surface of an upper cladding, which includes (i) a traveling-wave electrode connected to a P-type semiconductor region and (ii) an earth conductor connected to an N-type semiconductor region. The traveling-wave electrode and the earth conductor are provided so that a distance D therebetween decreases as a distance from an entrance end of the traveling-wave electrode increases.
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公开(公告)号：US09880404B2
公开(公告)日：2018-01-30
申请号：US15284971
申请日：2016-10-04
Applicant: FUJIKURA LTD. , AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Kensuke Ogawa , Kazuhiro Goi , Guo-Qiang Lo , Tsung-Yang Jason Liow , Xiaoguang Tu
CPC classification number: G02F1/025 , G02B2006/12097 , G02F1/0018 , G02F1/015 , G02F2001/0151 , G02F2001/212
Abstract: An optical waveguide device includes a substrate; a lower cladding disposed on the substrate; a rib waveguide including a slab disposed on the lower cladding and a single rib disposed on the slab contiguous to the slab; and an upper cladding disposed on the rib waveguide. The rib waveguide includes a first doped region having a first electric conductivity exhibiting a P-type electric conductivity across the rib and the slab and a second doped region being contiguous to the first doped region and having a second electric conductivity exhibiting an N-type electric conductivity across the rib and the slab.
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