-
公开(公告)号：US20190324301A1
公开(公告)日：2019-10-24
申请号：US16088066
申请日：2017-04-03
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toru SUGAMATA
IPC: G02F1/035
Abstract: Provided is an optical modulator capable of effectively dispersing and releasing heat generated by termination resistors, improving the reliability of a termination substrate including the termination resistors, and reducing influence of heat on an optical waveguide. In an optical modulator including an optical waveguide substrate on which an optical waveguide is formed, a signal electrode is provided on the optical waveguide substrate for applying an electric field, a termination resistor terminating the signal electrode, and a termination substrate on which the termination resistor is disposed, at least a plurality of the termination resistors are provided for a single termination substrate, and for preventing heat generated by the termination resistor from being concentrated on a local portion in the termination substrate or conducted to the optical waveguide substrate, a ground electrode provided on the termination substrate and electrically connected to the termination resistor is formed to be thicker than 0.1 μm.
-
公开(公告)号：US20190098744A1
公开(公告)日：2019-03-28
申请号：US16086320
申请日：2016-09-15
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu MIYAZAKI , Ryo SHIMIZU , Toru SUGAMATA
Abstract: An optical modulator with FPC and optical transmission device using the same are provided. This optical modulator includes a flexible printed circuit which electrically connects the optical modulator to a circuit board. The flexible printed circuit has a substantially quadrilateral shape. A pad is formed on the flexible printed circuit along one side of the substantially quadrilateral shape so as to be electrically connected to the circuit board. In order to release the mechanical stress applied onto the side or the end portion of the flexible printed circuit and/or to prevent propagation of distortion generated in the side or the end portion, the flexible printed circuit has: a cutout or a notch provided in a direction from a part of at least one side toward the inside of the flexible printed circuit; and/or a curved portion connecting at least two adjacent sides.
-
公开(公告)号：US20180231806A1
公开(公告)日：2018-08-16
申请号：US15948812
申请日：2018-04-09
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Toru SUGAMATA
CPC classification number: G02F1/0123 , G02F1/0327 , G02F1/035 , G02F1/225 , G02F1/2257 , G02F2001/212 , G02F2201/12 , G02F2202/20
Abstract: A substrate (102) having a piezoelectric effect, optical waveguides (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
-
公开(公告)号：US20180059503A1
公开(公告)日：2018-03-01
申请号：US15685224
申请日：2017-08-24
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Norikazu MIYAZAKI , Toru SUGAMATA
CPC classification number: G02F1/2255 , G02F2001/212 , H04B10/501 , H04B10/516
Abstract: An optical modulator includes an optical modulation element including a plurality of signal electrodes and the like, a plurality of lead pins and the like for inputting radio frequency signals, and a relay substrate in which conductor patterns and the like that electrically connect the lead pins with the signal electrodes respectively are formed, the relay substrate is disposed so that a propagation direction of the radio frequency signals that have propagated through the lead pins is bent and guided to the conductor patterns, and the relay substrate is constituted so that widths of gaps between the plurality of conductor patterns in the optical modulator-side edge of the relay substrate is smaller than, preferably smaller than 50% of widths of gaps between the plurality of conductor patterns in the lead pin-side edge.
-
公开(公告)号：US20210199997A1
公开(公告)日：2021-07-01
申请号：US17105615
申请日：2020-11-26
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Kousuke OKAHASHI , Toru SUGAMATA
Abstract: An optical waveguide element is provided to effectively reduce an optical absorption loss of waveguide light which may occur at an intersecting part between an optical waveguide and an electrode without causing deterioration in optical characteristics and degradation of long-term reliability of the optical waveguide element. The optical waveguide element includes an optical waveguide formed in a substrate, and an electrode controlling optical waves propagated in the optical waveguide and having an intersecting part intersecting the optical waveguide thereabove. A portion of a resin layer is provided between the optical waveguide and the electrode in a portion of the substrate including the intersecting part. A corner of the resin layer on a side of the electrode is constituted to be a curve in a cross section in an extending direction of the electrode.
-
Patent Agency Ranking
公开(公告)号：US20200326605A1
公开(公告)日：2020-10-15
申请号：US16911573
申请日：2020-06-25
Applicant: Sumitomo Osaka Cement Co., Ltd.
Inventor： Toru SUGAMATA
Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
-
公开(公告)号：US20190204515A1
公开(公告)日：2019-07-04
申请号：US16231608
申请日：2018-12-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu MIYAZAKI , Toru SUGAMATA
Abstract: An optical modulator and an optical transmission device using the same are provided. The optical modulator includes an optical waveguide substrate where an optical waveguide is formed; a light modulation element, provided in the optical waveguide substrate and including a modulation electrode applying an electric field corresponding to a modulation signal to the optical waveguide; a terminal substrate, disposed near the light modulation element and including terminal resistors that terminate the modulation signal, wherein the optical waveguide substrate, the light modulation element and the terminal substrate are accommodated in a housing; and a heat dissipation auxiliary element, provided between the terminal resistors and the housing. A distance b between the terminal resistors and the heat dissipation element is set to be shorter than a distance a from the terminal resistors to an end on the side of the optical waveguide substrate of the terminal substrate.
-
公开(公告)号：US20170248804A1
公开(公告)日：2017-08-31
申请号：US15441733
申请日：2017-02-24
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toru SUGAMATA
CPC classification number: G02F1/0123 , G02F1/0327 , G02F1/035 , G02F1/225 , G02F1/2257 , G02F2001/212 , G02F2201/12 , G02F2202/20
Abstract: A substrate (102) having a piezoelectric effect, optical waveguide (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
-
公开(公告)号：US20190056633A1
公开(公告)日：2019-02-21
申请号：US16084236
申请日：2017-04-24
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu MIYAZAKI , Toru SUGAMATA
IPC: G02F1/225 , H04B10/532 , G02F1/035 , G02B6/293
CPC classification number: G02F1/2255 , G02B6/29352 , G02B2006/12142 , G02F1/035 , G02F1/0356 , G02F2001/212 , H04B10/532
Abstract: In an optical modulator including an FPC for performing electrical connection with an external circuit substrate, to maintain high light transmission quality by appropriately driving the optical modulator even when the reflection of a radio frequency signal occurs in a connection portion between the FPC and the main body of the optical modulator. Provided is an optical modulator including a flexible printed circuit for performing electrical connection with a circuit substrate, in which the flexible printed circuit includes at least one wire pattern for propagating a radio frequency signal, and the wire pattern includes at least one radio frequency attenuation portion for attenuating power of the radio frequency signal by a predetermined amount.
-
公开(公告)号：US20190041717A1
公开(公告)日：2019-02-07
申请号：US16073965
申请日：2016-08-30
Applicant: Sumitomo Osaka Cement Co., Ltd
Inventor： Toru SUGAMATA
CPC classification number: G02F1/2257 , G02B6/241 , G02B6/4256 , G02B6/4266 , G02F1/0356 , G02F2001/212
Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.017 seconds)
