公开(公告)号：US20240137673A1

公开(公告)日：2024-04-25

申请号：US18484882

申请日：2023-10-10

Applicant: NEC Corporation

Inventor： Akira MASUDA

IPC: H04Q11/00 ,  H04B10/077 ,  H04B10/294 ,  H04B10/50

CPC classification number: H04Q11/0005 ,  H04B10/0773 ,  H04B10/294 ,  H04B10/506 ,  H04Q2011/0041

Abstract: Provided is a path switching device including a wavelength separator that wavelength-separates signal light and monitoring light having a wavelength different from a wavelength of the signal light, a signal light path switcher that switches a path of the signal light, and a monitoring light path controller that controls a path of the monitoring light, wherein the monitoring light path controller sets a path of the monitoring light to one path regardless of a switching state of a path of the signal light.

公开(公告)号：US11835766B2

公开(公告)日：2023-12-05

申请号：US17771812

申请日：2020-09-11

Applicant: KOHOKU KOGYO CO., LTD.

Inventor： Toshihisa Okubo ,  Takashi Kato

IPC: G02B6/293 ,  H04B10/294 ,  G02B6/32

CPC classification number: G02B6/29361 ,  G02B6/32 ,  H04B10/294 ,  H04B10/2941 ,  G02B6/293 ,  G02B6/29362

Abstract: A slope gain equalizer that corrects a slope of a gain characteristic of an optical signal in a predetermined wavelength bandwidth. An interference filter, which allows insertion losses in a predetermined wavelength region to be inclined in opposite directions between a transmitting direction and a reflecting direction from a short wavelength side to a long wavelength side, is arranged between a dual-core fiber collimator and a single-core fiber collimator facing each other on an optical axis. An optical signal of a predetermined bandwidth inputted from a first or second optical fiber held by the dual-core fiber collimator is reflected by the interference filter and outputted from the second or the first optical fiber. An optical signal inputted from a third optical fiber held by the first optical fiber or the single-core fiber collimator is transmitted through the interference filter and outputted from the third or the first optical fiber.

公开(公告)号：US11664901B2

公开(公告)日：2023-05-30

申请号：US17541599

申请日：2021-12-03

Applicant: SubCom, LLC

Inventor： Sheng Zhang ,  Haifeng Li

IPC: H04B10/00 ,  H04B10/291 ,  H04J14/02 ,  H04B10/294 ,  H04J14/00

CPC classification number: H04B10/2912 ,  H04B10/294 ,  H04J14/0221

Abstract: A system and method for efficient optical signal amplification with system monitoring features are provided. For example, an optical repeater may include two different 4-port thin-film gain flattening filters (TF-GFFs), which may be connected to provide a high-loss loop-back (HLLB) path in the optical repeater for system monitoring. The 4-port TF-GFF may have four different ports and may integrate the functionalities of a conventional GFF and a coupler into a single component, thereby increasing power efficiency of the optical repeater.

公开(公告)号：US11664893B2

公开(公告)日：2023-05-30

申请号：US17699148

申请日：2022-03-20

Applicant: NEC Laboratories America, Inc.

Inventor： Yue-Kai Huang ,  Junqiang Hu

IPC: H04B10/07 ,  H04B10/079 ,  H04B10/294 ,  H04B10/69 ,  G02B6/02 ,  G01M11/00 ,  H04B10/071 ,  H04J14/02

CPC classification number: H04B10/07957 ,  G02B6/022 ,  H04B10/294 ,  H04B10/6932 ,  G01M11/3109 ,  H04B10/07 ,  H04B10/071 ,  H04J14/02

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously overcome problems encountered when operating DFOS systems over operational telecommunications facilities namely, cross-phase modulation, and uneven amplitude profiles through the use of a novel constant amplitude coded DFOS employing suppressed out-of-band signaling.

公开(公告)号：US10084544B2

公开(公告)日：2018-09-25

申请号：US15736065

申请日：2015-12-21

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Yuita Noguchi

IPC: H04J14/00 ,  H04B10/12 ,  H04B17/00 ,  H04B10/20 ,  H04B10/294 ,  H04J14/02 ,  H04J14/06 ,  H04B10/079 ,  H04B10/00

CPC classification number: H04B10/294 ,  H04B10/00 ,  H04B10/079 ,  H04J14/02 ,  H04J14/0212 ,  H04J14/0221 ,  H04J14/0275 ,  H04J14/06

Abstract: An optical relay device includes a WSS functioning as a wavelength selective switch capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and a control device that instructs, on the basis of a fluctuation amount of an optical level for each of the wavelengths of an optical signal output from the WSS and setting information indicating, for each of the wavelengths, whether optical level adjustment for the wavelengths of the optical signal is enabled, the WSS to perform a setting change of an optical level adjustment amount of the optical signal.

公开(公告)号：US20180261968A1

公开(公告)日：2018-09-13

申请号：US15912810

申请日：2018-03-06

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriquez ,  Takanori Inoue ,  Yoshihisa Inada

IPC: H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H04J14/02

CPC classification number: H01S3/0677 ,  H01S3/06766 ,  H01S3/06787 ,  H01S3/10007 ,  H01S3/1608 ,  H01S3/2383 ,  H01S2301/02 ,  H04B10/294 ,  H04B10/2972 ,  H04J14/02

Abstract: Aspects of the present disclosure describe systems, methods, and structures for providing C-band and L-band transmission exhibiting increased power efficiency by diverting a portion of C-band optical energy to an input of L-band optical amplifiers (C-seeding) while optionally employing circulators to eliminate the need for optical isolators.

公开(公告)号：US09722559B2

公开(公告)日：2017-08-01

申请号：US14426047

申请日：2012-09-27

Applicant: Accelink Technologies Co., Ltd.

Inventor： Chengpeng Fu ,  Cuihong Zhang ,  Tao Xiong ,  Menghui Le ,  Jintao Tao ,  Zhenyu Yu ,  Yunyu Jing ,  Qinlian Bu ,  Chunping Yu

IPC: H01S3/067 ,  H01S3/30 ,  H03G3/30 ,  H04B10/29 ,  H04B10/294 ,  H04B10/291 ,  H03F3/08 ,  H01S3/094 ,  H01S3/23

CPC classification number: H03G3/3084 ,  H01S3/06754 ,  H01S3/094096 ,  H01S3/2375 ,  H01S3/302 ,  H01S2301/04 ,  H03F3/08 ,  H03F3/087 ,  H04B10/2916 ,  H04B10/294

Abstract: A hybrid fiber amplifier and method of adjusting gain and gain slope of thereof. The hybrid fiber amplifier comprises: RFA and EDFA that does not comprise variable optical attenuator. The RFA comprises pump signal combiner, pump laser group, out-of-band narrow-band filter, and photodetector. The EDFA comprises input coupler, erbium-doped fiber, output coupler, input photodetector, and output photodetector that are connected in sequence. The hybrid fiber amplifier also comprises control module that coordinates and controls EDFA and/or RFA to adjust gain and/or the gain slope based on desired amplification requirements. The EDFA and/or RFA can be coordinated and controlled by using the control module to achieve desired amplification effect. In addition, the EDFA does not comprise the variable optical attenuator, which avoids problems caused by the variable optical attenuator. The hybrid fiber amplifier and method of adjusting gain and gain slope thereof are applicable to technical field of optical communications.

公开(公告)号：US09596028B2

公开(公告)日：2017-03-14

申请号：US14269408

申请日：2014-05-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianrui Han ,  Mingming Xu ,  Lei Shi ,  Lin Tan

IPC: H04B10/079 ,  H04J14/02 ,  H04B10/294

CPC classification number: H04B10/07955 ,  H04B10/294 ,  H04J14/0221 ,  H04J14/0282

Abstract: The present invention discloses a method and a controller for commissioning a wave division multiplexing optical network during capacity expansion. The method includes: calculating, according to a preset rule, initial power of a wavelength service to be added and adding one or more wavelength services according to the initial power; detecting power of each newly-added wavelength service in transmission and separately calculating target power of each newly-added wavelength service according to a detected value and the initial power; calculating end-to-end performance of an existing wavelength service and end-to-end performance of each newly-added wavelength service when each newly-added wavelength service reaches its respective target power; and adjusting the power of each newly-added wavelength service when each newly-added wavelength service reaches its respective target power and the end-to-end performance of the existing wavelength service and the end-to-end performance of each newly-added wavelength service meets their respective lowest threshold requirements.

Abstract translation: 本发明公开了一种在容量扩展期间调试波分复用光网络的方法和控制器。 该方法包括：根据预设规则，根据初始功率，计算要添加的波长业务的初始功率，并添加一个或多个波长业务; 检测传输中每个新添加的波长业务的功率，并根据检测值和初始功率分别计算每个新添加的波长业务的目标功率; 当每个新添加的波长服务达到其各自的目标功率时，计算现有波长业务的端到端性能和每个新添加的波长业务的端到端性能; 并且当每个新添加的波长业务达到其各自的目标功率和现有波长业务的端到端性能以及每个新添加的波长业务的端到端性能时，调整每个新添加的波长业务的功率 服务满足各自的最低门槛要求。

公开(公告)号：US20170054508A1

公开(公告)日：2017-02-23

申请号：US15233435

申请日：2016-08-10

Applicant: FUJITSU LIMITED

Inventor： Hideki Kobayashi ,  Jyunichi Ishiwatari

IPC: H04B10/50 ,  H04B10/275 ,  H04J14/02

CPC classification number: H04B10/50 ,  H04B10/275 ,  H04B10/2939 ,  H04B10/294 ,  H04J14/021

Abstract: There is provided an optical transmission device including: a first coupler to which an optical signal including an amplified spontaneous emission is input; a first filter configured to transmit the optical signal having a first frequency band from the first coupler; a first optical detector configured to detect an optical intensity of the optical signal transmitted through the first filter; a first port coupled to the first coupler; a second port configured to be coupled to the first port; a second coupler coupled to the second port; a second filter configured to transmit the optical signal having a second frequency band matching the first frequency band from the second coupler; and a reflector configured to reflect the optical signal from the second filter.

Abstract translation: 提供了一种光传输装置，包括：第一耦合器，输入包括放大的自发发射的光信号; 第一滤波器，被配置为从所述第一耦合器发送具有第一频带的所述光信号; 第一光学检测器，被配置为检测通过第一滤光器传输的光信号的光强度; 耦合到所述第一耦合器的第一端口; 被配置为耦合到所述第一端口的第二端口; 耦合到所述第二端口的第二耦合器; 第二滤波器，被配置为从所述第二耦合器发送具有与所述第一频带匹配的第二频带的所述光信号; 以及被配置为反射来自第二滤光器的光信号的反射器。

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。