公开(公告)号：WO2019034533A1

公开(公告)日：2019-02-21

申请号：PCT/EP2018/071651

申请日：2018-08-09

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： POEHLMANN, Wolfgang ,  BONK, Rene

IPC: H04B10/272 ,  H04B10/67 ,  H04B10/69

CPC classification number: H04B10/697 ,  H04B10/272 ,  H04B10/672 ,  H04B2210/256

Abstract: The present invention discloses a method of handling signals in an Optical Line Terminal, OLT, in an optical network, the method comprising:a) receiving a first optical signal from at least one Optical Network Unit, ONU, b) splitting the first optical signal in power onto a first number of branches, obtaining a second optical signal on each of the branches, the first number being a natural number no less than 2; c) feeding the second optical signals on each of the branches respectively to a photoreceiver, obtaining an electrical signal on each of the branches; d) selecting one of the electrical signals for further processing, wherein, the selected electrical signal has the biggest electrical power among the electrical signals, the electrical power of which is below a tolerated electrical power of the photoreceiver.

公开(公告)号：WO2003012488A2

公开(公告)日：2003-02-13

申请号：PCT/US2002/023943

申请日：2002-07-25

Applicant: XTERA COMMUNICATIONS, INC. ,  ISLAM, Mohammed, N. ,  DEWILDE, Carl, A. ,  FREEMAN, Michael, J.

Inventor： ISLAM, Mohammed, N. ,  DEWILDE, Carl, A. ,  FREEMAN, Michael, J.

IPC: G02B

CPC classification number: H04B10/2916 ,  H01S3/06754 ,  H01S3/094096 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/302 ,  H01S2301/02 ,  H04B10/2525 ,  H04B15/00 ,  H04B2210/003 ,  H04B2210/256

Abstract: One aspect of the invention includes an optical amplifier operable to amplify a plurality of optical wavelength signals at least in part through Raman amplification. The amplifier includes an input operable to receive a plurality of wavelength signals and an output operable to communicate an amplified version of at least some of the plurality of wavelength signals. The amplifier further includes a pump assembly operable to generate one or more pump signals and a gain medium operable to receive the plurality of wavelength signals and the one or more pump signals and to facilitate amplification of at least some of the plurality of wavelength signals. The amplifier has associated with it a noise figure having a shape varying as a function of wavelength. At least one of the one or more pump signals is operable to have its power varied to selectively control the shape of the noise figure.

Abstract translation: 本发明的一个方面包括一种光学放大器，其可操作以至少部分地通过拉曼放大来放大多个光波长信号。 放大器包括可操作以接收多个波长信号的输入和可操作以传送多个波长信号中的至少一些的放大版本的输出。 所述放大器还包括可组合产生一个或多个泵浦信号的泵组件和可操作以接收所述多个波长信号和所述一个或多个泵浦信号并促进所述多个波长信号中的至少一些波长信号的放大的增益介质。 放大器与其相关联，具有随波长变化的形状的噪声系数。 一个或多个泵浦信号中的至少一个可操作以使其功率变化以选择性地控制噪声系数的形状。

公开(公告)号：WO2004028056A1

公开(公告)日：2004-04-01

申请号：PCT/AU2003/001115

申请日：2003-08-29

Applicant: THE UNIVERSITY OF MELBOURNE ,  TRAN, An, Vu ,  TUCKER, Rodney ,  CHAE, Chang-Joon

Inventor： TRAN, An, Vu ,  TUCKER, Rodney ,  CHAE, Chang-Joon

IPC: H04J14/02

CPC classification number: H04B10/2971 ,  H04B10/2525 ,  H04B2210/256 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0216

Abstract: A bi-directional optical amplifier structure (10) is disclosed, the structure comprising a blocking, multi-port optical circulator (MOC) structure (12, 14), a unidirectional amplifier unit (16) optically connected in series between a first and second ports of the MOC structure, a first reflection filter (20) optically connected in series between a third and a fourth ports of the MOC structure and a second reflection filter (18) optically connected in series between a fifth and a sixth ports of the MOC structure. The amplifier structure (10) is arranged such that a first optical signal (λ EAST ) entering through a seventh port of the MOC structure passes through the first reflection filter (20) prior to be amplified in the amplifier unit (16) and is reflected at the second reflection filter (18) prior to exiting the amplifier structure (10) at an eighth port of the MOC structure, and such that a second optical signal (λ WEST ) entering through the eighth port of the MOC structure is reflected at the first reflection filter (20) prior to be optically amplified in the amplifier unit (16) and passes through the second reflection filter (18) prior to exiting the amplifier structure (10) at the seventh port. A bi-directional add/drop structure is also disclosed

Abstract translation: 公开了一种双向光放大器结构（10），该结构包括阻塞多端口光循环器（MOC）结构（12,14），单向放大器单元（16），其串联在第一和第二 MOC结构的端口，在MOC结构的第三和第四端口之间串联光学连接的第一反射滤光器（20）和在MOC的第五和第六端口之间串联光学连接的第二反射滤光器（18） 结构体。 放大器结构（10）被布置成使得通过MOC结构的第七端口进入的第一光信号（λEAST）在放大器单元（16）中被放大之前通过第一反射滤波器（20）并被反射在 第二反射滤光器（18），其在MOC结构的第八端口离开放大器结构（10）之前，并且使得通过MOC结构的第八端口进入的第二光信号（λWEST）在第一反射 滤波器（20），然后在第七端口离开放大器结构（10）之前在放大器单元（16）中被光学放大并通过第二反射滤波器（18）。 还公开了双向分插结构

公开(公告)号：WO03043249A8

公开(公告)日：2004-03-18

申请号：PCT/CN0200442

申请日：2002-06-26

Applicant: HUAWEI TECH CO LTD ,  CHEN JUAN ,  LI CHANGCHUN

Inventor： CHEN JUAN ,  LI CHANGCHUN

IPC: H04B10/294 ,  H04J14/02

CPC classification number: H04B10/2941 ,  H04B2210/256 ,  H04J14/0221

Abstract: The present invention discloses a implementation method for equalizing a power of densed wavelength division multiplex (DWDM) system, comprising the steps of: respectively measuring and calculating a gain spectral characteristic curve of a light power amplification unit in DWDM system and a loss spectrum characteristic of loss element of related wavelength in DWDM system; subtracting the loss spectrum characteristic of loss element of related wavelength from the gain spectral characteristic curve of a light power amplification unit, and taking a complementation curve of resulting difference curve as a loss characteristic target curve of a gain flat filter (GFF); placing the GFF conforming to loss characteristic target curve into the light power amplification unit. The invention determines the loss characteristic curve of which GFF should be to reach, on comprehensive consideration of the gain spectral of the light power amplification unit and the loss spectrum of the related wavelength's loss element of in wholly DWDM system, thereby effectively ensuring the light power flatness of each channel in the DWDM system, ensuring the flatness of overall system's transmission line, and therefore improving equalization performance of system's light power.

Abstract translation: 本发明公开了一种均衡波分多路复用（DWDM）系统的功率的实现方法，包括以下步骤：分别测量和计算DWDM系统中的光功率放大单元的增益谱特性曲线和损耗谱特性 DWDM系统相关波长损耗元件; 从光功率放大单元的增益光谱特性曲线中减去相关波长的损耗元素的损耗谱特性，并将得到的差分曲线的互补曲线作为增益平坦滤波器（GFF）的损耗特性目标曲线; 将符合损耗特性目标曲线的GFF放置到光功率放大单元中。 本发明通过综合考虑光功率放大单元的增益谱和全DWDM系统中相关波长损耗元素的损耗谱，确定了GFF应达到的损耗特性曲线，从而有效地保证了光功率 DWDM系统中每个通道的平坦度，确保整个系统传输线的平坦度，从而提高系统光功率的均衡性能。

公开(公告)号：WO2007104211A1

公开(公告)日：2007-09-20

申请号：PCT/CN2007/000090

申请日：2007-01-10

Applicant: 中兴通讯股份有限公司 ,  张立昆 ,  王加莹

Inventor： 张立昆 ,  王加莹

IPC: H04B10/18 ,  H04J14/02

CPC classification number: H04B10/25133 ,  H04B10/07951 ,  H04B2210/252 ,  H04B2210/254 ,  H04B2210/256 ,  H04J14/0221

Abstract: A wavelength division multiplexing system and the residual dispersion compensating device and method thereof, the residual dispersion compensating device (40) comprising: a performance parameter detection device (401), for receiving and detecting performance parameters of the optical signal at the receiving port, and transmitting the detecting result of performance parameters to a central control device; the central control device (402), for determining the dispersion adjusting mode of a tunable dispersion compensator based on the detecting result of performance parameters, and transmitting the dispersion adjusting mode to a tunable dispersion compensator control device via a control command; and the tunable dispersion compensator control device (403), for receiving the control command transmitted by the central control device and adjusting the dispersion compensating amount of the dispersion compensator based on the control command, thereby making residual dispersion of wavelength channels meet the dispersion tolerance requirements of the optical receiver.

公开(公告)号：WO2004100405A3

公开(公告)日：2005-05-19

申请号：PCT/FR2004001087

申请日：2004-05-06

Applicant: FRANCE TELECOM ,  HUI BON HOA DANIEL

Inventor： HUI BON HOA DANIEL

IPC: H04B10/2525 ,  H04B10/291 ,  H04J14/02 ,  H04B10/18

CPC classification number: H04B10/2525 ,  H04B10/2918 ,  H04B2210/256 ,  H04J14/0201

Abstract: The invention relates to chromatic dispersion compensation in a bidirectional optical transmission system. In order to compensate for optical dispersion in a bidirectional optical transmission system, optical devices (e.g. amplification module (10)) are provided, which comprise a single chromatic dispersion compensating module, with bidirectional transmission, and which act on the signals propagating in the two transmission directions. The bidirectional transmission over each line section is performed using pairs of unidirectionally-transmitting optical fibres. Moreover, polarisation-independent optical circulators (C1, C2) enable suitable optical signal switching. The compensating module can compensate for the half-sum of the chromatic dispersions of the two line sections connecting an amplification module (10) with the neighbouring amplification sites, or part of the chromatic dispersions (in order to under-compensate long sections and over-compensate long sections). An add/drop multiplexer with two optical signal add/drop modules also comprises two chromatic dispersion compensating elements, with bidirectional transmission, each being disposed between a respective line section and the two add/drop modules.

Abstract translation: 本发明涉及双向光传输系统中的色散补偿。 为了补偿双向光传输系统中的光学色散，提供了包括具有双向传输的单个色散补偿模块的光学装置（例如，放大模块（10）），并且其作用于在二维传播中的信号 传输方向。 通过使用单向发送光纤的对来执行每个线路部分上的双向传输。 此外，偏振无关的光循环器（C1，C2）可实现合适的光信号切换。 补偿模块可以补偿连接放大模块（10）与相邻放大位置或部分色散的两个线路段的色散的半数（为了补偿长的部分和过度补偿） 补偿长节）。 具有两个光信号分插模块的分插复用器还包括具有双向传输的两个色散补偿元件，每个色散补偿元件设置在相应的线段和两个分插模块之间。

公开(公告)号：WO2004100405A2

公开(公告)日：2004-11-18

申请号：PCT/FR2004/001087

申请日：2004-05-06

Applicant: FRANCE TELECOM ,  HUI BON HOA, Daniel

Inventor： HUI BON HOA, Daniel

IPC: H04B10/00

CPC classification number: H04B10/2525 ,  H04B10/2918 ,  H04B2210/256 ,  H04J14/0201

Abstract: Pour compenser la dispersion optique survenant dans un système optique à transmission bidirectionnelle, des dispositifs optiques (par exemple, module d'amplification (10)) sont prévus qui comportent un seul module de compensation de dispersion chromatique, à transmission bidirectionnelle, agissant sur les signaux se propageant dans les deux sens de transmission. La transmission bidirectionnelle sur chaque tronçon de ligne s'effectue au moyen de paires de fibres optiques à transmission unidirectionnelle. Des circulateurs optiques indépendants de la polarisation (C1, C2) permettent l'aiguillage approprié des signaux optiques. Le module de compensation peut compenser la demi-somme des dispersions chromatique des deux tronçons de ligne qui relient un module d'amplification (10) aux sites d'amplification voisins, ou bien une partie des dispersions chromatique (afin de sous-compenser des tronçons longs et de sur-compenser des tronçons longs). Un multiplexeur d'insertion/extraction comportant deux modules d'insertion/extraction de signaux optiques comporte aussi deux éléments de compensation de dispersion chromatique, à transmission bidirectionnelle, chacun étant disposé entre un tronçon de ligne respectif et les deux modules d'insertion/extraction.

Abstract translation: 本发明涉及双向光传输系统中的色散补偿。 为了补偿双向光传输系统中的光学色散，提供了包括具有双向传输的单个色散补偿模块的光学装置（例如，放大模块（10）），并且其作用于在二维传播中的信号 传输方向。 通过使用单向发送光纤的对来执行每个线路部分上的双向传输。 此外，偏振无关的光循环器（C1，C2）可实现合适的光信号切换。 补偿模块可以补偿连接放大模块（10）与相邻放大位置或部分色散的两个线路段的色散的半数（为了补偿长的部分和过度补偿） 补偿长节）。 具有两个光信号分插模块的分插复用器还包括具有双向传输的两个色散补偿元件，每个色散补偿元件设置在相应的线段和两个分插模块之间。

公开(公告)号：WO2017033438A1

公开(公告)日：2017-03-02

申请号：PCT/JP2016/003762

申请日：2016-08-18

Applicant: 日本電気株式会社

Inventor： 稲田　浩志

IPC: H04B10/294

CPC classification number: H04B10/294 ,  H04B10/2507 ,  H04B2210/256 ,  H04J14/0221 ,  H04Q11/02

Abstract: 波長分割多重光信号の特性やＥＤＦＡの使用環境等に応じて損失波長特性を容易に調整可能とするために、イコライザ１０は、設定されている損失プロファイルを入力された波長分割多重光信号へ付加して出力する波長選択スイッチ部２０、および、取得した設定情報に基づいて波長選択スイッチ手段に損失プロファイルを設定する設定部３０を備え、設定情報は出力された波長分割多重光信号のスペクトラムを平坦化するための情報であることを特徴とする。

Abstract translation: 为了能够根据波分复用光信号的特性和EDFA等的使用环境容易地调整损耗波长特性，均衡器10设置有：波长选择开关单元20，其添加 损耗曲线被设置为输入的波分复用光信号，并输出; 以及设置单元30，其基于获得的设置信息将丢失曲线设置为波长选择开关装置。 设置信息是用于使输出的波分复用光信号的频谱变平的信息。

公开(公告)号：WO2007035948A2

公开(公告)日：2007-03-29

申请号：PCT/US2006037354

申请日：2006-09-22

Applicant: CORNING INC ,  KUKSENKOV DMITRI V ,  SALEHEEN HASAN I

Inventor： KUKSENKOV DMITRI V ,  SALEHEEN HASAN I

IPC: H04B10/00

CPC classification number: H04B10/299 ,  H04B2210/256

Abstract: An optical 2R regenerator includes a decreasing dispersion optical fiber (DDF), or a Raman pump, or both.

Abstract translation: 光学2R再生器包括递减色散光纤（DDF）或拉曼泵或两者。

公开(公告)号：WO99043107A1

公开(公告)日：1999-08-26

申请号：PCT/US1999/003509

申请日：1999-02-18

IPC: H01S3/067 ,  H01S3/30 ,  H04B10/17 ,  H04B10/18 ,  H01S3/06

CPC classification number: H04B10/2916 ,  H01S3/06758 ,  H01S3/302 ,  H01S2301/02 ,  H04B10/2525 ,  H04B2210/003 ,  H04B2210/256

Abstract: A dispersion compensating element, such as a dispersion compensating fiber, is provided between two erbium doped fiber segments of a two stage amplifier, and is pumped with light of sufficient wavelength to yield Raman amplification within the dispersion compensating fiber. As a result, optical loss of dispersion compensating fiber is reduced and the overall noise figure of the amplifier is improved.

Abstract translation: 在两级放大器的两个掺铒光纤段之间提供色散补偿元件，例如色散补偿光纤，并用足够波长的光泵浦，以在色散补偿光纤内产生拉曼放大。 结果，减小了色散补偿光纤的光损耗，并提高了放大器的总噪声系数。