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公开(公告)号：US20180348430A1
公开(公告)日：2018-12-06
申请号：US15990989
申请日：2018-05-29
Applicant: FUJIKURA LTD.
Inventor： Kensuke Ogawa
Abstract: Provided is an optical waveguide element having a reduced optical loss, a lower driving voltage, and a reduced size. A rib waveguide core of an optical waveguide includes a first core region and a second core region which constitute a PN junction and which are provided so as to overlap each other in a horizontal direction. A depletion layer is formed between the first core region and the second core region. The depletion layer extends from a rib region to both of two slab regions. The depletion layer is located so as to be vertically lower in the slab regions than in the rib region.
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公开(公告)号：US10014953B2
公开(公告)日：2018-07-03
申请号：US15384467
申请日：2016-12-20
Applicant: FUJIKURA LTD.
Inventor： Kensuke Ogawa
IPC: H04B10/60 , H04B10/61 , G02B6/125 , G02B6/126 , G02B6/27 , H04L5/00 , H04J14/06 , H04B10/64 , G02B6/12
CPC classification number: H04B10/613 , G02B6/125 , G02B6/126 , G02B6/2766 , G02B6/2773 , G02B2006/12147 , G02B2006/1215 , H04B10/614 , H04B10/64 , H04J14/06 , H04L5/0048
Abstract: An optical receiver circuit includes: a substrate; and an optical waveguide device that is formed on the substrate. The optical waveguide device includes: a first optical splitter section branching the signal light into a first signal light propagation waveguide and a second signal light propagation waveguide and; a second optical splitter section branching the local-oscillator light into a first local-oscillator light propagation waveguide and a second local-oscillator light propagation waveguide; a first optical coupler section that combines the signal light propagating through the first signal light propagation waveguide and the local-oscillator light propagating through the first local-oscillator light propagation waveguide with each other; a second optical coupler section that combines the signal light propagating through the second signal light propagation waveguide and the local-oscillator light propagating through the second local-oscillator light propagation waveguide with each other.
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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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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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Patent Agency Ranking
公开(公告)号：US09817294B2
公开(公告)日：2017-11-14
申请号：US14748895
申请日：2015-06-24
Applicant: FUJIKURA LTD.
Inventor： Kazuhiro Goi , Hiroki Ishihara , Kensuke Ogawa , Kenji Oda , Hiroyuki Kusaka , Ryokichi Matsumoto , Hitoshi Uemura
CPC classification number: G02F1/2257 , G02B6/122 , G02B6/1228 , G02B6/125 , G02B6/29353 , G02B6/29355 , G02B2006/12097 , G02B2006/12142 , G02B2006/12147 , G02B2006/12159 , G02F1/025 , G02F1/218 , G02F1/2255 , G02F2001/212 , G02F2201/58
Abstract: An optical modulation device configured of a planar optical waveguide, includes: a light incidence unit which allows light to be incident on the planar optical waveguide; a Mach-Zehnder interferometer which includes a first optical splitter section branching the light incident on the light incidence unit, two arm portions guiding the light branched by the first optical splitter section, a phase modulation unit linearly disposed on each of the two arm portions, and a first optical coupler section combining the light guided from the two arm portions; a light launching unit which launches the light combined by the first optical coupler section from the planar optical waveguide; and a traveling-wave electrode which includes an input unit and an output unit, and applies a voltage to the phase modulation unit.
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公开(公告)号：US09726822B1
公开(公告)日：2017-08-08
申请号：US15441611
申请日：2017-02-24
Applicant: Fujikura Ltd.
Inventor： Kensuke Ogawa
CPC classification number: G02B6/125 , G02B6/126 , G02B6/2766 , G02B2006/1215 , G02F1/0123 , G02F1/2257 , G02F2001/212 , G02F2201/06 , G02F2201/58 , G02F2203/07
Abstract: An optical integrated circuit includes: a mode conversion and branching section that launches light from a first optical waveguide to a second optical waveguide, converts light from the first optical waveguide into converted light, and launches the converted light to a third optical waveguide; an optical multiplexing and branching section that multiplexes lights from the second and third optical waveguides into one multiplexed light component, and branches the multiplexed light component into a light component to be input to a fourth optical waveguide and a light component to be input to a fifth optical waveguide; a phase modulation section that is provided in at least one of the fourth and fifth optical waveguides and modulates a phase of guided light; and an optical multiplexing section that multiplexes light components from the fourth and fifth optical waveguides into one light component.
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公开(公告)号：US20170176681A1
公开(公告)日：2017-06-22
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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9.发明授权公开(公告)号：US08699013B2
公开(公告)日：2014-04-15
申请号：US13864787
申请日：2013-04-17
Applicant: Fujikura Ltd.
Inventor： Kensuke Ogawa
IPC: G01N21/00
CPC classification number: G01J3/45 , G01M11/331 , G01M11/335 , G01M11/336
Abstract: Provided is a chromatic dispersion measurement device including a light branching unit that divides a incident measured light signal into a first measured light signal and a second measured light signal and causes a frequency difference between the first measured light signal and the second measured light signal when the signals are output, an optical phase shifter provided in either one of the first branch path and the second branch path having a polarization maintaining characteristic and periodically changing a phase αi of the measured light signal, an optical combination unit that combines the first measured light signal and the second measured light signal and outputs an interference element of an i-th optical component obtained by interference of the first measured light signal and the second measured light signal when the phase difference is the phase αi, as a combined measured light signal.
Abstract translation: 提供一种色散测量装置，其包括：光分支单元，其将入射的测量光信号分为第一测量光信号和第二测量光信号，并且当第一测量光信号和第二测量光信号之间的频率差 输出信号，设置在第一分支路径和第二分支路径中的任一个中的具有偏振维持特性并周期性地改变测量光信号的相位αi的光学移相器，组合第一测量光信号的光学组合单元 和第二测量光信号，并且当相位差为相位αi时，输出通过第一测量光信号和第二测量光信号的干扰获得的第i个光学分量的干扰元素作为组合的测量光信号。
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公开(公告)号：US09857534B2
公开(公告)日：2018-01-02
申请号：US14422926
申请日：2013-08-13
Applicant: FUJIKURA LTD.
Inventor： Hiroyuki Kusaka , Kensuke Ogawa , Kazuhiro Goi
CPC classification number: G02B6/2821 , G02B6/122 , G02B6/125 , G02B6/14 , G02B6/2813 , G02B6/2935 , G02F1/225 , G02F1/2255 , G02F2001/212
Abstract: An optical waveguide device includes: a mode splitter including a main waveguide in which lights can be propagated in at least two propagation modes with different propagation orders and a subsidiary waveguide which includes a coupling section disposed in parallel with the main waveguide at a certain distance away from the main waveguide so as to constitute a directional coupler and is capable of splitting at least one propagation mode out of the two or more propagation modes from the main waveguide. Also, ncore/ncladding which is a refractive index ratio between a core and a cladding which constitute the main waveguide and the subsidiary waveguide is in a range of 101% to 250%.
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