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公开(公告)号：US20230223738A1
公开(公告)日：2023-07-13
申请号：US18001007
申请日：2020-12-08
发明人： Seiji NAKANO , Norio OKADA
IPC分类号： H01S5/0239 , H01S5/02253 , H01S5/0231 , H01S5/02315 , H01S5/00
CPC分类号： H01S5/0239 , H01S5/02253 , H01S5/0231 , H01S5/02315 , H01S5/0085
摘要： A lead pin (2a,2b) penetrates a metal stem (1). A support block (3) is mounted on the metal stem (1). A dielectric substrate (4) is mounted on a side surface of the support block (3). A signal line (5a,5b) is formed on the dielectric substrate (4). One end of the signal line (5a,5b) is connected to the lead pin (2a,2b). A semiconductor optical modulation device (6) is mounted on the dielectric substrate (4). A conductive wire (8a,8b) connects the other end of the signal line (5a,5b) and the semiconductor optical modulation device (6). The semiconductor optical modulation device (6) includes a plurality of optical modulators (6b,6c) separated from each other.
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公开(公告)号：US20170227722A1
公开(公告)日：2017-08-10
申请号：US15283613
申请日：2016-10-03
发明人： Akio SHIRASAKI , Norio OKADA , Nobuo OHATA
CPC分类号： G02B6/4212 , G01J1/0271 , G01J1/4257 , G02B6/4204 , G02B6/4266 , H04B10/2504 , H04B10/502
摘要： An optical module includes: a stem; a temperature control module; a carrier; a light emitting element fixed on a light emitting element fixing surface of the carrier, having a front surface and a rear surface opposite to each other, emitting signal light from a first emission point in the front surface, and emitting back light from a second emission point in the rear surface; a light receiving element fixed on the carrier by a light receiving element fixing surface; a lens cap; and a lens, wherein a reflecting surface is provided on the carrier, the light receiving element receives the back light reflected by the reflecting surface, and a center of a light receiving surface of the light receiving element is positioned between the front surface and the rear surface in an optical axis direction of the signal light.
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公开(公告)号：US20150261016A1
公开(公告)日：2015-09-17
申请号：US14584457
申请日：2014-12-29
发明人： Norio OKADA , Tatsuki OTANI
CPC分类号： G02F1/0121 , G02F1/01 , G02F1/015 , G02F2202/10 , H03H5/12 , H03H7/38 , H03H7/40 , H03H11/28 , H04B1/0475 , H04B1/40 , H04B10/2504 , H04B10/2507 , H04B10/40 , H04B10/503 , H04B10/516 , H04B10/5161 , H04B10/548 , H04B10/556 , H04B10/5563 , H04B10/572 , H04B10/58 , H04B10/6164 , H04B10/671 , H04B15/00 , H04L25/0278 , H04L25/028 , H04L25/03343 , H04L25/10
摘要： A first resistor connected in parallel to a semiconductor optical modulator having first ends, the first resistor and first ends connected to a reference potential. A first end of a first transmission line is connected to second ends of the semiconductor optical modulator and the first resistor. A second transmission line is connected in series to the first transmission line and has an impedance lower than that of the first resistor. A first end of the second transmission line is connected to a second end of the first transmission line. A third transmission line is connected in series to the first and second transmission lines and has an end connected to a second end of the second transmission line, and has an impedance equal to that of the first transmission line. A second resistor and a capacitor are connected in series between the third transmission line and the reference potential.
摘要翻译： 与具有第一端的半导体光调制器并联连接的第一电阻器，所述第一电阻器和第一端部连接到参考电位。 第一传输线的第一端连接到半导体光调制器和第一电阻器的第二端。 第二传输线与第一传输线串联连接，阻抗低于第一传感器的阻抗。 第二传输线的第一端连接到第一传输线的第二端。 第三传输线与第一和第二传输线串联连接，并且一端连接到第二传输线的第二端，并具有等于第一传输线的阻抗的阻抗。 第二电阻器和电容器串联连接在第三传输线和参考电位之间。
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公开(公告)号：US20210257808A1
公开(公告)日：2021-08-19
申请号：US17275048
申请日：2018-11-21
发明人： Tatsuki OTANI , Norio OKADA
IPC分类号： H01S5/026 , H01S5/02345 , H01S5/042 , H01S5/00
摘要： The optical module which is disclosed in the present application comprises a plate-like metal stem in which a metallic lead pin is inserted in a through-hole so as to be coaxial with the through-hole and one sheet of a dielectric substrate which is equipped with a high-frequency signal line to be connected to the lead pin and a semiconductor optical integrated element, in which a semiconductor laser and an optical modulator are integrated, and which is connected to the high-frequency signal line with a bonding wire, wherein one side surface of the dielectric substrate extends in a direction perpendicular to the light axis direction of the semiconductor optical integrated element, and the side surface of the dielectric substrate is arranged in contact with a surface of the metal stem.
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公开(公告)号：US20220344895A1
公开(公告)日：2022-10-27
申请号：US17754328
申请日：2019-12-04
发明人： Kazuki YAMAJI , Norio OKADA
IPC分类号： H01S5/02212 , H01S5/0231 , H01S5/0235
摘要： This optical transmission module includes: a plurality of semiconductor lasers provided on a sub-mount fixed to a side surface of a block fixed on a plate-shaped stem made of metal; and a cap with a lens fixed thereto, the cap covering all members placed above the stem. The same number of lead pins as the semiconductor lasers are provided so as to respectively penetrate through a plurality of holes formed in the stem. The lead pins and the semiconductor lasers are electrically connected to each other, respectively. Single-phase electrical signals with the stem as a ground potential are respectively applied to the semiconductor lasers from an external power supply, through the lead pins, respectively, so as to cause modulation and oscillation of the semiconductor lasers.
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公开(公告)号：US20210218473A1
公开(公告)日：2021-07-15
申请号：US17053696
申请日：2018-05-29
发明人： Tatsuki OTANI , Akio SHIRASAKI , Norio OKADA
摘要： Provided is an optical module comprising a plate-like metal stem and a semiconductor optical modulation element mounted to a dielectric substrate provided on one side of the metal stem, wherein the metal stem has a metal stem penetration section in which a metal lead pin is inserted coaxially in a penetration hole which is formed in the metal stem and a dielectric member is provided to fill the penetration hole around the outer circumference of the lead pin, and a signal for modulation is supplied to the semiconductor optical modulation element connected in parallel with a terminal matching circuit, from the other side of the metal stem via the metal stem penetration section, wherein the terminal matching circuit is configured by a series connecting body which is comprised of a first resistor and a parallel body which is comprised of a second resistor and a capacitor.
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公开(公告)号：US20210184424A1
公开(公告)日：2021-06-17
申请号：US16771153
申请日：2018-02-09
发明人： Akio SHIRASAKI , Tatsuki OTANI , Norio OKADA
IPC分类号： H01S5/024 , H01S5/02253 , H01S5/02212
摘要： An optical module includes: a stem including a first surface and a second surface opposite to the first surface; a thermoelectric cooler including a heat-releasing substrate fixed to the first surface; a semiconductor laser element attached to the thermoelectric cooler; a cap fixed to the first surface and covering the thermoelectric cooler and the semiconductor laser element; a lens fixed to the cap; and a restriction body fixed to the second surface. The linear thermal expansion coefficients of the heat-releasing substrate and the restriction body are smaller than the linear thermal expansion coefficient of the stem.
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公开(公告)号：US20210006036A1
公开(公告)日：2021-01-07
申请号：US16969441
申请日：2018-04-16
发明人： Akio SHIRASAKI , Tatsuki OTANI , Norio OKADA
IPC分类号： H01S5/0683 , H01S5/024 , H01S5/022
摘要： An optical module includes a semiconductor laser element, a lens configured to collect emitted light that is emitted from the semiconductor laser element, a cap configured to hold the lens and hermetically seal the semiconductor laser element, a monitor light-receiving element configured to receive backlight of the semiconductor laser element, a transmission plate arranged between the semiconductor laser element and the monitor light-receiving element and configured to attenuate the backlight according to decrease in a temperature around the cap so as to cause the backlight to enter the monitor light-receiving element, and a control unit configured to control an injection current of the semiconductor laser element such that an output of the monitor light-receiving element is kept at a constant level.
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公开(公告)号：US20200059065A1
公开(公告)日：2020-02-20
申请号：US16346911
申请日：2016-11-29
发明人： Yudai IMAI , Norio OKADA , Shinichi KANEKO
摘要： A semiconductor laser (1) emits laser light. An electro-absorption optical modulator (2) modulates the laser light. The electro-absorption optical modulator (2) includes a plurality of electro-absorption regions (2a, 2b, 2c) having different extinction characteristics, whereby the extinction ratio curve of the optical device can be controlled to have a shape with multiple steps that is suited to driving conditions.
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