公开(公告)号：US09735916B2

公开(公告)日：2017-08-15

申请号：US14494975

申请日：2014-09-24

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: H04J14/06 ,  H04B10/25 ,  H04B10/50 ,  H04B10/60 ,  H04B10/67

CPC classification number: H04J14/06 ,  H04B10/671

Abstract: An optical receiver includes: an optical brancher configured to branch polarization multiplexed light to a first polarization multiplexed light and a second polarization multiplexed light, the polarization multiplexed light in which a pilot signal is superimposed on at least one of a first polarization and a second polarization; an optical fiber configured to transmit the first polarization multiplexed light; a first polarization rotator configured to control a first polarization state of the first polarization multiplexed light output from the optical fiber; a first polarization separator configured to separate the second polarization multiplexed light into a third polarization and a fourth polarization; and a controller configured to control the first polarization rotator based on one of a first pilot signal included in the third polarization and a second pilot signal included in the fourth polarization.

公开(公告)号：US09831944B2

公开(公告)日：2017-11-28

申请号：US15074277

申请日：2016-03-18

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: H04B10/073 ,  H04B10/077 ,  H04B10/54 ,  H04J14/06

CPC classification number: H04B10/073 ,  H04B10/0775 ,  H04B10/541 ,  H04B2210/075 ,  H04J14/06

Abstract: A probe generator includes: a first demultiplexer configured to branch a first optical signal having a first wavelength into at least two first polarized optical signals; a first adjustor configured to adjust the first polarized optical signals such that the first polarized optical signals have the same polarization direction and to combine the adjusted first polarized optical signals into a second optical signal; a first modulator configured to branch the second optical signal into at least two first split optical signals and to intensity-modulate each of the first split optical signals with first pilot signals; a second adjustor configured to adjust the first split optical signals intensity-modulated by the first modulator such that the intensity-modulated first split optical signals have different polarization directions; and an output unit configured to combine the first split optical signals adjusted by the second adjustor to generate a probe optical signal to be output.

公开(公告)号：US09490896B2

公开(公告)日：2016-11-08

申请号：US14842999

申请日：2015-09-02

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/40 ,  H04B10/564

CPC classification number: H04B10/07955 ,  H04B10/0799 ,  H04B10/40 ,  H04B10/564

Abstract: An optical transceiver includes: a light source; a light source power management unit configured to manage a state of an output power of the light source; an optical detector configured to receive a first optical signal from a counterpart optical transmission apparatus and detect the first optical signal; and a monitoring information extraction unit configured to extract a monitoring information of a reception power level of a second optical signal, which is generated from an output light of the light source and received in the counterpart optical transmission apparatus, from the first optical signal, wherein the light source power management unit is configured to update a written value of the state of the output power of the light source in a case where a monitored value of the reception power level included in the monitoring information is decreased to exceed a variation of an optical transmission path.

Abstract translation: 光收发器包括：光源; 光源功率管理单元，被配置为管理所述光源的输出功率的状态; 光检测器，被配置为从对方光传输设备接收第一光信号并检测第一光信号; 以及监视信息提取单元，被配置为从所述第一光信号中提取从所述光源的输出光生成并在所述对方光发送装置中接收的第二光信号的接收功率电平的监视信息，其中， 光源功率管理单元被配置为在监视信息中包括的接收功率电平的监视值减小到超过光学变化的情况下，更新光源的输出功率的状态的写入值 传输路径。

公开(公告)号：US09306362B2

公开(公告)日：2016-04-05

申请号：US14620362

申请日：2015-02-12

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: H01S3/067 ,  G02F1/01 ,  G02F1/09 ,  H01S3/091

CPC classification number: H01S3/06758 ,  G02F1/0136 ,  G02F1/09 ,  G02F1/092 ,  G02F2203/60 ,  H01S3/091 ,  H01S3/094003 ,  H01S3/094061 ,  H01S3/094096 ,  H01S3/09415 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1608 ,  H01S2301/04 ,  H04B10/294 ,  H04B10/2941 ,  H04B2210/003

Abstract: An optical branching device includes: a Faraday rotator capable of controlling polarized wave of input light based on a change of a magnetic flux density depending on a magnetic field to be provided; a magnet configured to provide the Faraday rotator with the magnetic field; a polarization beam splitter configured to branch, by a polarized wave component, the input light which passes through the Faraday rotator; a bimetal configured to deform depending on a temperature; and a controller configured to have a mechanism to use force accompanying with the deformation of the bimetal so as to control a relative positional relationship between the Faraday rotator and the magnet.

Abstract translation: 光分路装置包括：法拉第转子，其能够根据要提供的磁场根据磁通密度的变化来控制输入光的偏振波; 配置为向法拉第转子提供磁场的磁体; 偏振分束器，被配置为通过偏振分量分支通过法拉第旋转器的输入光; 构造成根据温度变形的双金属; 以及控制器，被配置为具有使得伴随双金属变形的力的机构，以便控制法拉第转子和磁体之间的相对位置关系。

公开(公告)号：US10268101B2

公开(公告)日：2019-04-23

申请号：US14975258

申请日：2015-12-18

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: G02F3/00

Abstract: An optical logic circuit includes a NOT circuit. The NOT circuit reflects by fixed end reflection an data pulse input into the optical logic circuit which is an ON pulse of which a wavelength and an intensity are similar to a wavelength and an intensity of a standard optical pulse or an OFF pulse obtained by applying OFF modulation to the standard optical pulse. The NOT circuit multiplexes the reflected data pulse and the standard optical pulse and outputs the multiplexed pulse.

公开(公告)号：US09866344B2

公开(公告)日：2018-01-09

申请号：US14796047

申请日：2015-07-10

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: H04J14/02 ,  H04Q11/00 ,  G02F1/35 ,  H04B10/04 ,  H04B10/06 ,  H04B10/291

CPC classification number: H04J14/02 ,  G02F1/353 ,  G02F2203/585 ,  H04B10/291 ,  H04Q11/0005 ,  H04Q2011/0011 ,  H04Q2011/0016

Abstract: A frequency conversion device includes: an optical convertor configured to convert a source modulated light into an unmodulated light; and a frequency convertor configured to use the unmodulated light converted by the optical convertor as a reference light and convert the source modulated light into a modulated light that has a desirable frequency.

公开(公告)号：US09354483B2

公开(公告)日：2016-05-31

申请号：US14561778

申请日：2014-12-05

Applicant: FUJITSU LIMITED

Inventor： Futoshi Izumi

IPC: G02F1/295 ,  G02F1/35 ,  G02F1/29

CPC classification number: G02F1/3521 ,  G02F1/293 ,  G02F2203/52

Abstract: An optical limiter includes a nonlinear medium that changes its own refractive index in accordance with an intensity of incident light, and outputs the incident light in a different direction depending on the refractive index, a first incident section by which reference light with a predetermined intensity and an optical signal with a modulated intensity is made incident on the nonlinear medium, a second incident section by which auxiliary light is made incident on a portion in the nonlinear medium through which the reference light and the optical signal pass, and an inverse output section that is provided at an incident position of the reference light outputted from the nonlinear medium when the optical signal is off, and outputs an optical signal obtained by inversion of the intensity of the incident light.

Abstract translation: 光限制器包括根据入射光强度改变其自身折射率的非线性介质，并且根据折射率将不同方向的入射光输出，具有预定强度的参考光的第一入射部分和 具有调制强度的光信号入射到非线性介质上，第二入射部分通过辅助光入射到参考光和光信号通过的非线性介质中的一部分，以及反相输出部分， 设置在光信号关闭时从非线性介质输出的参考光的入射位置，并输出通过反射入射光的强度而获得的光信号。