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1. 发明申请

US20220086538A1 Wavelength Monitoring Device and Controlling Method Thereof 有权
公开(公告)号：US20220086538A1
公开(公告)日：2022-03-17
申请号：US17420639
申请日：2020-01-08
申请人： Nippon Telegraph and Telephone Corporation
发明人： Osamu Moriwaki , Takashi Saida , Kenya Suzuki , Takashi Go , Manabu Oguma , Yuichiro Ikuma
IPC分类号： H04Q11/00 , H04B10/572 , G02B6/293
摘要： A wavelength monitoring apparatus includes a wavelength monitoring circuit. The wavelength monitoring circuit includes: a split circuit that splits an input optical signal into two; an optical delay circuit that applies a delay time difference to the two split optical signals; and a two-input two-output optical multiplexer/demultiplexer circuit that outputs a result of applying multiplexing interference to the optical signals to which the delay time difference has been applied. The wavelength monitoring apparatus further includes photoelectric conversion elements that perform photoelectric conversions on the two optical signals output from the wavelength monitoring circuit so as to output electrical signals. The wavelength monitoring apparatus is configured to obtain the wavelength of the optical signal, by calculating a ratio between two electrical outputs of the photoelectric conversion elements and referring to a correspondence table indicating wavelengths of optical signals input to the wavelength monitoring circuit and ratios between electrical outputs.

2. 发明授权

US10649147B2 Optical module 有权
公开(公告)号：US10649147B2
公开(公告)日：2020-05-12
申请号：US16099955
申请日：2017-05-12
申请人： NTT Electronics Corporation , Nippon Telegraph and Telephone Corporation
发明人： Tomohiro Nakanishi , Teruaki Sato , Motohaya Ishii , Satoru Konno , Yuichi Suzuki , Shigeo Nagashima , Shinji Mino , Shuichiro Asakawa , Hiroshi Fukuda , Shin Kamei , Shunichi Soma , Ken Tsuzuki , Mitsuo Usui , Takashi Saida
IPC分类号： G02B6/30
摘要： An optical module that is connectable to an optical fiber array and that can be packaged in a high density. Two package modules are mounted on a board, and optical waveguides in a Si photonic lightwave circuit mounted on the package module are connected to an optical fiber array fixed to an optical fiber block. Moreover, output end surfaces of the optical waveguides in the Si photonic lightwave circuit are perpendicular to a mount surface of the package module. The optical waveguides in the Si photonic lightwave circuit may be tilted at an appropriate angle with respect to a direction perpendicular to a right end surface. Moreover, the optical fiber block fixes optical fibers with the optical fibers tilted with respect to a direction perpendicular to an end surface connected to the Si photonic lightwave circuit.

3. 发明授权

US10243664B2 Optical modulator driver circuit and optical transmitter 有权
公开(公告)号：US10243664B2
公开(公告)日：2019-03-26
申请号：US14889127
申请日：2014-05-09
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Munehiko Nagatani , Hideyuki Nosaka , Toshihiro Itoh , Koichi Murata , Hiroyuki Fukuyama , Takashi Saida , Shin Kamei , Hiroshi Yamazaki , Nobuhiro Kikuchi , Hiroshi Koizumi , Masafumi Nogawa , Hiroaki Katsurai , Hiroyuki Uzawa , Tomoyoshi Kataoka , Naoki Fujiwara , Hiroto Kawakami , Kengo Horikoshi , Yves Bouvier , Mikio Yoneyama , Shigeki Aisawa , Masahiro Suzuki
IPC分类号： H04B10/54 , H03F1/32 , H03F3/04 , H03F3/60 , H03G3/00 , H04B10/516 , H03F1/22 , H03F3/195 , H03F3/24 , H03F3/45 , H03G3/30 , H03F3/08 , H03G1/00
摘要： An optical modulator driver circuit (1) includes an amplifier (50, Q10, Q11, R10-R13), and a current amount adjustment circuit (51) capable of adjusting a current amount of the amplifier (50) in accordance with a desired operation mode. The current amount adjustment circuit (51) includes at least two current sources (IS10) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode.

4. 发明授权

US12107626B2 Wavelength monitoring device and controlling method thereof 有权
公开(公告)号：US12107626B2
公开(公告)日：2024-10-01
申请号：US17420639
申请日：2020-01-08
申请人： Nippon Telegraph and Telephone Corporation
发明人： Osamu Moriwaki , Takashi Saida , Kenya Suzuki , Takashi Go , Manabu Oguma , Yuichiro Ikuma
IPC分类号： H04B10/079 , G01J3/45 , G02B6/293 , H04B10/572 , H04Q11/00
CPC分类号： H04B10/07957 , G01J3/45 , G02B6/2935 , G02B6/2938 , G02B6/29385 , H04B10/572 , H04Q11/0005 , H04Q2011/0011 , H04Q2011/0015 , H04Q2011/0016
摘要： A wavelength monitoring apparatus includes a wavelength monitoring circuit. The wavelength monitoring circuit includes: a split circuit that splits an input optical signal into two; an optical delay circuit that applies a delay time difference to the two split optical signals; and a two-input two-output optical multiplexer/demultiplexer circuit that outputs a result of applying multiplexing interference to the optical signals to which the delay time difference has been applied. The wavelength monitoring apparatus further includes photoelectric conversion elements that perform photoelectric conversions on the two optical signals output from the wavelength monitoring circuit so as to output electrical signals. The wavelength monitoring apparatus is configured to obtain the wavelength of the optical signal, by calculating a ratio between two electrical outputs of the photoelectric conversion elements and referring to a correspondence table indicating wavelengths of optical signals input to the wavelength monitoring circuit and ratios between electrical outputs.

5. 发明授权

US09128348B1 Light modulation circuit 有权
标题翻译：光调制电路
公开(公告)号：US09128348B1
公开(公告)日：2015-09-08
申请号：US14418386
申请日：2013-09-26
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Hiroshi Yamazaki , Hiroshi Takahashi , Takashi Goh , Takashi Saida , Kiyofumi Kikuchi
IPC分类号： G02F1/035 , G02F1/225 , G02F1/21
CPC分类号： G02F1/225 , G02F1/0123 , G02F1/035 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/126 , G02F2201/16 , G02F2203/19 , H04B10/5051 , H04B10/588
摘要： An optical modulation circuit includes: a first Mach-Zehnder modulating portion including a first output port and a second output port, wherein the first Mach-Zehnder modulating portion is push-pull driven by a main signal; a second Mach-Zehnder modulating portion connected to the first output port of the first Mach-Zehnder modulating portion, wherein the second Mach-Zehnder modulating portion is push-pull driven by a correction signal; and an asymmetric light combining portion combining an optical signal outputted from an output port of the second Mach-Zehnder modulating portion with an optical signal outputted from the second output port of the first Mach-Zehnder modulating portion in a light intensity coupling ratio of r to 1−r, wherein an optical path length from the first output port to the asymmetric light combining portion is substantially equal to an optical path length from the second output port to the asymmetric light combining portion.
摘要翻译：光调制电路包括：第一马赫 - 曾德调制部分，包括第一输出端口和第二输出端口，其中第一马赫 - 策德尔调制部分由主信号驱动; 第二马赫 - 策德尔调制部分，连接到第一马赫 - 策德尔调制部分的第一输出端口，其中第二马赫 - 策德尔调制部分由校正信号驱动; 以及非对称光合成部，其将从所述第二马赫 - 策德尔调制部的输出端口输出的光信号与从所述第一马赫 - 策德尔调制部的所述第二输出端口输出的光信号的光强度耦合比率r 1-r，其中从第一输出端口到非对称光合成部分的光路长度基本上等于从第二输出端口到非对称光合并部分的光路长度。

6. 发明授权

US10317709B2 Optical modulator 有权
公开(公告)号：US10317709B2
公开(公告)日：2019-06-11
申请号：US15744208
申请日：2016-08-03
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Ken Tsuzuki , Takashi Saida , Koutaro Takeda , Kentaro Honda
IPC分类号： G02F1/025 , G02F1/225 , G02F1/21
摘要： An optical modulator that suppresses the chirp due to the mask offset, for example during the phase modulation, and that provides a high waveform quality includes: two RF electrodes for applying one pair of differential signal voltages; at least one fixed potential electrodes for applying a fixed potential; a first conductive semiconductor layer and a second conductive semiconductor layer abutted to the RF electrode or a fixed potential electrode; and a light modulation unit including two optical waveguides branched from one optical waveguide that are arranged along a pn junction unit functioning as a boundary between the first and second conductive semiconductor layers, wherein: the semiconductor layers and the electrode are provided so that the integration amounts of the phase changes caused by the offsets of the positions of the pn junction units in the two optical waveguides from a design value is equal between the two optical waveguides.

7. 发明授权

US10165690B2 Solder joint structure of flexible printed circuit board 有权
公开(公告)号：US10165690B2
公开(公告)日：2018-12-25
申请号：US15735726
申请日：2016-06-17
申请人： Nippon Telegraph and Telephone Corporation
发明人： Mitsuo Usui , Kiyofumi Kikuchi , Ken Tsuzuki , Hiroshi Fukuda , Shuichiro Asakawa , Shin Kamei , Shunichi Soma , Takashi Saida
IPC分类号： H05K1/11 , H05K3/36 , H05K1/14 , H05K1/18 , H05K3/34
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.

8. 发明申请

US20180239176A1 OPTICAL MODULATOR 审中-公开
公开(公告)号：US20180239176A1
公开(公告)日：2018-08-23
申请号：US15744208
申请日：2016-08-03
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Ken Tsuzuki , Takashi Saida , Koutaro Takeda , Kentaro Honda
IPC分类号： G02F1/025 , G02F1/225
CPC分类号： G02F1/025 , G02F1/225 , G02F1/2255 , G02F2001/212 , G02F2203/50
摘要： An optical modulator that suppresses the chirp due to the mask offset, for example during the phase modulation, and that provides a high waveform quality includes: two RF electrodes for applying one pair of differential signal voltages; at least one fixed potential electrodes for applying a fixed potential; a first conductive semiconductor layer and a second conductive semiconductor layer abutted to the RF electrode or a fixed potential electrode; and a light modulation unit including two optical waveguides branched from one optical waveguide that are arranged along a pn junction unit functioning as a boundary between the first and second conductive semiconductor layers, wherein: the semiconductor layers and the electrode are provided so that the integration amounts of the phase changes caused by the offsets of the positions of the pn junction units in the two optical waveguides from a design value is equal between the two optical waveguides.

9. 发明申请

US20150261059A1 LIGHT MODULATION CIRCUIT 有权
标题翻译：光调制电路
公开(公告)号：US20150261059A1
公开(公告)日：2015-09-17
申请号：US14418386
申请日：2013-09-26
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Hiroshi Yamazaki , Hiroshi Takahashi , Takashi Goh , Takashi Saida , Kiyofumi Kikuchi
IPC分类号： G02F1/225
CPC分类号： G02F1/225 , G02F1/0123 , G02F1/035 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/126 , G02F2201/16 , G02F2203/19 , H04B10/5051 , H04B10/588
摘要： An optical modulation circuit includes: a first Mach-Zehnder modulating portion including a first output port and a second output port, wherein the first Mach-Zehnder modulating portion is push-pull driven by a main signal; a second Mach-Zehnder modulating portion connected to the first output port of the first Mach-Zehnder modulating portion, wherein the second Mach-Zehnder modulating portion is push-pull driven by a correction signal; and an asymmetric light combining portion combining an optical signal outputted from an output port of the second Mach-Zehnder modulating portion with an optical signal outputted from the second output port of the first Mach-Zehnder modulating portion in a light intensity coupling ratio of r to 1-r, wherein an optical path length from the first output port to the asymmetric light combining portion is substantially equal to an optical path length from the second output port to the asymmetric light combining portion.
摘要翻译：光调制电路包括：第一马赫 - 曾德调制部分，包括第一输出端口和第二输出端口，其中第一马赫 - 策德尔调制部分由主信号驱动; 第二马赫 - 策德尔调制部分，连接到第一马赫 - 策德尔调制部分的第一输出端口，其中第二马赫 - 策德尔调制部分由校正信号驱动; 以及非对称光合成部，其将从所述第二马赫 - 策德尔调制部的输出端口输出的光信号与从所述第一马赫 - 策德尔调制部的所述第二输出端口输出的光信号的光强度耦合比率r 1-r，其中从第一输出端口到非对称光合成部分的光路长度基本上等于从第二输出端口到非对称光合并部分的光路长度。

10. 发明申请

US20140314366A1 OPTICAL MODULATOR 有权
标题翻译：光学调制器
公开(公告)号：US20140314366A1
公开(公告)日：2014-10-23
申请号：US14358362
申请日：2012-12-21
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Hiroshi Yamazaki , Takashi Saida , Takashi Goh
IPC分类号： G02F1/225 , G02F1/01
CPC分类号： G02F1/225 , G02F1/011 , G02F1/2255 , G02F1/2257 , G02F2001/212
摘要： An optical modulator comprises an input optical splitting unit for bifurcating input light; a final optical coupling unit for coupling optical signals in a polarization state orthogonal to each other; an intermediate optical coupling unit provided in an intermediate position between the input optical splitting unit and the final optical coupling unit; first and second optical paths for connecting the input optical splitting unit and the intermediate optical coupling unit, optical path lengths of the first and second optical paths are approximately equal; third and fourth optical paths for connecting the intermediate optical coupling unit and the final optical coupling unit, optical path lengths of third and fourth optical paths are approximately equal; and three binary phase modulation unit arranged one by one in each of the three optical paths of the first, second, third and fourth optical paths.
摘要翻译：一种光调制器，包括用于使输入光分叉的输入光分路单元; 用于耦合彼此正交的偏振状态的光信号的最终光耦合单元; 中间光耦合单元，设置在输入光分路单元和最终光耦合单元之间的中间位置; 用于连接输入光分路单元和中间光耦合单元的第一和第二光路，第一和第二光路的光路长度近似相等; 用于连接中间光耦合单元和最终光耦合单元的第三和第四光路，第三和第四光路的光路长度近似相等; 以及在第一，第二，第三和第四光路的三个光路中的每一个中逐个布置的三个二进制相位调制单元。

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