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1.发明授权Suppression of double rayleigh backscattering and pump reuse in a raman amplifier 有权在拉曼放大器中抑制双重雷利反向散射和泵重新使用公开(公告)号：US06862132B1
公开(公告)日：2005-03-01
申请号：US09929738
申请日：2001-08-13
CPC分类号： H01S3/302 , H01S3/094015 , H01S3/094096 , H01S2301/02
摘要： Systems and methods for ameliorating double Rayleigh backscattering induced impairments are provided. Raman amplification is divided among two or more stages. Optical energy from a single counter-propagating pump may traverse multiple stages while optical energy at the frequency of the signal to be amplified is permitted to propagate in the forward direction only. In this way the pump power can be effectively distributed over the entire amplifier length. The scheme may be implemented in a simple configuration employing a closed circulator and a fiber Bragg grating. Multiple wavelength pump operation may be accommodated as well as either discrete or distributed Raman amplification.
摘要翻译： 提供了改善双瑞利后向散射诱发损伤的系统和方法。 拉曼放大分为两个或多个阶段。 来自单个反向传播泵的光能可以横越多个阶段，而被放大的信号的频率的光能仅允许沿正向传播。 以这种方式，泵功率可以在整个放大器长度上有效分布。 该方案可以采用采用封闭循环器和光纤布拉格光栅的简单配置来实现。 可以适应多波长泵操作以及离散或分布式拉曼放大。
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2.发明授权Automatic raman gain and tilt control for ultra-long-distance dense WDM optical communication system 失效超长距离密集WDM光通信系统的自动拉曼增益和倾斜控制公开(公告)号：US06961522B1
公开(公告)日：2005-11-01
申请号：US09717036
申请日：2000-11-22
CPC分类号： H04B10/2931 , H04B10/2916 , H04J14/0221
摘要： An approach for automatic Raman gain and tilt control for a WDM (Wavelength Division Multiplexing) optical communication systems is disclosed. An optical fiber carries a plurality of optical signals, in which at least one of the optical signals are reference signals. An optical gain unit (e.g., Raman pump unit) couples to the optical fiber and adjusts the reference signals to compensate, in part, for losses associated with the optical fiber and gain tilt accumulation. Upon detecting and analyzing the reference signals, a controller controls the optical gain unit and outputs a control signal to the optical gain unit based upon the analyzed reference signals. An optical amplifier is connected to the optical fiber and amplifies the optical signals. The optical gain unit provides a nearly constant power per channel at an input of the optical amplifier. Under this approach, a Raman gain control mechanism, combined with the use of gain controlled EDFA (Erbium Doped Fiber Amplifier), allows high transmission capacity over ultra-long distances without optical regeneration and with high flexibility.
摘要翻译： 公开了一种用于WDM（波分复用）光通信系统的自动拉曼增益和倾斜控制的方法。 光纤携带多个光信号，其中至少一个光信号是参考信号。 光增益单元（例如，拉曼泵单元）耦合到光纤并且调整参考信号以部分地补偿与光纤相关联的损耗和增益倾斜积累。 在检测和分析参考信号时，控制器控制光学增益单元，并且基于分析的参考信号向光学增益单元输出控制信号。 光放大器连接到光纤并放大光信号。 光学增益单元在光放大器的输入处提供每通道几乎恒定的功率。 在这种方法下，拉曼增益控制机制与增益控制EDFA（掺铒光纤放大器）结合使用，可实现超长距离的高传输容量，无需光学再生和高灵活性。
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3.发明授权Interleaved lumped raman amplifier structure based on highly nonlinear fibers for densely spaced WDM channels 有权基于高度非线性光纤的交错集中拉曼放大器结构，用于密集间隔的WDM通道公开(公告)号：US06657777B1
公开(公告)日：2003-12-02
申请号：US10006741
申请日：2001-12-05
IPC分类号： H04J1402
CPC分类号： H04B10/2916 , H01S3/06708 , H01S3/2383 , H01S3/302
摘要： A modular interleaved Raman amplifier structure is exploited to reap the advantages provided by the high Raman gain coefficient and small effective area of highly nonlinear fibers without incurring penalties caused by nonlinear effects and double-Rayleigh backscattering noise. Very tight WDM channel spacings may be accommodated. The amplifier structure may be implemented at very low initial cost and with high reliability, scalability, and modularity.
摘要翻译： 利用模块交错拉曼放大器结构，可以获得高拉曼增益系数和高非线性光纤有效面积的优势，而不会产生由非线性效应和双瑞利后向散射噪声引起的惩罚。 可能容纳非常紧密的WDM通道间隔。 放大器结构可以以非常低的初始成本和高可靠性，可扩展性和模块化来实现。
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公开(公告)号：US06519080B2
公开(公告)日：2003-02-11
申请号：US09794033
申请日：2001-02-28
IPC分类号： H01S330
CPC分类号： H01S3/06758 , H01S3/06754 , H01S3/0677 , H01S3/094003 , H01S3/094011 , H01S3/1608 , H01S2303/00
摘要： An optical transmission system includes an optical transmitting unit (10) to transmit optical signals in a transmission wavelength band above 1570 nm; an optical receiving unit to receive the optical signals; an optical fiber link optically coupling the transmitting unit to the receiving unit, at least an optical amplifying unit (100) coupled along the link and adapted to amplify the optical signals; the optical amplifying unit (100) having an amplification wavelength band including the transmission wavelength band and comprising: an input (101) for the input of the optical signals, an output (102) for the output of the optical signals, at least an erbium-doped active fiber (103a, 103b) for the amplification of the optical signals, having a first end optically coupled to the input (101) and a second end optically coupled to the output (102), a pump source (104, 106) for generating a pump radiation having a wavelength greater than 1400 nm and lower than 1470 nm, and an optical coupler (105, 107) optically coupling the pump source (104) to the active fiber (103a, 103b).
摘要翻译： 光传输系统包括：光传输单元（10），用于传输1570nm以上的传输波段的光信号; 光接收单元，用于接收光信号; 至少一个光纤放大单元（100），其沿着所述链路耦合并适于放大所述光信号; 所述光放大单元（100）具有包括所述透射波长带的放大波长带，并且包括：用于输入所述光信号的输入（101），用于输出所述光信号的输出（102），至少铒 用于放大光信号的有源光纤（103a，103b），具有光耦合到输入端（101）的第一端和光耦合到输出端（102）的第二端，泵浦源（104,106） 用于产生波长大于1400nm且低于1470nm的泵浦辐射;以及将泵浦源（104）光学耦合到有源光纤（103a，103b）的光耦合器（105,107）。
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5.发明授权Looped optical network with ASE light recirculation and link and network survivability control system 失效环光光网络采用ASE光循环和链路和网络生存性控制系统公开(公告)号：US07417790B2
公开(公告)日：2008-08-26
申请号：US10571506
申请日：2004-09-10
IPC分类号： H01S3/00
CPC分类号： H04B10/27 , H04B10/275
摘要： A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a λLINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
摘要翻译： 环路WDM光网络包括在环路（11）的部分之间的光放大器（12,16）和环路中的ASE再循环的光环路。 在循环的一个点，激光束被注入并允许在环路中循环，激光束以波长为中心的波长为中心，期望产生激光峰。 这在节段损耗变化方面提供了很高的网络强度，并大大提高了WDM信号的OSNR。 高网络生存性也是可以实现的。
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公开(公告)号：US20060126998A1
公开(公告)日：2006-06-15
申请号：US11276280
申请日：2006-02-22
IPC分类号： G02B6/28
CPC分类号： H04B10/2525 , G02B6/02057 , G02B6/2932 , G02B6/29374 , H04B10/2916
摘要： An adaptive dispersion compensation system that also achieves optical amplification by inducing Raman amplification effects in dispersion compensating fiber. This amplification/chromatic dispersion compensation architecture may be applied, e.g., at the end of an all-optical link, or an intermediate points along the link. By varying the length of dispersion compensating fiber used and the pump power, one may accommodate a wide range of dispersion compensation requirements as determined in the field. This scheme also provides all of the advantages typically provided by the use of Raman amplification.
摘要翻译： 一种自适应色散补偿系统，其还通过在色散补偿光纤中诱导拉曼放大效应来实现光放大。 该放大/色散补偿架构可以应用于例如全光链路的末端，或者沿着链路的中间点。 通过改变使用的色散补偿光纤的长度和泵浦功率，可以适应现场所确定的宽范围的色散补偿要求。 该方案还提供了通过使用拉曼放大典型提供的所有优点。
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公开(公告)号：US07024071B1
公开(公告)日：2006-04-04
申请号：US10852847
申请日：2004-05-24
IPC分类号： G02B6/28
CPC分类号： H04B10/2525 , G02B6/02057 , G02B6/2932 , G02B6/29374 , H04B10/2916
摘要： An adaptive dispersion compensation system that also achieves optical amplification by inducing Raman amplification effects in dispersion compensating fiber. This amplification/chromatic dispersion compensation architecture may be applied, e.g., at the end of an all-optical link, or an intermediate points along the link. By varying the length of dispersion compensating fiber used and the pump power, one may accommodate a wide range of dispersion compensation requirements as determined in the field. This scheme also provides all of the advantages typically provided by the use of Raman amplification.
摘要翻译： 一种自适应色散补偿系统，其还通过在色散补偿光纤中诱导拉曼放大效应来实现光放大。 该放大/色散补偿架构可以应用于例如全光链路的末端，或者沿着链路的中间点。 通过改变使用的色散补偿光纤的长度和泵浦功率，可以适应现场所确定的宽范围的色散补偿要求。 该方案还提供了通过使用拉曼放大典型提供的所有优点。
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8.发明授权All-optical gain controlled L-band EDFA structure with reduced four-wave mixing cross-talk 有权全光增益控制L波段EDFA结构，减少了四波混频串扰公开(公告)号：US06437906B1
公开(公告)日：2002-08-20
申请号：US09717005
申请日：2000-11-22
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/06716 , H01S3/094011 , H01S3/102 , H01S3/1608 , H01S2301/02
摘要： An approach for minimizing four-wave mixing (FWM) cross-talk (XT) in a WDM (wavelength division multiplexing) optical communication system is disclosed. An Erbium doped Fiber Amplifier (EDFA) includes a pre-amplifier that receives an input optical signal and outputs an amplified input optical signal. The pre-amplifier includes the following components: a first active fiber that carries WDM signals corresponding to a particular operating band (e.g., L-band); a co-propagating pump laser that induces high inversion in a portion of the first active fiber; a filter that is coupled to the first active fiber and slightly inverts the gain tilt of the WDM signals and suppresses the amplified spontaneous emission (ASE) lights accumulated at wavelengths shorter than the signal bandwidth; a second active fiber that is coupled to the filter; and a counter-propagating pump laser that induces high inversion in a portion of the second active fiber. An optical unit (e.g., an optical add/drop module, a gain equalizing filter (GEF), or a dispersion compensating fiber (DCF)) may be coupled to the pre-amplifier and receives the amplified input signal, in which the optical unit introduces a prescribed loss to the WDM system. A booster amplifier is coupled to the optical unit and is configured to amplify a signal that is output from the optical unit. An automatic optical gain control (AOGC) mechanism of the EDFA provides nearly constant gain that is independent of the number of channels utilized in the WDM system and also minimizes system penalties due to fast relaxation oscillations induced by adding/dropping of channels.
摘要翻译： 公开了一种在WDM（波分复用）光通信系统中最小化四波混频（FWM）串扰（XT）的方法。 掺铒光纤放大器（EDFA）包括前置放大器，其接收输入光信号并输出放大的输入光信号。 前置放大器包括以下组件：承载对应于特定工作频带（例如，L频带）的WDM信号的第一有源光纤; 共同传播的泵激光器，其在第一有源光纤的一部分中引起高反转; 滤波器，耦合到第一有源光纤并稍微反转WDM信号的增益倾斜，并抑制在比信号带宽短的波长处累积的放大的自发发射（ASE）光; 耦合到所述滤波器的第二有源光纤; 以及在第二有源光纤的一部分中引起高反转的反向传播泵激光器。 光学单元（例如，光学分插模块，增益均衡滤波器（GEF）或色散补偿光纤（DCF））可以耦合到前置放大器并接收放大的输入信号，其中光学单元 向WDM系统引入规定的损失。 升压放大器耦合到光学单元，并被配置为放大从光学单元输出的信号。 EDFA的自动光增益控制（AOGC）机制提供几乎恒定的增益，独立于WDM系统中使用的信道数量，并且还可以最大限度地减少因加入/丢弃通道引起的快速弛豫振荡引起的系统惩罚。
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公开(公告)号：US20080297883A1
公开(公告)日：2008-12-04
申请号：US11996354
申请日：2006-07-11
IPC分类号： H01S3/30
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094046 , H01S3/094073 , H01S3/094096 , H01S3/302 , H01S5/12 , H01S5/146
摘要： A Raman amplifier structure (121, 221) for optically amplifying an input optical signal comprises an optical means (22) through which the optical signal is propagated, a first pump optical source (10) for generating a first pump radiation and at least one second pump optical source (24, 27) for generating a second pump radiation. The first and second pump optical radiations are combined and propagated in optical transmission means (22) for supplying an optical amplification of the signal through the Raman effect. The first pump optical source (10) comprises a first laser source (12) for generating a radiation with relatively low noise and relatively low power and a Raman amplifier (13) for amplifying the radiation coming from the first laser source for generating the first pump radiation. The Raman amplifier (13) comprises a second laser source (14) for generating an optical radiation having relatively higher power and noise than the first laser source and the radiation coming from the second laser source is used for counter-pumping the radiation coming from the first laser source (12) for generating the first pump radiation. This limits the amount of noise transferred from the second source (14) to the first pump radiation.
摘要翻译： 用于光学放大输入光信号的拉曼放大器结构（121,221）包括光学信号传播的光学装置（22），用于产生第一泵浦辐射的第一泵浦光源（10）和至少一个第二 泵浦光源（24,27），用于产生第二泵浦辐射。 第一和第二泵浦光辐射在光传输装置（22）中组合和传播，用于通过拉曼效应提供信号的光放大。 第一泵浦光源（10）包括用于产生具有相对较低噪声和相对较低功率的辐射的第一激光源（12）和用于放大来自第一激光源的辐射的拉曼放大器（13），用于产生第一泵 辐射。 拉曼放大器（13）包括用于产生具有比第一激光源相对更高的功率和噪声的光辐射的第二激光源（14），并且来自第二激光源的辐射用于反向泵浦来自 用于产生第一泵浦辐射的第一激光源（12）。 这限制了从第二源（14）传递到第一泵辐射的噪声量。
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公开(公告)号：US07231108B2
公开(公告)日：2007-06-12
申请号：US11276280
申请日：2006-02-22
IPC分类号： G02B6/28
CPC分类号： H04B10/2525 , G02B6/02057 , G02B6/2932 , G02B6/29374 , H04B10/2916
摘要： An adaptive dispersion compensation system that also achieves optical amplification by inducing Raman amplification effects in dispersion compensating fiber. This amplification/chromatic dispersion compensation architecture may be applied, e.g., at the end of an all-optical link, or an intermediate points along the link. By varying the length of dispersion compensating fiber used and the pump power, one may accommodate a wide range of dispersion compensation requirements as determined in the field. This scheme also provides all of the advantages typically provided by the use of Raman amplification.
摘要翻译： 一种自适应色散补偿系统，其还通过在色散补偿光纤中诱导拉曼放大效应来实现光放大。 该放大/色散补偿架构可以应用于例如全光链路的末端，或者沿着链路的中间点。 通过改变使用的色散补偿光纤的长度和泵浦功率，可以适应现场所确定的宽范围的色散补偿要求。 该方案还提供了通过使用拉曼放大典型提供的所有优点。
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