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公开(公告)号：US07308169B2
公开(公告)日：2007-12-11
申请号：US10922690
申请日：2004-08-19
申请人： Sethumadhavan Chandrasekhar , Andrew R. Chraplyvy , Christopher Richard Doerr , Peter J. Winzer
发明人： Sethumadhavan Chandrasekhar , Andrew R. Chraplyvy , Christopher Richard Doerr , Peter J. Winzer
IPC分类号： G02B6/26
CPC分类号： H04B10/2507 , G02B6/266 , H04J14/0221
摘要： A multi-channel optical equalizer for intersymbol interference mitigation compensates for single- or multi-wavelength channels simultaneously and requires few adjustable parameters. The optical equalizer also compensates for overshoots and signal transition degradations in semiconductor optical amplifiers. The equalizer unit uses one control signal for magnitude and one to control signal phase. The equalizer includes a controllable coupling ratio coupler for splitting the light into two portions and a controllable interferometer having two arms, one arm having an additional delay which is equal to an integer multiple of 1/Δf, where Δf is the channel spacing between adjacent wavelengths utilized in the optical system. The controllable interferometer has a controllable delay in a first or second arm for adjusting the relative phase of the light passing therethrough. A coupler combines the two signal portions from the first and second arms to form the equalized output signal. A multistage optical equalizer is implemented using a plurality of optical signal equalizers.
摘要翻译： 用于符号间干扰减轻的多通道光学均衡器同时补偿单波长或多波长通道，并且需要很少的可调参数。 光学均衡器还补偿半导体光放大器中的过冲和信号转换劣化。 均衡器单元使用一个控制信号的幅度和一个来控制信号相位。 均衡器包括可控耦合比耦合器，用于将光分成两部分，以及具有两个臂的可控干涉仪，一个臂具有等于1 / Deltaf的整数倍的附加延迟，其中Deltaf是相邻波长之间的信道间隔 用于光学系统。 可控干涉仪在第一或第二臂中具有可控制的延迟，用于调节通过其中的光的相对相位。 耦合器组合来自第一和第二臂的两个信号部分以形成均衡的输出信号。 使用多个光信号均衡器来实现多级光学均衡器。
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公开(公告)号：US20130136449A1
公开(公告)日：2013-05-30
申请号：US13731738
申请日：2012-12-31
申请人： Xiang Liu , Peter J. Winzer , Andrew R. Chraplyvy , Robert W. Tkach , Chandrasekhar Sethumadhavan
发明人： Xiang Liu , Peter J. Winzer , Andrew R. Chraplyvy , Robert W. Tkach , Chandrasekhar Sethumadhavan
IPC分类号： H04B10/2507
CPC分类号： H04B10/2507 , H04B10/25137 , H04B10/5053 , H04B10/516
摘要： An example apparatus comprises an optical transmitter which includes a first processor and at least two optical modulators. The first processor is configured to generate a first electronic representation for each of at least two optical signals for carrying payload data modulated according to a one-dimensional (1-D) modulation format, and to induce on respective ones of the first electronic representations an amount of dispersion that depends on a power-weighted accumulated dispersion (ADPW) of a transmission link through which the at least two optical signals are to be transmitted thereby generating complex-valued electronic representations of pre-dispersion-compensated optical signals. Each of the at least two optical modulators modulate a respective analog version corresponding to a respective one of the complex-valued electronic representations onto a polarization of an optical carrier.
摘要翻译： 示例性装置包括光发射机，其包括第一处理器和至少两个光调制器。 第一处理器被配置为为至少两个光信号中的每一个生成用于承载根据一维（1-D）调制格式调制的有效载荷数据的第一电子表示，并且在第一电子表示中的相应的一个 取决于要发送至少两个光信号的传输链路的功率加权累积色散（ADPW）的色散量，从而生成预色散补偿光信号的复值电子表示。 所述至少两个光调制器中的每一个将对应于复值电子表示的相应模拟版本调制到光载波的极化。
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3.发明申请公开(公告)号：US20120294607A1
公开(公告)日：2012-11-22
申请号：US13112147
申请日：2011-05-20
CPC分类号： H01S3/094061 , G02B6/02042 , G02B6/02095 , H01S3/06754 , H01S3/094096 , H01S3/2383 , H01S3/302 , H04B10/2912 , H04J14/02 , H04J14/04
摘要： A spatially multiplexed optical link having a plurality of transmission paths, wherein at least one transmission path is configured to carry an optical-pump signal while one or more other transmission paths carry data-bearing signals. Disposed within the optical link are an optical signal-distribution module and an amplifier module. The optical signal-distribution module is configured to couple portions of the optical-pump signal into the data-bearing transmission paths. The amplifier module is configured to amplify the data-bearing signals using these portions of the optical-pump signal as a power source in a suitable all-optical amplification scheme. The optical-pump signal can optionally be tapped and applied to a photovoltaic element configured to directly power a device, e.g., an optical performance monitor, or to charge the battery of that device to enable its autonomous operation if external electrical power is not available where the device is deployed.
摘要翻译： 一种具有多个传输路径的空间复用光链路，其中至少一个传输路径被配置为在一个或多个其它传输路径承载数据承载信号的同时承载光泵信号。 设置在光链路内的是光信号分配模块和放大器模块。 光信号分配模块被配置为将光泵信号的部分耦合到数据承载传输路径中。 放大器模块被配置为以合适的全光放大方案将光泵信号的这些部分放大为数据承载信号作为电源。 光泵信号可以可选地被抽头并且被施加到被配置为直接为设备（例如光学性能监视器）供电的光伏元件，或者对于该设备的电池进行充电，以使得其能够自主操作，如果外部电力不可用， 该设备已部署。
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4.发明授权公开(公告)号：US09438004B2
公开(公告)日：2016-09-06
申请号：US13112147
申请日：2011-05-20
IPC分类号： G02B6/26 , G02B6/34 , G02B6/42 , H01S3/094 , H04B10/291 , H04J14/04 , H01S3/067 , H01S3/23 , H01S3/30 , G02B6/02 , H04J14/02
CPC分类号： H01S3/094061 , G02B6/02042 , G02B6/02095 , H01S3/06754 , H01S3/094096 , H01S3/2383 , H01S3/302 , H04B10/2912 , H04J14/02 , H04J14/04
摘要： A spatially multiplexed optical link having a plurality of transmission paths, wherein at least one transmission path is configured to carry an optical-pump signal while one or more other transmission paths carry data-bearing signals. Disposed within the optical link are an optical signal-distribution module and an amplifier module. The optical signal-distribution module is configured to couple portions of the optical-pump signal into the data-bearing transmission paths. The amplifier module is configured to amplify the data-bearing signals using these portions of the optical-pump signal as a power source in a suitable all-optical amplification scheme. The optical-pump signal can optionally be tapped and applied to a photovoltaic element configured to directly power a device, e.g., an optical performance monitor, or to charge the battery of that device to enable its autonomous operation if external electrical power is not available where the device is deployed.
摘要翻译： 一种具有多个传输路径的空间复用光链路，其中至少一个传输路径被配置为在一个或多个其它传输路径承载数据承载信号的同时承载光泵信号。 设置在光链路内的是光信号分配模块和放大器模块。 光信号分配模块被配置为将光泵信号的部分耦合到数据承载传输路径中。 放大器模块被配置为以合适的全光放大方案将光泵信号的这些部分放大为数据承载信号作为电源。 光泵信号可以可选地被抽头并且被施加到被配置为直接为设备（例如光学性能监视器）供电的光伏元件，或者对于该设备的电池进行充电，以使得其能够自主操作，如果外部电力不可用， 该设备已部署。
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公开(公告)号：US5225922A
公开(公告)日：1993-07-06
申请号：US796512
申请日：1991-11-21
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/13 , H04B10/08 , H04B10/16 , H04B10/17 , H04B10/18 , H04J14/00 , H04J14/02
CPC分类号： H04B10/25073 , H04J14/0221 , H01S2301/04 , H01S3/06754
摘要： Increasing the capacity of an existing lightwave transmission system can be accomplished by either increasing the bit rate or adding wavelength-multiplexed channels. Recent advances in erbium-doped fiber amplifier technology make the wavelength division multiplexed option particularly attractive. Unfortunately, because of nonuniform wavelength-dependent gain profile and saturation characteristic of erbium-doped fiber amplifiers, each channel of a wavelength-multiplexed system will experience a different optical gain which, in turn, can result in an excessive bit-error-rate performance in some channels. This invention is directed toward processing apparatus which selectively equalizes the optical gain or the optical signal-to-noise ratios of the channels of a wavelength-multiplexed optical transmission system. The output powers and the signal-to-noise ratios are selectively equalized by adjusting the optical input signal powers. With this invention, wavelength-multiplexed channels can be added to an existing optical fiber transmission system without requiring new optical components, upgrades or adjustments at intermediate amplifier sites.
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6.发明授权
公开(公告)号：US4908833A
公开(公告)日：1990-03-13
申请号：US303594
申请日：1989-01-27
IPC分类号： H04B10/04 , H01S5/00 , H01S5/06 , H01S5/062 , H01S5/12 , H04B10/06 , H04B10/12 , H04B10/142 , H04B10/152
CPC分类号： H01S5/0622 , H01S5/12 , H01S5/0618 , H01S5/06209 , H01S5/124
摘要： To overcome the deleterious effects of the nonuniform frequency modulation response in semiconductor lasers due to current injection in direct frequency modulation applications, it has been determined that the linewidth enhancement factor .alpha. be made as large as possible. In one embodiment, distributed feedback lasers well suited for frequency modulation lightwave communication systems are designed to have an integrated feedback element such as a corrugation grating whose effective pitch is selected to cause the Bragg wavelength and, therefore, the laser operating wavelength to be longer than the wavelength at substantially the maximum gain or gain peak in the semiconductor structure without the grating. That is, the wavelength of the grating is effectively detuned toward the longer wavelength and lower energy side of the peak of the gain profile. Such detuning increases the linewidth enhancement factor in such a way that the nonuniform frequency modulation response and its effects are minimized and, in some cases, substantially eliminated.
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公开(公告)号：US5587830A
公开(公告)日：1996-12-24
申请号：US69952
申请日：1993-05-28
CPC分类号： H04B10/2525 , H04B10/255 , H04B10/2563
摘要： A high capacity optical fiber network operative with wavelength division multiplexing. Contemplated systems can utilize span distances in excess of 100 km, signal amplification within spans, and provide plural multiplexed channels operative at multiple gigabits per second.
摘要翻译： 具有波分复用功能的大容量光纤网络。 考虑的系统可以利用超过100公里的跨距，跨度内的信号放大，并提供多达多达千兆位/秒的多路复用通道。
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公开(公告)号：US07145715B2
公开(公告)日：2006-12-05
申请号：US10948038
申请日：2004-09-23
摘要： A multi-pump phase modulator apparatus and operating method uses only one phase modulator to eliminate SBS without degrading idler(s). The single phase modulator phase modulates multiple pump signals to form multiple phase modulated pump signals using a modulation signal having a modulation period. A delay apparatus delays a first wavelength group by the modulation period relative to other wavelength groups. A combiner combines the delayed first wavelength group with the other wavelength groups to form a combined modulated multiple pump signal. In one embodiment a multi-pump phase parametric apparatus comprises the multi-pump phase modulator apparatus combined with a parametric apparatus to generate an amplified input signal and one or more idlers. Other embodiments of the multi-pump phase conjugator apparatus are used as part of an Optical Switch, Sampler, Tributary Extractor, and Regenerator.
摘要翻译： 多泵相位调制器装置和操作方法仅使用一个相位调制器来消除SBS而不降低惰轮。 单相调制器相位调制多个泵浦信号，以使用具有调制周期的调制信号形成多个相位调制的泵浦信号。 延迟装置将第一波长组相对于其他波长组延迟调制周期。 组合器将延迟的第一波长组与其它波长组合以形成组合的调制多泵信号。 在一个实施例中，多泵相参数装置包括与参数装置结合以产生放大的输入信号和一个或多个惰轮的多泵相位调制器装置。 多泵相位共轭装置的其他实施例被用作光开关，采样器，支流提取器和再生器的一部分。
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9.发明授权System and method for mitigating cross-saturation in optically amplified networks 失效用于减轻光放大网络中交叉饱和度的系统和方法
公开(公告)号：US5907420A
公开(公告)日：1999-05-25
申请号：US713568
申请日：1996-09-13
申请人： Andrew R. Chraplyvy , John C. Ellson , George W. Newsome , Robert William Tkach , John Lehrer Zyskind
发明人： Andrew R. Chraplyvy , John C. Ellson , George W. Newsome , Robert William Tkach , John Lehrer Zyskind
CPC分类号： H04J14/0221
摘要： A system and method of protecting all the amplifiers in a link between wavelength routing network elements of an optical network. According to the invention, an optical control channel is added before a plurality of optical amplifier, preferably the first amplifier, in a link. To prevent improper loading of downstream links, the control channel is stripped off at the next wavelength routing network element. The power of the control channel is automatically adjusted using a fast feedback circuit to hold substantially constant the total power of the signal channels and the control channel at the input of the first amplifier following the feedback loop. In this manner, channel loading of all optical amplifiers in the link is maintained substantially constant, and the incidence of error bursts, as might otherwise result when one or more channels are added or dropped due to a network fault or reconfiguration, is substantially reduced.
摘要翻译： 一种在光网络的波长路由网络元件之间的链路中保护所有放大器的系统和方法。 根据本发明，在多个光放大器之前，在链路中添加光控制信道，优选地是第一放大器。 为了防止下游链路的不正确加载，控制信道在下一个波长路由网元被剥离。 使用快速反馈电路来自动调整控制通道的功率，以在反馈回路之后保持信号通道和控制通道在第一放大器的输入处的总功率的基本恒定。 以这种方式，链路中的所有光放大器的信道负载保持基本恒定，并且当由于网络故障或重新配置而添加或丢弃一个或多个信道时可能导致的错误突发的发生率显着降低。
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公开(公告)号：US5847862A
公开(公告)日：1998-12-08
申请号：US980849
申请日：1997-11-29
CPC分类号： H04B10/2537 , H04J14/0221
摘要： A significant part of signal-to-noise degradation in WDM optical fiber communications, due to Raman crosstalk, is found to be deterministic in nature. Shaping of amplifier output to offset depletion of high frequency channels improves signal capacity by an order of magnitude.
摘要翻译： 发现由于拉曼串扰导致的WDM光纤通信中的信噪比退化的很大一部分在本质上是确定性的。 放大器输出的整形以抵消高频信道的耗尽，将信号容量提高一个数量级。
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