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公开(公告)号：US20230136573A1
公开(公告)日：2023-05-04
申请号：US17889951
申请日：2022-08-17
Applicant: Fujitsu Limited
Inventor： Tomoyuki Akiyama , Takeshi Hoshida , Jun Matsui , Shinsuke Tanaka
Abstract: An optical analog-to-digital (AD) converter includes, wherein the optical AD converter converts an analog signal of information included in inputted signal light into a digital signal, and is formed of N stages corresponding to a number N of bits of the digital signal, optical waveguides configured to respectively guide the signal light, base light obtained by branching local light, and reference light obtained by branching the local light, a light receiver configured to detect and compare light levels of the signal light and the reference light, and output a binary comparison result, and an optical modulator configured to variably control a light level of the base light, based on the binary comparison result, in each stage of the N stages, wherein an output variably controlled of the optical modulator is multiplexed with the reference light of a next stage.
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公开(公告)号：US20170160499A1
公开(公告)日：2017-06-08
申请号：US15346781
申请日：2016-11-09
Applicant: FUJITSU LIMITED
Inventor： Jun Matsui , Tsuyoshi Yamamoto
CPC classification number: G02B6/4215 , G02B6/29361 , G02B6/32 , G02B6/4214
Abstract: An optical receiving device includes: a lens portion configured to refract incident light with a first wavelength and refract incident light with a second wavelength; a first beam splitter configured to let refracted light with the first wavelength transmit and reflect refracted light with the second wavelength; a second beam splitter configured to reflect transmitted light with the first wavelength; and a light receiver configured to receive reflected light with the first wavelength and reflected light with the second wavelength, wherein the first beam splitter and the second beam splitter are disposed so as to be separated by a difference in optical path length between the light with the first wavelength and the light with the second wavelength.
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公开(公告)号：US09507085B2
公开(公告)日：2016-11-29
申请号：US14515554
申请日：2014-10-16
Applicant: FUJITSU LIMITED
Inventor： Takashi Shimizu , Tsuyoshi Yamamoto , Jun Matsui , Eiji Yoshida
CPC classification number: G02B6/03694 , B29D11/00663 , B29K2995/0013 , C23C14/505 , G02B6/02395 , G02B6/4268 , G02B6/4296
Abstract: An optical fiber includes a core, a cladding, and a thermally conductive member. The cladding is formed in a surrounding of the core. The thermally conductive member is formed in a surrounding of the cladding and includes a thermal conductivity higher than thermal conductivities of the core and the cladding.
Abstract translation: 光纤包括芯，包层和导热构件。 包层形成在芯的周围。 导热构件形成在包层的周围，并且包括比芯和包层的热导率高的导热性。
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公开(公告)号：US20140369445A1
公开(公告)日：2014-12-18
申请号：US14219327
申请日：2014-03-19
Applicant: FUJITSU LIMITED
Inventor： Takashi Shimizu , Jun Matsui , Tsuyoshi Yamamoto
IPC: H04L27/06
CPC classification number: H04L27/06 , H04B7/0447
Abstract: A decision circuit includes: a first decision block to distinguish a first bit of bits using an amplitude of an analog signal as a discrimination point, the analog signal being an amplitude shift keyed signal; a superposition block to acquire an absolute value of a difference of the analog signal in respect to an amplitude center value of the analog signal by superposing divided analog signals; an inversion block to control inverting of the signal based on a first distinction result of the first decision block; a second decision block to distinguish a second bit of the bits based on an amplitude of an output signal from the inversion block and the discrimination point; and an output buffer to output the first distinction result and a second distinction result of the second decision block in synchronization with a clock.
Abstract translation: 判定电路包括：第一判定块，用于使用模拟信号的幅度来区分第一比特位作为鉴别点，所述模拟信号是幅移键控信号; 叠加块，通过叠加分割的模拟信号来获取相对于模拟信号的振幅中心值的模拟信号的差的绝对值; 反转块，用于基于第一判定块的第一区分结果来控制信号的反相; 第二判定块，用于基于来自反转块和所述鉴别点的输出信号的幅度来区分所述位的第二位; 以及输出缓冲器，用于与时钟同步地输出第一判别结果和第二判定块的第二区分结果。
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5.发明授权Apparatus for correcting signal, transmission apparatus, method of correcting signal, and transmission system 有权用于校正信号的装置，传输装置，信号校正方法和传输系统公开(公告)号：US09178691B2
公开(公告)日：2015-11-03
申请号：US14153169
申请日：2014-01-13
Applicant: FUJITSU LIMITED
Inventor： Takashi Shimizu , Jun Matsui , Tsuyoshi Yamamoto
IPC: H04L7/04 , H04B1/7073 , G06F13/40 , H04L7/00 , H04B15/04
CPC classification number: H04L7/04 , G06F13/40 , H04B1/7073 , H04B15/04 , H04L7/0008
Abstract: An apparatus for correcting a signal, includes a correction value calculator that determines a transmission distance of a transmission path through which a timing signal is propagated, the timing signal having a periodically changing frequency, and determines a deviation between a frequency of the timing signal and a frequency of received data, as a correction value, from the transmission distance; and a corrector that corrects the frequency of the timing signal by the correction value for synchronizing transmitted data with the timing signal.
Abstract translation: 一种用于校正信号的装置，包括校正值计算器，其确定传播定时信号的传输路径的传输距离，定时信号具有周期性变化的频率，并且确定定时信号的频率与定时信号的频率之间的偏差 从传输距离的接收数据的频率作为校正值; 以及校正器，其通过用于使发送的数据与定时信号同步的校正值校正定时信号的频率。
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Patent Agency Ranking
6.发明申请APPARATUS FOR CORRECTING SIGNAL, TRANSMISSION APPARATUS, METHOD OF CORRECTING SIGNAL, AND TRANSMISSION SYSTEM 有权用于校正信号，传输装置，校正信号的方法和传输系统的装置公开(公告)号：US20140269844A1
公开(公告)日：2014-09-18
申请号：US14153169
申请日：2014-01-13
Applicant: FUJITSU LIMITED
Inventor： Takashi Shimizu , Jun Matsui , Tsuyoshi Yamamoto
IPC: H04L7/00 , H04B1/7073 , H04L7/04
CPC classification number: H04L7/04 , G06F13/40 , H04B1/7073 , H04B15/04 , H04L7/0008
Abstract: An apparatus for correcting a signal, includes a correction value calculator that determines a transmission distance of a transmission path through which a timing signal is propagated, the timing signal having a periodically changing frequency, and determines a deviation between a frequency of the timing signal and a frequency of received data, as a correction value, from the transmission distance; and a corrector that corrects the frequency of the timing signal by the correction value for synchronizing transmitted data with the timing signal.
Abstract translation: 一种用于校正信号的装置，包括校正值计算器，其确定传播定时信号的传输路径的传输距离，定时信号具有周期性变化的频率，并且确定定时信号的频率与定时信号的频率之间的偏差 从传输距离的接收数据的频率作为校正值; 以及校正器，其通过用于使发送的数据与定时信号同步的校正值校正定时信号的频率。
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公开(公告)号：US11868026B2
公开(公告)日：2024-01-09
申请号：US17889951
申请日：2022-08-17
Applicant: Fujitsu Limited
Inventor： Tomoyuki Akiyama , Takeshi Hoshida , Jun Matsui , Shinsuke Tanaka
CPC classification number: G02F7/00 , G02F1/3137
Abstract: An optical analog-to-digital (AD) converter includes, wherein the optical AD converter converts an analog signal of information included in inputted signal light into a digital signal, and is formed of N stages corresponding to a number N of bits of the digital signal, optical waveguides configured to respectively guide the signal light, base light obtained by branching local light, and reference light obtained by branching the local light, a light receiver configured to detect and compare light levels of the signal light and the reference light, and output a binary comparison result, and an optical modulator configured to variably control a light level of the base light, based on the binary comparison result, in each stage of the N stages, wherein an output variably controlled of the optical modulator is multiplexed with the reference light of a next stage.
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公开(公告)号：US09904022B2
公开(公告)日：2018-02-27
申请号：US15346781
申请日：2016-11-09
Applicant: FUJITSU LIMITED
Inventor： Jun Matsui , Tsuyoshi Yamamoto
CPC classification number: G02B6/4215 , G02B6/29361 , G02B6/32 , G02B6/4214
Abstract: An optical receiving device includes: a lens portion configured to refract incident light with a first wavelength and refract incident light with a second wavelength; a first beam splitter configured to let refracted light with the first wavelength transmit and reflect refracted light with the second wavelength; a second beam splitter configured to reflect transmitted light with the first wavelength; and a light receiver configured to receive reflected light with the first wavelength and reflected light with the second wavelength, wherein the first beam splitter and the second beam splitter are disposed so as to be separated by a difference in optical path length between the light with the first wavelength and the light with the second wavelength.
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公开(公告)号：US09344309B2
公开(公告)日：2016-05-17
申请号：US14219327
申请日：2014-03-19
Applicant: FUJITSU LIMITED
Inventor： Takashi Shimizu , Jun Matsui , Tsuyoshi Yamamoto
CPC classification number: H04L27/06 , H04B7/0447
Abstract: A decision circuit includes: a first decision block to distinguish a first bit of bits using an amplitude of an analog signal as a discrimination point, the analog signal being an amplitude shift keyed signal; a superposition block to acquire an absolute value of a difference of the analog signal in respect to an amplitude center value of the analog signal by superposing divided analog signals; an inversion block to control inverting of the signal based on a first distinction result of the first decision block; a second decision block to distinguish a second bit of the bits based on an amplitude of an output signal from the inversion block and the discrimination point; and an output buffer to output the first distinction result and a second distinction result of the second decision block in synchronization with a clock.
Abstract translation: 判定电路包括：第一判定块，用于使用模拟信号的幅度来区分第一比特位作为鉴别点，所述模拟信号是幅移键控信号; 叠加块，通过叠加分割的模拟信号来获取相对于模拟信号的振幅中心值的模拟信号的差的绝对值; 反转块，用于基于第一判定块的第一区分结果来控制信号的反相; 第二判定块，用于基于来自反转块和所述鉴别点的输出信号的幅度来区分所述位的第二位; 以及输出缓冲器，用于与时钟同步地输出第一判别结果和第二判定块的第二区分结果。
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10.发明申请公开(公告)号：US20200036507A1
公开(公告)日：2020-01-30
申请号：US16520431
申请日：2019-07-24
Applicant: FUJITSU LIMITED
Inventor： Jun Matsui , Hisakatsu Yamaguchi
Abstract: A method includes transmitting a data signal generated by adjusting a phase of a data signal, receiving a control signal having a frequency lower than that of the data signal and used to control an apparatus of a transmission destination of the data signal, and applying, in a case where a signal level of the control signal is a level, jitter to the data signal by periodically changing a magnitude of an additional phase code to be added to a phase code representative of an adjustment amount for the phase but fixing, in a case where the signal level is a level different from the level, the additional phase code to 0, receiving the data signal and adjusting a phase of the data signal to generate a data signal and restoring the control signal from a phase code representative of an adjustment amount for the phase.
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