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公开(公告)号：US10466513B2
公开(公告)日：2019-11-05
申请号：US15755764
申请日：2016-09-27
发明人： Toshio Kataoka , Junichiro Ichikawa
摘要： Provided is an optical waveguide device in which destabilization of a DC bias which is applied to an optical waveguide, due to a bias electrode picking up electric noise, is reduced and an operating characteristic is stable.An optical waveguide device includes: a substrate having an electro-optic effect; an optical waveguide formed on the substrate; a modulation electrode for applying an electric field corresponding to a modulation signal to the optical waveguide; and a bias electrode for applying an electric field corresponding to a DC bias to the optical waveguide, in which in order to reduce capture of electric noise by the bias electrode, with respect to at least a part of the bias electrode, a plurality of electrode portions (b11, b12) are formed in at least one (B1) of the pair of electrodes by folding back one electric line.
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公开(公告)号：US10126505B2
公开(公告)日：2018-11-13
申请号：US15893742
申请日：2018-02-12
发明人： Tokutaka Hara , Toshio Kataoka
摘要： An optical element module includes an optical modulation element having first and second optical modulator units, a polarization combining means for combining two modulated lights which are emitted from the first and second optical modulator units, by making planes of polarization orthogonally cross each other; a housing which houses the optical modulation element and the polarization combining means; and a lens holder which holds a collimating lens which is disposed between the polarization combining means and an optical fiber, with the lens holder further holding the optical fiber. The optical element module is configured by joining the housing and the lens holder together by welding. In the lens holder, an outer diameter of a welding place is smaller than an outer diameter of a part which holds the collimating lens.
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公开(公告)号：US10067403B2
公开(公告)日：2018-09-04
申请号：US15504292
申请日：2015-08-31
发明人： Toshio Kataoka , Junichiro Ichikawa
IPC分类号： G02F1/313
摘要： Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits, along the flat surface of the relay substrate, an electrical signal that has been input from an outer side; a second transmission line that is provided in the relay substrate, and transmits the electrical signal in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from a contact of the first transmission line and the second transmission line.
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公开(公告)号：US20180120666A1
公开(公告)日：2018-05-03
申请号：US15509692
申请日：2016-03-09
CPC分类号： G02F1/2257 , G02F1/035 , G02F1/225 , G02F1/2255 , G02F2001/212 , H01P3/003
摘要： In a waveguide-type optical element, broaderband operation becomes possible.The waveguide-type optical element includes optical waveguides (110 and 112) formed on a substrate (100) having an electro-optic effect and a control electrode for controlling an optical wave that is transmitted through the optical waveguide, the control electrode comprises a central electrode (104) and ground electrodes (106 and 108), the central electrode being formed along the optical waveguide, and the ground electrodes being formed so as to put the central electrode therebetween in a surface direction of the substrate at a predetermined distance from the central electrode, and the central electrode or the ground electrodes have multiple pairs of facets, each comprising two facets facing each other, along a transmission direction of high-frequency signals that are transmitted through the central electrode and the ground electrodes.
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公开(公告)号：US09523872B2
公开(公告)日：2016-12-20
申请号：US15082003
申请日：2016-03-28
CPC分类号： G02F1/0316 , G02B6/00 , G02B6/12 , G02F1/025 , G02F1/0356 , G02F1/2255 , G02F2201/121
摘要： [Task] Reduction in crosstalk between signal electrodes.[Means for Resolution] An optical modulator 1 includes a relay substrate 3 including a substrate portion 30, and signal electrodes 31 and 32, and a ground electrode 33 which are provided on the substrate portion 30, and an optical waveguide substrate 4 including an electrode-optical substrate 40, signal electrodes 431 and 432, and an optical waveguide 42 which are provided on the electro-optical substrate 40. Modulation signals are input from ends 31a and 32a on one side of the signal electrodes 31 and 32, the other end 31b of the signal electrode 31 is electrically connected to the signal electrode 431, the other end 32b of the signal electrode 32 is electrically connected to the signal electrode 432, an optical wave, which propagates through the optical waveguide 42, is modulated by the modulation signals which propagate through the signal electrodes 431 and 432, the ground electrode 33 is provided between the signal electrodes 31 and 32, and the relay substrate 3 includes a first adjacent portion 44 at which the signal electrodes 31 and 32 are adjacent to each other, and a through-hole 30g that is provided in the ground electrode 33 at the first adjacent portion 44.
摘要翻译： [解决方法]光调制器1包括：设置在基板部30上的基板部30，信号电极31,32以及接地电极33的中继基板3和具有电极的光波导基板4 - 光学基板40，信号电极431和432以及设置在电光基板40上的光波导42。调制信号从信号电极31,32的一侧的端部31a和32a输入，另一端 信号电极31的31b与信号电极431电连接，信号电极32的另一端32b与信号电极432电连接，通过光波导路42传播的光波被调制 通过信号电极431和432传播的信号，接地电极33设置在信号电极31和32之间，继电器基板3包括第一个广告 信号电极31和32彼此相邻的相邻部分44，以及设置在第一相邻部分44处的接地电极33中的通孔30g。
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公开(公告)号：US11493788B2
公开(公告)日：2022-11-08
申请号：US17170034
申请日：2021-02-08
发明人： Takeshi Sakai , Toshio Kataoka
摘要： An optical modulator includes a substrate on which an optical waveguide and a modulation electrode that modulates a light wave propagating through the optical waveguide are formed, and a case housing the substrate, the optical waveguide includes at least an optical branching part that branches one light wave into two light waves or an optical combining part that combines two light waves into one light wave, the modulation electrode has a signal electrode and a ground electrode, and a part of the signal electrode is disposed so as to cross the optical branching part or the optical combining part, and the optical modulator is provided with a suppressing unit that suppresses changes in an intensity ratio of the light waves branched at the optical branching part or an intensity ratio of the light waves combined at the optical combining part, by the signal electrode.
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公开(公告)号：US10481464B2
公开(公告)日：2019-11-19
申请号：US15516028
申请日：2016-04-28
发明人： Toshio Kataoka , Kei Kato
摘要： The objective of the present invention is to provide an optical modulator adapted for use with various modulating units and various modulation regions, and with which variability in optical losses is limited as far as possible. An optical modulator in which an optical waveguide and a control electrode for controlling an optical wave propagating through the optical waveguide are provided in a substrate, characterized in that: the optical waveguide is provided with a first branching portion which causes one input light beam to branch into two light beams; each of a first and a second modulating portion connected to two branched waveguides which branch at the first branching portion is provided with a structure in which one or more Mach-Zehnder type optical waveguides are combined; the control electrode comprises signal electrodes which apply modulated signals to the first and second modulating portions; input portions of all the signal electrodes are disposed on either the left or the right of the substrate relative to the direction in which the optical wave propagates; and in relation to output portions of the signal electrodes, the output portions of the signal electrodes led out from each modulating portion are disposed on the side on which the first or second modulating portions are disposed, relative to the direction in which the optical wave propagates.
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公开(公告)号：US10401658B2
公开(公告)日：2019-09-03
申请号：US15504254
申请日：2015-08-31
发明人： Toshio Kataoka , Kei Kato , Junichiro Ichikawa
摘要： Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits an electrical signal along the flat surface; a second transmission line that is provided separately from the relay substrate, is electrically connected to the first transmission line, and transmits, to the first transmission line, the electrical signal that has been input from an outer side in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from the second transmission line.
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公开(公告)号：US10365506B2
公开(公告)日：2019-07-30
申请号：US15755735
申请日：2016-09-27
发明人： Kei Katou , Toshio Kataoka , Junichiro Ichikawa
摘要： Provided is an optical modulator in which a phenomenon of a resonance mode or the like is prevented from being generated in a recess portion of a housing that mounts a flexible printed circuit and of which broadband characteristics are improved.There is provided an optical modulator in which an optical modulation element is mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board 7 through a flexible printed circuit 6, and which is disposed on the external circuit board. A recess portion (area indicated with a dotted line D) that mounts the flexible printed circuit is formed on an outer bottom surface of the housing and at a part where the flexible printed circuit is connected, and means for preventing a resonance mode or the like (for example, a corrugated shape 21) is provided such that a resonance mode of a microwave and a millimeter wave or a parallel plate mode is prevented from being generated among a surface A of the recess portion facing the flexible printed circuit, an electric wiring part B provided on the flexible printed circuit overlapping the surface A when seen in a plan view, an electric wiring part C provided on the external circuit board overlapping the surface A when seen in a plan view.
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公开(公告)号：US10001602B2
公开(公告)日：2018-06-19
申请号：US15515895
申请日：2016-04-28
发明人： Tokutaka Hara , Toshio Kataoka
CPC分类号： G02B6/2773 , G02B6/024 , G02B6/2706 , G02B6/2766 , G02B27/283
摘要： Provided is a polarization-combining module in which it is possible to suppress deviation of an optical axis in a polarization-combining optical system and to perform efficient polarization combination with a less optical loss.A polarization-combining module includes: a PBS 4 which combines two linearly polarized lights input and emits the combined light; a λ/2 wavelength plate 3 which is provided on an optical path of at least one of the two linearly polarized lights which are input to the PBS 4, and provides polarization rotation by a predetermined angle to the linearly polarized light that passes therethrough; and a pedestal member 10 on which the λ/2 wavelength plate 3 and the PBS 4 are mounted, in which the pedestal member 10 has a protrusion part 12 which defines mounting positions of the λ/2 wavelength plate 3 and the PBS 4 so as to be separated from each other and be parallel to each other, and the λ/2 wavelength plate 3 and the PBS 4 are mounted on the pedestal member 10 with apart of each of the λ/2 wavelength plate 3 and the PBS 4 being brought into contact with the protrusion part 12.
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