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公开(公告)号：US20180284371A1
公开(公告)日：2018-10-04
申请号：US15893789
申请日：2018-02-12
发明人： Toshio Kataoka , Norikazu Miyazaki , Kei Kato
摘要： An optical element module includes a housing which houses an optical element, in which the optical element is optically coupled to an optical fiber introduced into the housing, the optical fiber is held by a fiber fixing part provided at the housing, the fiber fixing part includes, along a longitudinal direction thereof, a first tubular portion, a second tubular portion which is connected to a through-hole provided in the side wall of the housing and has an inner diameter substantially equal to an inner diameter of the through-hole and smaller than an inner diameter of the first tubular portion, and a tapered portion which continuously connects the first tubular portion and the second tubular portion, and the other end of a slit of the fiber fixing part reaches the tapered portion or the second tubular portion.
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公开(公告)号：US09778539B2
公开(公告)日：2017-10-03
申请号：US14780657
申请日：2014-02-25
CPC分类号： G02F1/2255 , G02F1/0123 , G02F2001/212
摘要： Provided is an optical waveguide element including a first interactive part, a first EO substrate line, a second interactive part, and a second EO substrate line. A relay substrate unit includes a first relay substrate line, a second relay substrate line, and a loss adjusting part. The loss adjusting part is provided to the relay substrate line in a combination in which an electrical loss is low so that an electrical loss in a combination of the first EO substrate line and the first relay substrate line, and an electrical loss in a combination of the second EO substrate line and the second relay substrate line become approximately the same as each other.
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公开(公告)号：US20160062155A1
公开(公告)日：2016-03-03
申请号：US14780525
申请日：2014-02-27
IPC分类号： G02F1/025
CPC分类号： G02F1/025 , G02F1/0316 , G02F1/0356 , G02F1/225 , G02F2001/0154 , G02F2201/063 , G02F2201/122 , G02F2201/128
摘要： An optical modulator has a ridge optical waveguide and a modulation electrode. The modulation electrode is composed of a signal electrode to which a modulation signal is supplied, a first ground electrode, and a second ground electrode, the signal electrode has a wide portion having a width wider than the width of the uppermost portion of the ridge optical waveguide, the first ground electrode has a central portion ground electrode component provided on a first surface so as to extend along a first direction, and the second ground electrode has a central portion ground electrode component provided on a second surface so as to extend along the first direction. The central portion ground electrode components respectively have a first and a second through-holes, and these through-holes overlap the wide portion of the signal electrode as seen in a planar view.
摘要翻译： 光调制器具有脊形光波导和调制电极。 调制电极由提供调制信号的信号电极，第一接地电极和第二接地电极构成，信号电极具有比脊状光学器件的最上部宽度宽的宽度 第一接地电极具有沿第一方向设置在第一表面上的中心部分接地电极部件，并且第二接地电极具有设置在第二表面上的中心部分接地电极部件，以沿着第一方向延伸 第一个方向 中心部分接地电极部件分别具有第一和第二通孔，并且如平面图所示，这些通孔与信号电极的宽部分重叠。
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公开(公告)号：US11109480B2
公开(公告)日：2021-08-31
申请号：US16261793
申请日：2019-01-30
发明人： Norikazu Miyazaki , Kei Katou , Toshio Kataoka
摘要： A transmission line has a signal electrode formed on one surface of a flexible printed circuit, and a ground electrode formed on the other surface of the flexible printed circuit. A connection terminal has signal terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through a via hole, and ground terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through the via hole. The signal terminal on the surface, on which the ground electrode is formed, is formed such that at least a width in an end portion on the transmission line side is narrower than a width of a part of the signal terminal on the surface, on which the signal electrode is formed, to be at the same position when the flexible printed circuit is seen in a plan view.
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公开(公告)号：US10514561B2
公开(公告)日：2019-12-24
申请号：US16360030
申请日：2019-03-21
发明人： Masayuki Motoya , Toshio Kataoka
摘要： An optical modulator includes a substrate, an optical waveguide, a control electrode applying a high frequency signal in order to modulate light waves propagating through the optical waveguide, and a relay substrate provided with a relay line to transfer the high frequency signal to the control electrode. The control electrode and the relay line together have a coplanar line structure inclusive of at least electrical connection portions of both the control electrode and the relay line. The control electrode includes an electrical connection portion and a routing portion positioned between the electrical connection portion and an active portion applying an electrical field to the optical waveguide. The routing portion has a coplanar line structure. A distance between ground electrodes sandwiching a signal electrode in the electrical connection portion of the control electrode is substantially equal to a distance between ground electrodes sandwiching a signal electrode of the routing portion.
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公开(公告)号：US10162201B2
公开(公告)日：2018-12-25
申请号：US15515831
申请日：2015-12-24
发明人： Norikazu Miyazaki , Toshio Kataoka , Youichi Hosokawa , Kei Katou
摘要： Provided is an optical modulator in which low-voltage drive and a stable modulation characteristic are secured over a wide bandwidth. An optical modulator includes: a substrate 10; an optical waveguide (not shown) formed in the substrate 10; a modulation electrode (a signal electrode 11 and a ground electrode 12) for modulating light waves propagating through the optical waveguide; and an external signal line (not shown, only a connection connector 4 is shown) which is provided outside the substrate and supplies a modulation signal to the modulation electrode, in which an impedance value of the modulation electrode in an active region S in which an electric field formed by the modulation electrode is applied to the optical waveguide is set to be lower than an impedance value of the external signal line, and an impedance adjustment part 21 having an impedance adjustment function with respect to mainly a modulation signal in a low-frequency area and configured of a lumped-constant circuit, and an impedance matching line L having an impedance adjustment function with respect to mainly a modulation signal in a high-frequency area are disposed between the external signal line and the active region of the modulation electrode.
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公开(公告)号：US20180284349A1
公开(公告)日：2018-10-04
申请号：US15893742
申请日：2018-02-12
发明人： Tokutaka Hara , Toshio Kataoka
CPC分类号： G02B6/262 , G02B6/2773
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：US09800349B2
公开(公告)日：2017-10-24
申请号：US14389426
申请日：2013-03-28
发明人： Yuji Hayami , Toshio Kataoka
CPC分类号： H04B10/6166 , H04B10/614 , H04J14/0221 , H04J14/06
摘要： An object of the present invention is to provide an optical 90-degree hybrid circuit which is capable of easily adjusting the optical power ratio between signal and local oscillator and suppresses an optical system of an optical receiver becoming complex and optical receivers using the same. The optical 90-degree hybrid circuit for demodulating multilevel phase-modulated signals corresponding to individual polarized waves by multiplexing an optical wave having a predetermined plane of polarization contained in signal and local oscillator that has the same wavelength as the signal and has been adjusted to circularly-polarized signal, and polarization-splitting the multiplexed signal includes polarization splitting means (polarization splitting) for extracting an optical wave having a predetermined plane of polarization from the signal, a polarization conversion element for rotating a plane of polarization of the optical wave extracted from the polarization splitting means, and a polarizer that determines a plane of polarization of the signal before multiplexing the signal with the local oscillator, and the polarization splitting means, the polarization conversion element, and the polarizer adjust intensity of the optical signal (VOA function) in cooperation with each other.
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公开(公告)号：US09551887B2
公开(公告)日：2017-01-24
申请号：US14780525
申请日：2014-02-27
CPC分类号： G02F1/025 , G02F1/0316 , G02F1/0356 , G02F1/225 , G02F2001/0154 , G02F2201/063 , G02F2201/122 , G02F2201/128
摘要： An optical modulator has a ridge optical waveguide and a modulation electrode. The modulation electrode is composed of a signal electrode to which a modulation signal is supplied, a first ground electrode, and a second ground electrode, the signal electrode has a wide portion having a width wider than the width of the uppermost portion of the ridge optical waveguide, the first ground electrode has a central portion ground electrode component provided on a first surface so as to extend along a first direction, and the second ground electrode has a central portion ground electrode component provided on a second surface so as to extend along the first direction. The central portion ground electrode components respectively have a first and a second through-holes, and these through-holes overlap the wide portion of the signal electrode as seen in a planar view.
摘要翻译： 光调制器具有脊形光波导和调制电极。 调制电极由提供调制信号的信号电极，第一接地电极和第二接地电极构成，信号电极具有比脊状光学器件的最上部宽度宽的宽度 第一接地电极具有沿第一方向设置在第一表面上的中心部分接地电极部件，并且第二接地电极具有设置在第二表面上的中心部分接地电极部件，以沿着第一方向延伸 第一个方向 中心部分接地电极部件分别具有第一和第二通孔，并且如平面图所示，这些通孔与信号电极的宽部分重叠。
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公开(公告)号：US10890788B2
公开(公告)日：2021-01-12
申请号：US16364449
申请日：2019-03-26
发明人： Hideki Ichimei , Toshio Kataoka
IPC分类号： G02F1/035
摘要： An optical waveguide device module includes an optical waveguide device and a connection substrate provided outside the optical waveguide device, and these are housed in a housing. The optical waveguide device has a control electrode including a signal electrode and ground electrodes disposed to interpose the signal electrode between the ground electrodes. A signal line, ground lines disposed so as to interpose the signal line between the ground lines, and a back surface ground electrode disposed on a surface of the connection substrate are provided on the connection substrate. The ground line and the back surface ground electrode are electrically connected through a via hole passing through the connection substrate. Electrical connection means for electrically connecting the ground line and the ground electrode is provided. A connection portion of the electrical connection means on the ground line side is in the vicinity of the via hole of the ground line.
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