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公开(公告)号：US20220137478A1
公开(公告)日：2022-05-05
申请号：US17429268
申请日：2020-02-07
摘要： A optical modulator with reduced with a reduced amount of ripple is provided. A Mach-Zehnder optical modulator includes a phase modulation unit including optical waveguides having a PN junction structure and traveling wave electrodes, and a dummy phase modulation unit including portions of the traveling wave electrodes, the portions being obtained by forming the respective traveling wave electrodes longer than the phase modulation unit in the light propagation direction of the phase modulation unit, and optical waveguides having the same PN junction structure as that of the optical waveguides of the phase modulation unit and not connected to the optical waveguides of the phase modulation unit.
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公开(公告)号：US10601522B2
公开(公告)日：2020-03-24
申请号：US16309410
申请日：2017-06-19
发明人： Toshihiro Itoh , Yuriko Kawamura , Kiyofumi Kikuchi , Ken Tsuzuki , Hiroshi Fukuda , Shin Kamei
摘要： An optical receiver is configured so as to be as less susceptible to noise as possible even in the case where high noise occurs inside an optical transceiver. The optical receiver includes a connection part that connects two photodiodes (PDs) constituting a dual photodiode and a transimpedance amplifier (TIA), wherein signal lines from the dual photodiode are surrounded by a conductor pattern that is not connected to each of the signal lines for each channel, and the conductor pattern is connected to a ground pattern on the transimpedance amplifier or a power source pattern for the PDs.
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公开(公告)号：US10295744B2
公开(公告)日：2019-05-21
申请号：US15568610
申请日：2016-05-27
发明人： Shin Kamei , Makoto Jizodo , Hiroshi Fukuda , Kiyofumi Kikuchi , Ken Tsuzuki
摘要： A coherent optical mixer circuit is provided that can measure a phase error without requiring a step of cutting away a delay circuit. Odd-numbered or even-numbered two of four inputs of an 4-input-and-4-output multimode interference circuit are connected to an input mechanism. The four outputs of the multimode interference circuit are all connected to an output mechanism to the exterior. Other two inputs of the multimode interference circuit are connected to two monitor waveguides. One of the monitor waveguide is longer than the other to configure a light delay circuit. The monitor waveguides constituting the light delay circuit are connected to the respective outputs of a 2-branched light splitter. The 2-branched light splitter has an input connected to a monitor light input mechanism from the exterior via a monitor input waveguide.
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公开(公告)号：US20190025615A1
公开(公告)日：2019-01-24
申请号：US16081328
申请日：2017-03-16
发明人： Yuriko Kawamura , Ken Tsuzuki , Kiyofumi Kikuchi
摘要： The MZ type optical modulator of the invention includes: a Si optical modulator including an input optical waveguide, two arm waveguides branching and guiding light input from the input optical waveguide, an output optical waveguide combining the light guided through the two arm waveguides and outputting the combined light, two signal electrodes for applying radio frequency signals that are arranged in parallel to the two arm waveguides respectively, and a DC electrode for applying a bias voltage that is provided between the two signal electrodes; and at least one ground electrode arranged in parallel to the two signal electrodes.
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公开(公告)号：US11340478B2
公开(公告)日：2022-05-24
申请号：US17294980
申请日：2019-12-05
摘要： Provided is an optical transmitter having improved frequency characteristics by controlling the band by using components constituting the optical transmitter. An optical transmitter including an optical modulator that includes a traveling-wave electrode and a terminating resistor, and an optical modulator driver configured to drive the optical modulator, in which a characteristic impedance of a transmission line connecting the optical modulator driver and the optical modulator is 20% or more higher than a characteristic impedance of the optical modulator, and an electrical length of the transmission line is 1/20 or more and ½ or less of a wavelength corresponding to a 3 dB band frequency of an electrical signal driving the optical modulator.
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公开(公告)号：US20210382249A1
公开(公告)日：2021-12-09
申请号：US17265953
申请日：2019-08-14
发明人： Yuriko Kawamura , Yusuke Nasu , Kiyofumi Kikuchi , Shunichi Soma
IPC分类号： G02B6/42
摘要： An optical module with optical fibers is intended to be able to be easily sucked and conveyed, and mounted on another substrate. An optical module of the present disclosure includes an optical device to which optical fibers are optically connected; and a carrier including a substrate and an adhesive layer formed at a surface of the substrate, and a part of the optical device and a part of the optical fibers are adhesively fixed on a surface of the adhesive layer. The optical device may include ball grid array shaped electrodes. The carrier may be provided with a plurality of holes.
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公开(公告)号：US10277271B2
公开(公告)日：2019-04-30
申请号：US15744193
申请日：2016-07-27
发明人： Kiyofumi Kikuchi , Hiroshi Fukuda , Takashi Saida , Shin Kamei , Ken Tsuzuki
IPC分类号： H04B3/32 , H01S5/022 , H01P3/08 , H01R13/6466 , H05K1/02
摘要： An optical module that suppresses crosstalk between high-frequency transmission lines includes at least one set of: an optical port; an optical processing circuit optically connected to the optical port; an electro-optical transducer optically connected to the optical processing circuit; two or more high-frequency transmission lines connected to the electro-optical transducer; and electrical ports connected to the high-frequency transmission lines, and includes a conductive cover block which is provided above the high-frequency transmission lines so as to at least partly cover the high-frequency transmission lines and which is grounded.
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公开(公告)号：US20180199445A1
公开(公告)日：2018-07-12
申请号：US15735726
申请日：2016-06-17
发明人： Mitsuo Usui , Kiyofumi Kikuchi , Ken Tsuzuki , Hiroshi Fukuda , Shuichiro Asakawa , Shin Kamei , Shunichi Soma , Takashi Saida
摘要： In a conventional soldering method, an FPC-side electrode pad and a package-side electrode pad are closely joined together with a solder layer, and the soldered state after a joining process has not been easily confirmed visually. The present invention provides a solder joint structure including a side face electrode which is formed on each of the side faces of the end parts of an FPC board and a package or PCB board that are to be soldered, extending vertically relative to the faces constituting each of electrode pads on the boards, and which introduces solder. On the side face electrodes of the board end parts, a part of solder that is formed continuously from the solder joint portion is visible and the state of the solder joint between the electrode pads on the two boards can be confirmed. The efficiency of solder joint tests can be improved.
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公开(公告)号：US20180198483A1
公开(公告)日：2018-07-12
申请号：US15744193
申请日：2016-07-27
发明人： Kiyofumi Kikuchi , Hiroshi Fukuda , Takashi Saida , Shin Kamei , Ken Tsuzuki
IPC分类号： H04B3/32 , H01R13/6466 , H01P3/08 , H05K1/02
CPC分类号： H04B3/32 , H01P3/081 , H01R13/6466 , H01S5/022 , H05K1/0228
摘要： An optical module that suppresses crosstalk between high-frequency transmission lines includes at least one set of: an optical port; an optical processing circuit optically connected to the optical port; an electro-optical transducer optically connected to the optical processing circuit; two or more high-frequency transmission lines connected to the electro-optical transducer; and electrical ports connected to the high-frequency transmission lines, and includes a conductive cover block which is provided above the high-frequency transmission lines so as to at least partly cover the high-frequency transmission lines and which is grounded.
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公开(公告)号：US20220066110A1
公开(公告)日：2022-03-03
申请号：US17420356
申请日：2020-01-07
发明人： Yuriko Kawamura , Yusuke Nasu , Kiyofumi Kikuchi , Shunichi Soma
摘要： An object is to easily convey by suction an optical module equipped with optical fibers having ends coupled to optical receptacles and mount the optical module on a substrate. An optical module according to the present invention includes an optical device to which optical fibers having ends coupled to optical receptacles are optically coupled and also includes a carrier composed of a substrate and adhesive layers formed on the upper and lower surfaces of the substrate. The optical device is bonded on the adhesive layer formed on the lower surface of the substrate. Part of the optical fibers and the optical receptacles are bonded on the adhesive layer formed on the surface of the substrate.
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