公开(公告)号：US20230208548A1

公开(公告)日：2023-06-29

申请号：US17954388

申请日：2022-09-28

Applicant: FUJITSU LIMITED

Inventor： Atsushi Kiyama ,  NOBUYUKI FUKUCHI ,  Tomoaki WATANABE

IPC: H04J14/02 ,  H04Q11/00 ,  H04B10/296

CPC classification number: H04J14/0221 ,  H04J14/0212 ,  H04Q11/0005 ,  H04B10/296 ,  H04Q2011/0016

Abstract: An optical transmission device includes: a selector configured to select a wavelength of a signal to be transmitted to an optical transmission line and output a wavelength-multiplexed signal; an adjustor configured to control a power level of the wavelength-multiplexed signal; and a controller configured to control the adjustor or the selector, wherein the selector selects a wavelength of an optical signal in a second wavelength band different from an existing first wavelength band, and when the second wavelength band is added to or removed from the optical transmission line, the controller controls power of the wavelength-multiplexed signal in the second wavelength band at a slower speed than power control in the first wavelength band.

公开(公告)号：US20180358775A1

公开(公告)日：2018-12-13

申请号：US15774019

申请日：2015-11-19

Applicant: Mitsubishi Electric Corporation

Inventor： Hiroshi MIURA ,  Toshiyuki TOKURA

IPC: H01S3/13 ,  H01S3/131 ,  H01S3/0941 ,  H01S3/067 ,  H01S3/16

CPC classification number: H01S3/1305 ,  H01S3/0078 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/10015 ,  H01S3/1003 ,  H01S3/10069 ,  H01S3/1301 ,  H01S3/1312 ,  H01S3/1608 ,  H01S2301/04 ,  H04B10/0777 ,  H04B10/2931 ,  H04B10/296

Abstract: An optical amplifier is provided which can suppress, without measuring signal beam power at individual wavelengths, wavelength-dependence of gain with respect to a signal beam into which multiple signal beams having respective wavelengths different from each other are multiplexed. The optical amplifier (100) according to the present invention can suppress wavelength-dependence of gain by giving loss in accordance with a linear-loss slope to an amplified signal beam. The optical amplifier is provided with a variable tilt equalizer (11) for varying a loss slope value representing the slope of the loss slope and a tilt control unit (22) for controlling a loss slope value of the variable tilt equalizer.

公开(公告)号：US20180267266A1

公开(公告)日：2018-09-20

申请号：US15851261

申请日：2017-12-21

Applicant: Infinera Corp.

Inventor： Omer Faruk Yilmaz ,  Matthew Mitchell ,  Zhong Pan

IPC: G02B6/43 ,  G02B6/02 ,  G02B6/42 ,  H01S5/14 ,  H01S3/1055 ,  H04J14/02 ,  G02B6/293

CPC classification number: H04B10/073 ,  G02B6/02061 ,  G02B6/29322 ,  G02B6/29395 ,  G02B6/4202 ,  G02B6/4246 ,  G02B6/43 ,  H01S3/1055 ,  H01S5/141 ,  H04B10/07955 ,  H04B10/296 ,  H04J14/02 ,  H04J14/0212 ,  H04J14/0221 ,  H04Q11/0066 ,  H04Q2011/0016 ,  H04Q2011/0083

Abstract: A method is described in which a database is monitored. The database includes information specifying allocations of time periods in which a first optical carrier corresponding to a first optical channel will not be supplying encoded first data into output optical signals being transmitted from a first node to a second node. An idler carrier being amplified stimulated emission light having a frequency corresponding to the first optical channel is supplied into the output optical signals transmitted from the first node to the second node during the time periods in which the first optical carrier will not be supplying encoded first data into the output optical signals.

公开(公告)号：US20170111108A1

公开(公告)日：2017-04-20

申请号：US15129105

申请日：2015-03-20

Applicant: NEC Corporation

Inventor： Ryota ABE

IPC: H04B10/03 ,  H04J14/02 ,  H04B10/80

CPC classification number: H04B10/03 ,  H04B10/296 ,  H04B10/80 ,  H04B10/85 ,  H04J14/02 ,  H04J14/021 ,  H04J14/0221

Abstract: [Problem] To provide an optical transmission/reception device, an optical communication system, an optical communication method, and a program which are capable of securing the confidentiality of information included in an optical signal even when the optical signal is transferred to a device that is not an original transmission destination device.[Solution] This optical transmission/reception device is provided with: a wave separation unit for receiving a wavelength-multiplexed optical signal and separating the same into a plurality of optical signals; a plurality of reception units for receiving each of the plurality of optical signals separated by the wave separation unit; a plurality of output units for outputting optical signals differing in wavelength from each other; a control unit for requesting, in response to the inclusion in the received wavelength-multiplexed optical signal of an optical signal to which a prescribed process has been applied, that a prescribed change be applied to the optical signal outputted by at least one of the plurality of output units; and a wave combining unit for combining the plurality of optical signals outputted from the plurality of output units and outputting the combined signal.

公开(公告)号：US20170005727A1

公开(公告)日：2017-01-05

申请号：US15185227

申请日：2016-06-17

Applicant: FUJITSU LIMITED

Inventor： Yoshito KACHITA

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04B10/07955 ,  H04B10/2916 ,  H04B10/296 ,  H04J14/02

Abstract: A transmission loss measurement device includes: a first monitor configured to measure a first optical power of a specific wavelength among wavelength-multiplexed light amplified by a Raman amplifier according to a power of pump light, the wavelength-multiplexed light being transmitted to an optical transmission line; a second monitor configured to measure a second optical power of the specific wavelength among the wavelength-multiplexed light received from the optical transmission line; a storage device configured to store a procedure for calculate a transmission line loss; and a processor configured to execute the procedure by: calculating a gain by the Raman amplifier, based on the power of the pump light; calculating the transmission line loss based on the first optical power, the second optical power, and the gain by the Raman amplifier; and correcting the transmission line loss according to a change of a number of wavelengths of the wavelength-multiplexed light.

Abstract translation: 传输损耗测量装置包括：第一监视器，被配置为根据泵浦光的功率来测量由拉曼放大器放大的波分复用光中的特定波长的第一光焦度，所述波分复用光被传输到光传输 线; 第二监视器，被配置为测量从所述光传输线路接收的所述波分复用光中的所述特定波长的第二光功率; 存储装置，被配置为存储用于计算传输线损耗的过程; 以及处理器，被配置为通过以下方式执行该过程：基于所述泵浦光的功率计算所述拉曼放大器的增益; 基于第一光功率，第二光功率和拉曼放大器的增益计算传输线损耗; 以及根据波分复用光的波长数的变化来校正传输线损耗。

公开(公告)号：US09537599B2

公开(公告)日：2017-01-03

申请号：US14747728

申请日：2015-06-23

Applicant: FUJITSU LIMITED ,  FUJITSU TELECOM NETWORKS LIMITED

Inventor： Koji Bato ,  Tomoyuki Sakata ,  Tatsuro Kishida ,  Koji Matsunaga ,  Tatsuya Toyozumi ,  Yuichiro Sakane ,  Tomonori Yamada

IPC: H04B10/02 ,  H04J14/02 ,  H04B10/296 ,  H04Q11/00

CPC classification number: H04J14/0221 ,  H04B10/296 ,  H04Q11/0066

Abstract: An optical transmitter includes an amplifying unit, a monitor, an identifying unit, and a controlling unit. The amplifying unit amplifies an optical signal in which an optical packet signal is mixed in optical path signals. The monitor monitors power of the optical signal on an input stage and an output stage of the optical amplifying unit, respectively. The identifying unit identifies an optical packet signal section on the input stage side based on the monitoring result on the input stage side, and identifies an optical packet signal section on the output stage side based on the monitoring result on the output stage side. The controlling unit compares the power of the identified section on the input stage side with the power of the identified section on the output stage side, and controls an amplification factor of the amplifying unit based on a power difference resulting from the comparison.

Abstract translation: 光发射机包括放大单元，监视器，识别单元和控制单元。 放大单元放大其中光信号信号在光路信号中混合的光信号。 监视器分别监视光放大单元的输入级和输出级上的光信号的功率。 识别单元基于输入级侧的监视结果来识别输入级侧的光分组信号部分，并且基于输出级侧的监视结果来识别输出级侧的光分组信号部。 控制单元将输入级侧的识别部分的功率与输出级侧的识别部分的功率进行比较，并且基于由比较产生的功率差来控制放大单元的放大系数。

公开(公告)号：US09509113B2

公开(公告)日：2016-11-29

申请号：US14306774

申请日：2014-06-17

Applicant: Emilio Bravi

Inventor： Emilio Bravi

IPC: H04B10/29 ,  H04B10/296 ,  H01S3/067 ,  H04J14/02 ,  H04B10/2575 ,  H01S3/10 ,  H01S3/13 ,  H01S3/16

CPC classification number: H01S3/06754 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1306 ,  H01S3/1608 ,  H04B10/2575 ,  H04B10/296 ,  H04J14/0202

Abstract: Methods and systems for transient gain cancellation at an optical amplifier may involve generating saturating light that is introduced in a reverse direction to a transmission direction at a doped fiber amplification element. The doped fiber amplification element may amplify an input optical signal having a plurality of wavelengths as well as the saturating light. The saturating light may be regulated by a control circuit to counteract transient gain effects of add/drop events in the input optical signal. The saturated light may be filtered to achieve a desired spectral profile.

Abstract translation: 在光放大器处用于瞬态增益消除的方法和系统可以涉及产生在掺杂光纤放大元件沿与传输方向相反的方向引入的饱和光。 掺杂光纤放大元件可以放大具有多个波长的输入光信号以及饱和光。 饱和光可以由控制电路来调节，以抵消输入光信号中的加/减事件的瞬态增益效应。 饱和光可以被过滤以获得期望的光谱分布。

公开(公告)号：US09503188B2

公开(公告)日：2016-11-22

申请号：US14709150

申请日：2015-05-11

Applicant: Futurewei Technologies, Inc.

Inventor： Zhiping Jiang ,  Jian Zhong ,  Yan Cui

IPC: H04B10/00 ,  H04J14/08 ,  H01S3/00 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/079 ,  H04J14/02 ,  H01S3/13 ,  H04B10/296

CPC classification number: H04B10/2507 ,  H01S3/00 ,  H01S3/1301 ,  H04B10/0797 ,  H04B10/296 ,  H04J14/02

Abstract: An apparatus comprising a processor configured to calculate a noise figure of an optical amplifier for a plurality of selected wavelength channels in a partial-fill scenario that accounts for channel loading. The noise figure is calculated using a plurality of corresponding noise figure correction values at a plurality of wavelengths based on an effective number of channels.

公开(公告)号：US09287992B2

公开(公告)日：2016-03-15

申请号：US13688829

申请日：2012-11-29

Applicant: FUJITSU LIMITED

Inventor： Takehiro Fujita ,  Toshiki Honda

IPC: H04B10/08 ,  H04B10/572 ,  H04B10/079 ,  H04B10/296 ,  H04J14/02

CPC classification number: H04B10/572 ,  H04B10/0797 ,  H04B10/296 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0258 ,  H04J14/0272 ,  H04J14/0275

Abstract: A transmitter to be added or reduced turns ON/OFF an optical output. A relay station and a receiving terminal station acquire the amount of fluctuation of the optical output of the received signal light when the optical output of the added transmitter is turned ON and OFF. From the amount of fluctuation of the optical output, the number of wavelengths after the addition or reduction is acquired. Without an OSC signal, each station may be informed of the number of wavelengths. Therefore, the configuration for transmitting and receiving the OSC signal is not requested, thereby reducing the total cost, appropriately controlling the gain of the optical amplifier, and successfully maintaining transmission quality.

Abstract translation: 要添加或减少的发射器打开/关闭光输出。 当所附加的发射机的光输出为ON和OFF时，中继站和接收终端站获取接收信号光的光输出的波动量。 根据光输出的波动量，获取添加或减少后的波长数。 没有OSC信号，每个站可以被通知波长的数量。 因此，不要求用于发送和接收OSC信号的配置，从而降低总成本，适当地控制光放大器的增益，并且成功地保持传输质量。

公开(公告)号：US20160020866A1

公开(公告)日：2016-01-21

申请号：US14749013

申请日：2015-06-24

Applicant: FUJITSU LIMITED ,  FUJITSU TELECOM NETWORKS LIMITED

Inventor： Koji BATO ,  TOMOYUKI SAKATA ,  Tatsuro Kishida ,  Koji Matsunaga ,  Tatsuya Toyozumi ,  Yuichiro Sakane ,  Wataru Kawasaki

IPC: H04J14/02 ,  H04J14/06 ,  H04Q11/00

CPC classification number: H04J14/0221 ,  H04B10/296 ,  H04J14/06 ,  H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0016 ,  H04Q2011/0083

Abstract: An optical transmitter includes a dummy optical source, a polarized wave beam coupler, and an auto gain control (AGC)-system amplifier. The dummy optical source outputs, out of an optical signal in which an optical path signal and an optical packet signal are mixed, a dummy signal having a wavelength identical to that of the optical packet signal. The polarized wave beam coupler multiplexes the dummy signal with the optical signal so that the dummy signal is orthogonal to the optical signal so as to output an output signal. The AGC-system amplifier inputs the output signal, and amplifies the output signal with a predetermined amplification factor corresponding to a power difference between input power and output power of an optical amplifier.

Abstract translation: 光发射机包括虚拟光源，偏振波束耦合器和自动增益控制（AGC）系统放大器。 虚拟光源从光路信号和光分组信号混合的光信号中输出具有与光分组信号的波长相同的波长的虚拟信号。 偏振波束耦合器将虚拟信号与光信号复用，使得伪信号与光信号正交，从而输出输出信号。 AGC系统放大器输入输出信号，并以对应于光放大器的输入功率和输出功率之间的功率差的预定放大系数放大输出信号。