公开(公告)号：US09363583B2

公开(公告)日：2016-06-07

申请号：US14142392

申请日：2013-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Jian Zhong

IPC: H04B10/2537 ,  H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0005 ,  H04B10/2537 ,  H04J14/0212 ,  H04J14/0221 ,  H04J14/0224 ,  H04J14/0272 ,  H04Q11/0066 ,  H04Q2011/0049 ,  H04Q2011/0083

Abstract: System, apparatus, and method embodiments are provided for suppressing the stimulated Raman scattering (SRS) crosstalk in multiple wavelength channel signals propagating in fiber links, such as in WDM/DWDM or other optical communications systems. The SRS is reduced or suppressed by separating the channels into two sets of different channels, such as even and odd channels, and then performing subtraction of signal amplitudes between the two sets of channels. The channels are separated by an interleaver into the two sets. Alternatively, a wavelength selective switch (WSS) is used to separate the channels into the two sets on which the subtraction of signal amplitudes is then performed. In an embodiment, the signals are low frequency modulation signals used for channel monitoring for optical communications systems.

Abstract translation: 提供了系统，装置和方法实施例，用于抑制在诸如WDM / DWDM或其他光通信系统中的光纤链路中传播的多个波长信道信号中受激拉曼散射（SRS）串扰。 通过将信道分离成两组不同的信道，例如偶数和奇数信道，然后在两组信道之间执行信号幅度的减法来减小或抑制SRS。 通道由交织器分成两组。 或者，使用波长选择开关（WSS）将信道分离成在其中执行信号幅度减法的两组中。 在一个实施例中，信号是用于光通信系统的信道监测的低频调制信号。

公开(公告)号：US20230224062A1

公开(公告)日：2023-07-13

申请号：US18175055

申请日：2023-02-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jun Luo ,  Zhiyong Feng ,  Jian Zhong

IPC: H04J14/02 ,  H04B10/079

CPC classification number: H04J14/0212 ,  H04B10/07955 ,  H04J14/0227

Abstract: This application discloses an optical signal control method and apparatus, and belongs to the optical communication field. The apparatus includes: a light source, configured to output a first optical signal; an optical switch module, configured to receive the first optical signal and an external second optical signal, and output a third optical signal; and a detection module, configured to detect whether a power change of the second optical signal on at least one wavelength channel is greater than a preset power change threshold, if so, the optical switch module adjusts on/off states of at least one wavelength channel of the received first optical signal and the at least one wavelength channel of the received second optical signal, so that an adjusted first optical signal and an adjusted second optical signal are combined to obtain the third optical signal.

公开(公告)号：US10659153B2

公开(公告)日：2020-05-19

申请号：US16504262

申请日：2019-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD

Inventor： Jian Zhong ,  Zhiping Jiang ,  Rui He

IPC: H04B10/077 ,  G01M11/00 ,  H04B10/27

Abstract: The application provides a method for measuring a dispersion coefficient of an optical fiber. A network device sends a first optical supervisory channel (OSC) measurement signal and a second OSC measurement signal, where wavelengths of the first OSC measurement signal and the second OSC measurement signal are different. The network device receives the returned first OSC measurement signal and second OSC measurement signal, where the first OSC measurement signal and the second OSC measurement signal are transmitted through a first optical fiber and a second optical fiber to return to the network device, and the first optical fiber and the second optical fiber are a to-be-tested optical fiber. The network device determines a delay difference between the received first OSC measurement signal and second OSC measurement signal. The network device determines a dispersion coefficient of the to-be-tested optical fiber based on the delay difference.

公开(公告)号：US09270370B2

公开(公告)日：2016-02-23

申请号：US14167359

申请日：2014-01-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Jian Zhong

IPC: H04B10/079 ,  H04B10/54 ,  H04B10/60 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/07955 ,  H04B10/0775 ,  H04B10/541 ,  H04B10/60 ,  H04B2210/075 ,  H04J14/0227 ,  H04Q11/0066 ,  H04Q2011/0083

Abstract: Embodiments are provided for applying pilot tone modulations to optical signals by introducing bias bits to data frames carried on the optical signals. Since the modulation is done by modifying data, the modulation depth is accurate, and there is no need for calibration or feedback control, which can improve power monitoring accuracy and simplify implementation. In an embodiment, a transmitter determines a period of a pilot tone modulation for tracking or identifying an optical channel. The transmitter inserts a sequence of bias bits, periodically according to the determined period, in a plurality of frames comprising original data bits. The amplitudes of the optical signals carrying the frames are modulated at a higher frequency than the pilot tone modulation. The optical signals are then transmitted including the bias bits within the frames.

Abstract translation: 提供了通过将偏移位引入到光学信号上承载的数据帧来将导频音调制应用于光信号的实施例。 由于调制是通过修改数据完成的，所以调制深度是准确的，不需要校准或反馈控制，这可以提高功率监控精度并简化实现。 在实施例中，发射机确定用于跟踪或识别光信道的导频音调制的周期。 发射机在包括原始数据比特的多个帧中根据所确定的周期周期性地插入一系列偏置比特。 承载帧的光信号的幅度以比导频音调制更高的频率进行调制。 然后发送光信号，包括帧内的偏置位。