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公开(公告)号：EP1635488B1
公开(公告)日：2013-09-18
申请号：EP05023970.6
申请日：1997-09-24
申请人： FUJITSU LIMITED
发明人： Miyauchi, Akira , Yamane, Kazuo , Kawasaki, Yumiko , Okano, Satoru, Fujitsu Hokkaido Digital Tech. Ltd.
CPC分类号： H04B10/25137 , H01L31/14 , H04B10/2543 , H04B2210/252 , H04B2210/256
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公开(公告)号：EP1585997A4
公开(公告)日：2009-06-03
申请号：EP02765891
申请日：2002-07-25
IPC分类号： G02F1/35 , H01S3/067 , H01S3/094 , H01S3/10 , H01S3/131 , H01S3/30 , H04B10/02 , H04B10/16 , H04B10/17 , H04B10/18 , H04B15/00 , H01S3/00
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094096 , H01S3/10015 , H01S3/1301 , H01S3/302 , H01S2301/02 , H04B10/2525 , H04B15/00 , H04B2210/003 , H04B2210/256
摘要： An optical amplifier (12(a)), operable to amplify a plurality of optical wavelength signals (116) at least in part through. Raman, amplification is disclosed. 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 (124(a)-124(n)) and a gain medium (120) operable to receive the 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.
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公开(公告)号：EP1737087A3
公开(公告)日：2008-05-14
申请号：EP06002745.5
申请日：2006-02-10
申请人： FUJITSU LIMITED
CPC分类号： H01S3/06754 , H01S3/0064 , H01S3/06725 , H01S3/06729 , H01S3/06758 , H01S3/094011 , H01S3/09415 , H01S2301/04 , H04B10/291 , H04B2210/003 , H04B2210/256
摘要： An optical amplifier that improves the quality of wavelength division multiplex (WDM) transmission by reducing four-wave mixing. An optical fiber (11) has positive chromatic dispersion in a signal band and is used as an optical amplification medium for amplifying a wavelength division multiplex (WDM) signal. An excitation section (12) inputs excitation light to the optical fiber. In order to actualize mismatching of phases of optical signals with different wavelengths to be propagated, the optical fiber has positive chromatic dispersion in a signal band by which there is a great difference between a signal frequency, being a frequency of a signal to be amplified, and a zero-dispersion frequency, being a frequency at which chromatic dispersion is zero. As a result, the optical fiber functions as an optical amplification medium in which four-wave mixing is suppressed.
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4.发明公开System and method for multi-channel mitigation of PMD/PDL/PDG 有权系统与Verfahren zur Verbesserung derpolarisationsabhängigenDispersion，DämpfungundVerstärkung
公开(公告)号：EP1507346A1
公开(公告)日：2005-02-16
申请号：EP04254519.4
申请日：2004-07-28
IPC分类号： H04B10/18
CPC分类号： H04B10/2569 , H04B2210/256
摘要： A system and method for multi-channel PMD/PDL/PDG mitigation, the system including polarization scramblers adapted to vary the state of polarization of an optical signal propagated through the system to effectively vary the polarization mode dispersion experienced by the signal during each burst-error-correcting-period of the forward error correction used in the system.
摘要翻译： 一种用于多通道PMD / PDL / PDG减轻的系统和方法，所述系统包括偏振加扰器，其适于改变通过系统传播的光信号的偏振状态，以有效地改变每个突发脉冲期间信号所经历的偏振模色散。 系统中使用的前向纠错的纠错周期。
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5.发明公开Interleaving bi-directional optical add/drop multiplexer 审中-公开Optischer Add / Drop-Multiplexer mit Bidirektionaler Verschachtelung
公开(公告)号：EP1363419A2
公开(公告)日：2003-11-19
申请号：EP03010921.9
申请日：2003-05-15
IPC分类号： H04J14/02
CPC分类号： H04B10/2971 , H04B2210/256 , H04J14/0208 , H04J14/0213 , H04J14/0216
摘要： A bi-directional optical add/drop multiplexer is provided comprising a first interleaver for outputting to a second end a forward optical signal that has been inputted through a first end connected to the optical fiber, and a backward optical signal to a second end that has been inputted through a third end; a second interleaver for interleaving the forward optical signal inputted through a first end and the backward optical signal inputted through a second end by wavelengths, and outputting the interleaved signal through a third end; an optical add/drop multiplexing unit for adding a selected channel to the interleaved optical signal or dropping a selected channel from the interleaved optical signal; a third interleaver for outputting a backward optical signal among the channel-modified optical signals inputted through a second end to the third end of the first interleaver through a first end, and a forward optical signal through a third end; and a fourth interleaver for outputting a backward optical signal inputted through a second end connected to an optical fiber to the second end of the second interleaver through a first end, and the forward optical signal inputted from the third interleaver to the second end.
摘要翻译： 提供了一种双向光分插复用器，包括：第一交织器，用于向第二端输出已经通过连接到光纤的第一端输入的正向光信号，以及反向光信号到具有 通过第三端输入; 第二交织器，用于交织通过第一端输入的正向光信号和通过第二端输入的反向光信号，并通过第三端输出交错信号; 用于将所选择的信道添加到交织的光信号或从交织的光信号中丢弃所选择的信道的光分插复用单元; 第三交织器，用于经由第一端输出通过第二端输入到第一交织器的第三端的信道修改光信号中的反向光信号，以及通过第三端的正向光信号; 以及第四交织器，用于通过第一端输出通过连接到光纤的第二端输入的反向光信号到第二交织器的第二端，以及从第三交织器输入到第二端的正向光信号。
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6.发明公开Wide-band erbium-doped fiber amplifier and wavelength division multiplexing optical transmission system 审中-公开Breitbandiger铒光纤激光器和WDM-optischesÜbertragungssystem
公开(公告)号：EP1351415A2
公开(公告)日：2003-10-08
申请号：EP03006194.9
申请日：2003-03-19
发明人： Hwang, Seong-Taek , Joo, Young-Hoon
CPC分类号： H04B10/291 , H01S3/067 , H04B2210/256 , H04B2210/258
摘要： An erbium-doped fiber amplifier and a wavelength division multiplexing optical transmission system equipped with the same are disclosed. The wavelength division multiplexing optical transmission system includes a transmission stage having a first C/L fiber amplifier for amplifying combined C and L-band optical signals, an optical repeater having at least one second C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a dispersion compensating fiber of a predetermined length for compensating dispersions of the amplified optical signals. The system also includes a reception stage having a third C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a receiver for separating the amplified optical signals from the third C/L fiber amplifier into C-band optical signals and L-band optical signals band by band and de-multiplexing the separated amplified optical signals.
摘要翻译： 公开了掺铒光纤放大器和配备其的波分复用光传输系统。 波分复用光传输系统包括具有用于放大组合C和L波段光信号的第一C / L光纤放大器的发射级，具有至少一个第二C / L光纤放大器的光中继器，用于放大从 预定长度的单模光纤和预定长度的色散补偿光纤，用于补偿放大的光信号的分散。 该系统还包括具有第三C / L光纤放大器的接收级，用于放大从预定长度的单模光纤传输的光信号，以及用于将放大的光信号与第三C / L光纤放大器分离成C 带式光信号和L波段光信号，并对分离的放大光信号进行解复用。
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公开(公告)号：EP0944188A3
公开(公告)日：2003-06-18
申请号：EP98117180.4
申请日：1998-09-10
申请人： FUJITSU LIMITED
CPC分类号： H04B10/2942 , H04B10/2912 , H04B10/2935 , H04B2210/003 , H04B2210/256 , H04J14/02
摘要： The object of the present invention is to provide an optical amplifying apparatus for collectively amplifying wavelength-division multiplexed signal lights, which can perform amplification in response to input signal light, whose power level is within a wide input dynamic range, without saturating, and which suppresses the influence of the wavelength dependency of gain thereof. Thus, this optical amplifying apparatus is composed of: three optical amplifying portions connected in cascade; an optical attenuating portion for controlling the level of signal light output from the optical amplifying portion provided in the post-stage by regulating the power level of signal light input to the optical amplifying portion provided in the middle stage; and a dispersion compensation fiber provided between the middle stage and post stage optical amplifying. A gain of each of the optical amplifying portions is controlled to be constant by an AGC circuit. As a result of providing the optical amplifying portions in a three-stage constitution, the gain of optical amplifying portion provided in the first stage can be set at a low value. Thus, even when a signal light having a high power level is input, the first stage optical amplifying portion does not saturate. Consequently, the gain is controlled to be constant.
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8.发明公开Apparatus and method for processing an optical signal 失效Verfahren und Vorrichtung zur optischen Signalverarbeitung
公开(公告)号：EP1291986A2
公开(公告)日：2003-03-12
申请号：EP02028006.1
申请日：1996-03-15
申请人： FUJITSU LIMITED
发明人： Kinoshita, Susumu
CPC分类号： H04B10/291 , H01S3/0064 , H01S3/0078 , H01S3/06712 , H01S3/06725 , H01S3/06754 , H01S3/06758 , H01S3/094003 , H01S3/094011 , H01S3/094015 , H01S3/094061 , H01S3/094076 , H01S3/09408 , H01S3/094096 , H01S3/0941 , H01S3/09415 , H01S3/1301 , H01S3/1608 , H01S3/302 , H01S2301/04 , H04B10/2525 , H04B10/2916 , H04B10/294 , H04B2210/003 , H04B2210/256
摘要： The invention relates to an apparatus, comprising a dispersion compensating fiber which receives an optical signal and amplifies the optical signal by Stimulated Raman Scattering generated therein, and which compensates a dispersion given to the optical signal due to transmission through an optical fiber transmission line; and an optical amplifier optically coupled to said dispersion compensating fiber, including a rare earth element doped optical fiber which further amplifies the optical signal received from the dispersion compensating fiber.
Moreover, the invention relates to a method of processing an optical signal, comprising the steps of: transmitting the optical signal in a dispersion compensating fiber); amplifying the optical signal by Stimulated Raman Scattering in the dispersion compensating fiber; further transmitting the optical signal in a rare earth element doped optical; and amplifying the further transmitted optical signal in the rare earth element doped optical fiber, and to a method for processing an optical signal, comprising: transmitting the optical signal through a dispersion compensating fiber to amplify the optical signal; compensating a dispersion given to the optical signal due to the transmission through an optical fiber transmission line; and generating Stimulated Raman Scattering within said dispersion compensating fiber by inputting pumping light to amplify the optical signal.摘要翻译： 本发明涉及一种装置，包括色散补偿光纤，其接收光信号并通过其中产生的受激拉曼散射放大光信号，并补偿由于通过光纤传输线的传输而给予光信号的色散; 以及光耦合到所述色散补偿光纤的光放大器，包括稀土元素掺杂光纤，其进一步放大从色散补偿光纤接收的光信号。 此外，本发明涉及一种处理光信号的方法，包括以下步骤：在色散补偿光纤中传输光信号; 通过色散补偿光纤中的受激拉曼散射放大光信号; 在稀土元素掺杂光学中进一步传输光信号; 并且在稀土元素掺杂光纤中放大进一步透射的光信号，以及放大光信号处理方法，包括：通过色散补偿光纤传输光信号以放大光信号; 补偿由于通过光纤传输线的传输而给予光信号的色散; 并通过输入泵浦光来放大光信号，在所述色散补偿光纤内产生受激拉曼散射。
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9.发明公开Optical amplifying apparatus for wavelength division multiplexed signals 有权OptischeVerstärkungseinrichtungfürWellenlängenmultiplexsignale
公开(公告)号：EP0944188A2
公开(公告)日：1999-09-22
申请号：EP98117180.4
申请日：1998-09-10
申请人： FUJITSU LIMITED
CPC分类号： H04B10/2942 , H04B10/2912 , H04B10/2935 , H04B2210/003 , H04B2210/256 , H04J14/02
摘要： The object of the present invention is to provide an optical amplifying apparatus for collectively amplifying wavelength-division multiplexed signal lights, which can perform amplification in response to input signal light, whose power level is within a wide input dynamic range, without saturating, and which suppresses the influence of the wavelength dependency of gain thereof. Thus, this optical amplifying apparatus is composed of: three optical amplifying portions connected in cascade; an optical attenuating portion for controlling the level of signal light output from the optical amplifying portion provided in the post-stage by regulating the power level of signal light input to the optical amplifying portion provided in the middle stage; and a dispersion compensation fiber provided between the middle stage and post stage optical amplifying. A gain of each of the optical amplifying portions is controlled to be constant by an AGC circuit. As a result of providing the optical amplifying portions in a three-stage constitution, the gain of optical amplifying portion provided in the first stage can be set at a low value. Thus, even when a signal light having a high power level is input, the first stage optical amplifying portion does not saturate. Consequently, the gain is controlled to be constant.
摘要翻译： 本发明的目的是提供一种用于共同放大波分复用信号光的光放大装置，其可以响应于功率水平处于宽输入动态范围内的输入信号光进行放大，而不饱和，并且哪个 抑制其增益的波长依赖性的影响。 因此，该光放大装置由以下三个组合：级联连接的三个光放大部分; 光衰减部分，用于通过调节输入到设置在中间级的光放大部分的信号光的功率电平来控制从后级中提供的光放大部分输出的信号光的电平; 以及设置在中间级和后级光放大之间的色散补偿光纤。 每个光放大部分的增益被AGC电路控制为恒定。 作为以三级结构提供光放大部分的结果，可以将设置在第一级中的光放大部分的增益设置为低值。 因此，即使当输入具有高功率电平的信号光时，第一级光放大部分也不饱和。 因此，增益被控制为恒定。
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公开(公告)号：EP0500733A1
公开(公告)日：1992-09-02
申请号：EP90917363.0
申请日：1990-10-22
CPC分类号： H04B10/5053 , G02F1/0327 , G02F1/225 , G02F2203/19 , H04B10/541 , H04B10/58 , H04B2210/256
摘要： Un système incorporant une paire de modulateurs Mach-Zehnder (164, 166) permettant d'effectuer la modulation d'amplitude d'un signal optique est décrit. Chacun des modulateurs est conçu pour supprimer des produits de distorsion d'ordre pair et développer des produits de distorsion de troisième ordre de signe opposé et d'égale valeur. Les sorties des deux modulateurs sont combinées dans un coupleur directionnel (155) supprimant sensiblement les produits de distorsion du second ordre au quatrième ordre.
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