公开(公告)号：US20220109509A1

公开(公告)日：2022-04-07

申请号：US17063224

申请日：2020-10-05

Applicant: ADVA Optical Networking SE

Inventor： Sorin Tibuleac ,  Steven Searcy ,  Sergey Burtsev

IPC: H04B10/69 ,  H04B10/293 ,  H04B10/077 ,  H04B10/297 ,  H04B17/336

Abstract: The present invention relates to a method for optimizing performance of a multi-span optical fiber network. Each span has an associated optical transmission fiber connected to an associated optical amplifier. Gain and output power of the associated optical amplifier are respectively controlled independently. An amplifier noise figure respectively depends on the gain of the associated optical amplifier, with each associated optical amplifier further connected to launch optical signals into a remainder of a corresponding optical transmission line. The method includes the steps of for each span, computing the amplifier noise figure and a non-linear noise generated in the span based on information about the span and using the computed amplifier noise figure and the computed non-linear noise to compute an optimum launch power, and optimizing performance of the multi-span optical fiber network based on the computed optimum launch powers of all spans.

公开(公告)号：US20210336700A1

公开(公告)日：2021-10-28

申请号：US17367531

申请日：2021-07-05

Applicant: NOVEC Solutions, Inc.

Inventor： Marvin W. Ward

IPC: H04B10/297

Abstract: The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-Band wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

公开(公告)号：US20210242943A1

公开(公告)日：2021-08-05

申请号：US17239872

申请日：2021-04-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shiyi CAO

IPC: H04B10/297 ,  H04B10/40 ,  H04B10/2537

Abstract: An optical signal processing method and apparatus. The method includes: obtaining a first sending signal, where the first sending signal is a signal that is sent by a first transmitter to a second receiver through a first optical fiber; determining estimation information of a backward optical signal based on the first sending signal; the backward optical signal is generated during transmission of the first sending signal, the backward optical signal is transmitted through at least one fiber section in the first optical fiber, and a transmission direction of the backward optical signal is opposite to a transmission direction of the first sending signal; and obtaining a second sending signal based on the estimation information of the backward optical signal. According to the embodiments, impact of the backward optical signal on effective signal transmission can be reduced, and a signal-to-noise ratio can be improved.

公开(公告)号：US10992446B2

公开(公告)日：2021-04-27

申请号：US16224773

申请日：2018-12-18

Applicant: ARRIS Enterprises LLC

Inventor： David B. Bowler ,  Clarke V. Greene ,  Lawrence Hrivnak ,  Samuel Francois ,  Xinfa Ma ,  Bruce C. Pratt

IPC: H04L5/14 ,  H01B11/18 ,  H03F1/02 ,  H04B3/38 ,  H04B3/44 ,  H04B3/54 ,  H04B10/297

Abstract: In one embodiment, a switched amplifier is provided to amplify a data transmission. The switched amplifier may use a control signal that is received via a control signal channel in a transmission cable. Also, the switched amplifier may detect signal power to determine whether the data transmission is received at one of a first port and a second port. Data transmissions via the data transmission channel occur in a first direction and a second direction in a same frequency range in a time division multiplex (TDD) mode. Also, the control signal and data transmission are diverted from the transmission cable that transmits a type of signal different from the control signal and the data transmission. The switched amplifier is controlled based on the control signal or the signal power detected. The amplified signal is diverted in the first direction or the second direction via the data transmission channel back to the transmission cable.

公开(公告)号：US20200381888A1

公开(公告)日：2020-12-03

申请号：US16640242

申请日：2018-08-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takayuki MIZUNO ,  Akira ISODA ,  Kohki SHIBAHARA ,  Mitsunori FUKUTOKU ,  Yutaka MIYAMOTO

IPC: H01S3/23 ,  H01S3/30 ,  H01S3/0941 ,  H01S3/094 ,  H01S3/067 ,  H01S3/16 ,  H04B10/297

Abstract: An optically amplified repeater system includes optical transmission paths, a multi-channel optical amplifier, one or more Raman amplification pumping light sources, and a wavelength multiplexer. The multi-channel optical amplifier includes K simultaneous pumping light sources, N optical amplification media, and one or more optical couplers, and simultaneously amplifies, with the K simultaneous pumping light sources, light intensities of optical signals that pass through the N optical amplification media and propagate through the optical transmission paths. Light intensities of the wavelength band of the optical signals is Raman amplified by the Raman amplification pumping light. A light intensity of the Raman amplification pumping light output from the one or more Raman amplification pumping light sources is determined in accordance with characteristic differences between the optical signals passing through the optical transmission paths.

公开(公告)号：US10469169B2

公开(公告)日：2019-11-05

申请号：US15843048

申请日：2017-12-15

Applicant: Northern Virginia Electric Cooperative

Inventor： Marvin W. Ward

IPC: H04B10/00 ,  H04B10/297

Abstract: The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-B and wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

公开(公告)号：US20190207679A1

公开(公告)日：2019-07-04

申请号：US15540289

申请日：2017-02-20

Applicant: Peter Avo Andrekson ,  Samuel Lars Ivar Olsson

Inventor： Peter Avo Andrekson ,  Samuel Lars Ivar Olsson

IPC: H04B10/112 ,  H04B10/297 ,  H04B10/50

Abstract: A free-space optical communication link is proposed that utilizes phase-sensitive amplification of the received optical signal at the input to the receiver portion of the link. The transmitter component of the FSO link generates an idler signal that is transmitted through free space with the original data signal and used at the PSA in conjunction with a pump wave to impart gain onto the received information signal. The PSA performs four-wave mixing (FWM) of the data, idler and pump to create the amplified data signal. In one embodiment, the pump wave used to generate the idler at the transmitter is sent through free space with the information and idler signals and used by the PSA to perform amplification. Alternatively, the PSA may use a co-located pump laser, in combination with the received idler signal, to perform the phase-sensitive amplification process.

公开(公告)号：US20190097727A1

公开(公告)日：2019-03-28

申请号：US16086683

申请日：2017-03-22

Applicant: NEC Corporation

Inventor： Satoshi MIKAMI

IPC: H04B10/291 ,  H04B10/297 ,  H04B10/077 ,  H04B10/035

Abstract: Provided is a signal loopback circuit which, in order to loop back a monitoring signal in a relay device for relaying optical signals of a plurality of wavelength bands, connects between a channel of first direction and a channel of second direction through which an optical signal of first wavelength band and an optical signal of second wavelength band are transmitted, wherein the signal loopback circuit is provided with a first coupler for branching the optical signal on the channel of first direction, a first filter for extracting at least one of a monitoring signal of first wavelength band and a monitoring signal of second wavelength band that are used in the channel of first direction from the optical signal branched by the first coupler, and a second coupler for causing the monitoring signal extracted by the first filter to be joined to the channel of the second direction.

公开(公告)号：US20050259990A1

公开(公告)日：2005-11-24

申请号：US10939410

申请日：2004-09-14

Applicant: Izumi Yokota

Inventor： Izumi Yokota

IPC: H04B10/00 ,  H04B10/27 ,  H04B10/29 ,  H04B10/297 ,  H04J14/02

CPC classification number: H04B10/2937

Abstract: An optical transmission system which permits transmission distance to be prolonged without using repeaters and yet ensures economical, high-quality optical transmission. A branch station performs non-repeated communication with an optical branching point and includes a light pumping section for causing pump light to enter an optical fiber through which a branched, receiving optical signal flows, to perform optical amplification by using the fiber as an amplification medium. An optical branching device includes an optical amplification section and an optical branching section. The optical amplification section redirects the pump light originated from the branch station and propagated through a line to the paired line through which an optical signal transmitted from the branch station flows, to excite an amplification medium inserted in the paired line and doped with active material for optical amplification and thereby amplify power of the optical signal transmitted from the branch station. The optical branching section branches the optical signal transmitted from the branch station and optical signals transmitted from other stations.

Abstract translation: 允许传输距离延长而不使用中继器并且确保经济，高质量的光传输的光传输系统。 分支站与光分支点进行非重复通信，并且包括：光泵浦部，其使泵浦光进入分支的接收光信号流过的光纤，通过使用该光纤作为放大介质进行光放大 。 光分支装置包括光放大部分和光分支部分。 光放大部分将来自分支站的泵浦光重定向并通过一条线传播到从分支站发送的光信号流过的成对线路，以激发插入成对线路中的放大介质并掺杂活性物质 光放大，从而放大从分支站发送的光信号的功率。 光分路部对从分支站发送的光信号和从其他站发送的光信号进行分支。

公开(公告)号：US20050220454A1

公开(公告)日：2005-10-06

申请号：US11093475

申请日：2005-03-30

Applicant: Hideki Okuno

Inventor： Hideki Okuno

IPC: H04B10/00 ,  H04B10/07 ,  H04B10/077 ,  H04B10/079 ,  H04B10/25 ,  H04B10/29 ,  H04B10/294 ,  H04B10/297 ,  H04B17/00 ,  H04B10/08

CPC classification number: H04B10/0771 ,  H04B2210/078 ,  H04B2210/08

Abstract: An optical transmission system capable of immediately stopping optical equipment which may emit a high-power output optical signal from the breaking point of a transmission line fiber. A control circuit has the first function of controlling an optical amplifier based on an optical supervisory channel received by an optical supervisory channel receiver. In addition, the control circuit has the second function of determining that the breaking of an optical fiber or the like has occurred when the strength of an optical supervisory channel received by an optical supervisory channel receiver is equal to or lower than a prescribed level and terminating the transmission of an optical signal through a line via the optical amplifier. With the second function, it is possible to prevent the emission of a high-power output optical signal from the breaking point of the optical fiber.

Abstract translation: 一种光传输系统，其能够立即停止可能从传输线光纤的断点发射大功率输出光信号的光设备。 控制电路具有基于由光监控信道接收机接收的光监控信道来控制光放大器的第一功能。 此外，当由光监控信道接收机接收的光监控信道的强度等于或低于规定的级别并且终止时，控制电路具有确定光纤等的断裂已经发生的第二功能 通过光放大器通过线路传输光信号。 利用第二功能，可以防止从光纤的断裂点发射大功率输出光信号。