公开(公告)号：US10135525B2

公开(公告)日：2018-11-20

申请号：US15196381

申请日：2016-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yansui Huang ,  Enbo Zhou

IPC: H04B10/079 ,  H04J14/02 ,  H04B10/077 ,  H04B10/291

Abstract: The present invention provides a fiber-cut detection method, apparatus, and system. When a fiber cut occurs, power of input signal light decreases quickly at a fiber-cut location. When the fiber-cut location is relatively far away from an amplifier, pump light consumption of the input signal light in the remaining fiber reduces due to reduction of the input signal light, which causes an increase of remaining pump optical power in the fiber and an increase of an actual gain value of the amplifier. A gain-locking function of the amplifier works, which decreases pump power of the pump light and maintains a gain of the amplifier unchanged basically. Output optical power of the amplifier decreases quickly with decrease of input optical power, and when power of an output optical signal decreases to power that is lower than preset power of the output optical signal, it is determined that a fiber cut occurs.

公开(公告)号：US09712232B2

公开(公告)日：2017-07-18

申请号：US14872484

申请日：2015-10-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Demin Yao ,  Xiaodong Luo ,  Yansui Huang

IPC: H04B10/071 ,  G01M11/00 ,  H04B10/077

CPC classification number: H04B10/0775 ,  G01M11/00 ,  G01M11/3118 ,  H04B10/071

Abstract: An optical device with integrated Optical Time Domain Reflectometer (OTDR) functionality and method for the same is provided. The optical device includes a transmitter and an Optical Time Domain Reflectometer (OTDR) module, The transmitter is configured to generate an Optical Time Domain Reflectometer (OTDR)-modulated optical supervisory channel (OSC) signal by applying an OTDR modulation to an optical supervisory channel (OSC) signal using an OTDR signal and to transmit the OTDR-modulated OSC signal. The OTDR module is configured to generate the OTDR signal, to monitor a returned light signal, to determine transmitter noise compensation information, and to generate OTDR trace information using transmitter noise compensation information and the monitored returned light signal.

公开(公告)号：US20160277101A1

公开(公告)日：2016-09-22

申请号：US14872484

申请日：2015-10-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Demin Yao ,  Xiaodong Luo ,  Yansui Huang

IPC: H04B10/077 ,  H04B10/071

CPC classification number: H04B10/0775 ,  G01M11/00 ,  G01M11/3118 ,  H04B10/071

Abstract: An optical device with integrated Optical Time Domain Reflectometer (OTDR) functionality and method for the same is provided. The optical device includes a transmitter and an Optical Time Domain Reflectometer (OTDR) module, The transmitter is configured to generate an Optical Time Domain Reflectometer (OTDR)-modulated optical supervisory channel (OSC) signal by applying an OTDR modulation to an optical supervisory channel (OSC) signal using an OTDR signal and to transmit the OTDR-modulated OSC signal. The OTDR module is configured to generate the OTDR signal, to monitor a returned light signal, to determine transmitter noise compensation information, and to generate OTDR trace information using transmitter noise compensation information and the monitored returned light signal.

Abstract translation: 提供了具有集成光时域反射计（OTDR）功能的光学器件及其方法。 光学装置包括发射机和光时域反射计（OTDR）模块。发射机被配置为通过向光监控信道应用OTDR调制来产生光时域反射计（OTDR）调制的光监控信道（OSC）信号 （OSC）信号，并发送OTDR调制的OSC信号。 OTDR模块被配置为生成OTDR信号，监视返回的光信号，以确定发射机噪声补偿信息，并使用发射机噪声补偿信息和监视的返回光信号来产生OTDR跟踪信息。

公开(公告)号：US10135524B2

公开(公告)日：2018-11-20

申请号：US15687220

申请日：2017-08-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yansui Huang ,  Xiaodong Luo

IPC: H04B10/071

Abstract: A method for compensating for a signal error at a transmit end of an optical time domain reflectometer is provided. The method includes: detecting an actual signal sequence of a PN sequence sent by a transmitter to a measured optical fiber and an actual signal sequence of an optical signal and reflected back by the measured optical fiber and received by a receiver; obtaining a compensation value of the optical signal that attenuates in a process in which the optical signal is reflected by the measured optical fiber; computing an optical fiber attenuation curve function obtained through a current iteration; and determining, when determining that the optical fiber attenuation curve function obtained through the current iteration satisfies a given condition, performance of the measured optical fiber according to the optical fiber attenuation curve function obtained through the current iteration.

公开(公告)号：US10063314B2

公开(公告)日：2018-08-28

申请号：US15449133

申请日：2017-03-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaodong Luo ,  Yansui Huang ,  Ning Deng

IPC: H04B10/071 ,  H04J14/02

CPC classification number: H04B10/071 ,  G01M11/3118 ,  G01M11/3145 ,  H04J14/02

Abstract: An optical time domain reflectometer and a method for detecting an optical fiber are disclosed. In an embodiment the optical time domain reflectometer includes: a service signal generator, a signal coupler connected to the service signal generator, an electro-optical modulator connected to the signal coupler, a transmitter connected to the electro-optical modulator, a photoelectric detector connected to the transmitter, and an analog to digital converter connected to the photoelectric detector. The optical time domain reflectometer further includes: a digital signal processor, connected to the service signal generator, the signal coupler, and the analog to digital converter, and configured to generate compensation data and a PN code sequence, receive a sampled signal sent by the analog to digital converter, and calculate a first optical fiber function.

公开(公告)号：US09768582B2

公开(公告)日：2017-09-19

申请号：US15216415

申请日：2016-07-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yansui Huang ,  Enbo Zhou

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/13 ,  H04B10/079 ,  H01S3/131

CPC classification number: H01S3/1302 ,  H01S3/06754 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1306 ,  H01S3/1312 ,  H01S3/30 ,  H01S3/302 ,  H04B10/079 ,  H04B10/2916 ,  H04B10/2931

Abstract: The embodiments of the present invention disclose a method and an apparatus for determining a gain of a Raman optical amplifier and a Raman optical amplifier. The method includes: acquiring present gain parameter information of a Raman optical amplifier; and determining a present gain of a monitoring channel of the Raman optical amplifier according to the present gain parameter information and a correspondence between a gain of the monitoring channel of the Raman optical amplifier and gain parameter information. According to the method and apparatus for determining a gain of a Raman optical amplifier and the Raman optical amplifier that are in embodiments of the present invention, a present gain of a monitoring channel can be accurately determined; therefore, a gain spectrum of the Raman optical amplifier can be accurately monitored, and the gain of the Raman optical amplifier can be accurately adjusted to a target gain.

公开(公告)号：US20170180042A1

公开(公告)日：2017-06-22

申请号：US15449133

申请日：2017-03-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaodong Luo ,  Yansui Huang ,  Ning Deng

IPC: H04B10/071 ,  H04J14/02

CPC classification number: H04B10/071 ,  G01M11/3118 ,  G01M11/3145 ,  H04J14/02

Abstract: An optical time domain reflectometer and a method for detecting an optical fiber are disclosed. In an embodiment the optical time domain reflectometer includes: a service signal generator, a signal coupler connected to the service signal generator, an electro-optical modulator connected to the signal coupler, a transmitter connected to the electro-optical modulator, a photoelectric detector connected to the transmitter, and an analog to digital converter connected to the photoelectric detector. The optical time domain reflectometer further includes: a digital signal processor, connected to the service signal generator, the signal coupler, and the analog to digital converter, and configured to generate compensation data and a PN code sequence, receive a sampled signal sent by the analog to digital converter, and calculate a first optical fiber function.