公开(公告)号：US20080050121A1

公开(公告)日：2008-02-28

申请号：US10870327

申请日：2004-06-17

申请人： Stephen G. Evangelides ,  Jay P. Morreale ,  Michael J. Neubelt ,  Mark K. Young ,  Jonathan A. Nagel ,  David S. DeVincentis

发明人： Stephen G. Evangelides ,  Jay P. Morreale ,  Michael J. Neubelt ,  Mark K. Young ,  Jonathan A. Nagel ,  David S. DeVincentis

IPC分类号： H04B10/00

CPC分类号： H04B10/2935

摘要： A method for entering a market with high barriers to entry and a plurality of proprietary business elements includes converting at least one of the business elements into a universal business element that can accept a wide variety of inputs from other business elements, while converting a remaining one of the plurality of business elements to commoditized business elements. In addition, a market of a resulting business is limited so that the resulting business straddles a gap between two subdivisions of the market. Thus, a combination of technology and market division enables conversion of otherwise proprietary system to commodity equipment that can work with a wide variety of existing vendor equipment while competing technologically with highly engineered solutions. For example as applied to the undersea telecommunications market, one exemplary embodiment of the present invention employs an optical repeater that can accept any existing submarine cable, in combination with an optical line interface terminal that can accept existing terrestrial terminal equipment. Regarding market division, this embodiment is specifically limited to spans of less than 5000 kilometers, and preferably between 350 and 4000 kilometers, thereby straddling both the long-haul and short-haul markets while providing highly desirable services and capability. By selecting this market segment, the embodiment achieves highly desirable economics without the usual concomitant high engineering costs.

摘要翻译： 进入具有高进入门槛的市场和多个专有业务元素的方法包括将至少一个业务元素转换成可以接受来自其他业务元素的各种投入的通用业务元素，同时将剩余的一个 的商业元素。 此外，由此产生的业务的市场有限，因此产生的业务跨越了市场的两个细分市场之间的差距。 因此，技术和市场部门的结合使得可以将其他专有系统转换为可与各种现有供应商设备配合使用的商品设备，同时通过高度设计的解决方案在技术上竞争。 例如，如应用于海底电信市场，本发明的一个示例性实施例采用可以接受任何现有的海底电缆的光中继器，其结合可接受现有地面终端设备的光线路接口终端。 关于市场划分，该实施例特别限于小于5000公里，优选350至4000公里的跨度，从而跨越长途和短途市场，同时提供非常理想的服务和能力。 通过选择这个市场部分，该实施例实现了非常理想的经济性，而没有通常伴随的高工程成本。

公开(公告)号：US20080018990A1

公开(公告)日：2008-01-24

申请号：US11489774

申请日：2006-07-20

申请人： Balakrishnan Sridhar ,  Michael Y. Frankel

发明人： Balakrishnan Sridhar ,  Michael Y. Frankel

IPC分类号： H01S3/00 ,  H04B10/12

CPC分类号： H04B10/0797 ,  H01S3/06758 ,  H01S2301/02 ,  H04B10/2935

摘要： The present invention provides an optical amplifier pre-emphasis and equalization method that alleviates the optical amplifier gain ripple penalty experienced in conventional optical communications systems. This method includes storing measured communications channel signal gain ripple information, acquired during factory calibration, in the internal memory of each optical amplifier module. When the optical amplifiers are assembled into a chain, system software retrieves this communications channel signal gain ripple information from each optical amplifier module and computes the pre-emphasis or equalization required for each channel in order to obtain a flat SNR at a receiver. The method also includes measuring the ambient temperature of each optical amplifier module and applying a correction based on the expected change in gain response of each optical amplifier. The method further includes, for Raman amplifiers and the like, applying a fiber type, gain setting, GFF error, etc. correction based on the expected change in gain response of each optical amplifier. The method relies on using VOAs at the sources or DGEs/RBFs in the optical signal path to pre-emphasize or equalize the optical channels.

公开(公告)号：US20070247703A1

公开(公告)日：2007-10-25

申请号：US11799804

申请日：2007-05-03

申请人： David Smith ,  Thomas Stephens

发明人： David Smith ,  Thomas Stephens

IPC分类号： H04B10/12

CPC分类号： H04B10/2935

摘要： Optical transmission systems including a plurality of optical amplifiers configured to provide optical amplification of one or more information carrying optical signal wavelengths. At least two of the optical amplifiers are operated to provide net losses or net gains along corresponding spans, while the cumulative gain provided by the plurality of optical amplifiers substantially compensates for the cumulative loss of the spans.

摘要翻译： 光传输系统包括多个光放大器，被配置为提供一个或多个携带光信号波长的信息的光放大。 操作至少两个光放大器以沿着相应跨度提供净损耗或净增益，而由多个光放大器提供的累积增益基本上补偿了跨度的累积损耗。

公开(公告)号：US20070211332A1

公开(公告)日：2007-09-13

申请号：US11800023

申请日：2007-05-03

申请人： David Smith ,  Thomas Stephens

发明人： David Smith ,  Thomas Stephens

IPC分类号： H04B10/12

CPC分类号： H04B10/2935

摘要： Optical transmission systems including a plurality of optical amplifiers configured to provide optical amplification of one or more information carrying optical signal wavelengths. At least two of the optical amplifiers are operated to provide net losses or net gains along corresponding spans, while the cumulative gain provided by the plurality of optical amplifiers substantially compensates for the cumulative loss of the spans.

公开(公告)号：US20070188851A1

公开(公告)日：2007-08-16

申请号：US11691012

申请日：2007-03-26

申请人： Mohammed Islam ,  Carl DeWilde

发明人： Mohammed Islam ,  Carl DeWilde

IPC分类号： H01S3/00

CPC分类号： H04J14/0221 ,  H04B10/2916 ,  H04B10/2935

摘要： An optical communication system is operable to communicate a plurality of wavelength signals at a bit rate of at least 9.5 gigabits per second over a multiple span communication link spanning at least 400 kilometers without optical regenerators. The plurality of wavelength signals include a bandwidth of more than 32 nanometers separated into at least 160 optical channels. The system includes a plurality of optical transmitters implementing a forward error correction (FEC) coding technique. The FEC encoded wavelength signals comprise a bit error rate of 10−09 or better after FEC decoding. The system also includes at least five (5) optical add/drop multiplexers (OADMs), each coupled to one or more spans of the multiple span communication link. The system further includes a plurality of amplifiers each coupled to one or more spans of the communication link, at least a majority of the amplifiers comprise a distributed Raman amplification stage.

摘要翻译： 光通信系统可操作以通过跨越至少400公里的多跨度通信链路在不具有光学再生器的情况下以至少9.5千兆比特每秒的比特率来传送多个波长信号。 多个波长信号包括分离成至少160个光学通道的超过32纳米的带宽。 该系统包括实现前向纠错（FEC）编码技术的多个光发射机。 在FEC解码之后，FEC编码的波长信号包括10dB或更好的误码率。 该系统还包括至少五（5）个光分插复用器（OADM），每个耦合到多跨度通信链路的一个或多个跨度。 该系统还包括多个放大器，每个放大器耦合到通信链路的一个或多个跨度，至少大部分放大器包括分布式拉曼放大级。

公开(公告)号：US20070081778A1

公开(公告)日：2007-04-12

申请号：US11239175

申请日：2005-09-29

申请人： Paul Claisse ,  Rene'-Jean Essiambre ,  Wonsuck Lee

发明人： Paul Claisse ,  Rene'-Jean Essiambre ,  Wonsuck Lee

IPC分类号： G02B6/02

CPC分类号： H04B10/2935

摘要： A method includes transmitting optical signals through a heterogeneous sequence of spans of an all-optical transmission line. Each span has an optical transmission fiber connected to an optical amplifier. Each amplifier launches the signals into a sequential remainder of the line. The transmitting includes launching the optical signals into the highest loss fibers with substantially equal average optical launch powers or operating the spans with the highest loss fibers to have substantially equal quality products. The average optical launch powers are substantially equal to the inverse of a sum of (1−Tj)γj/[φNL·αj] over the highest loss fibers. The parameters Tj, γj, and αj are the respectiveare, respectively, transmissivity, nonlinear optical coefficient, and loss coefficient of the fiber of the j-th span. The parameter φNL is the line's cumulative nonlinear phase shift. Each quality product is the per-span optical signal-to-noise ratio of the associated span times the nonlinear phase shift of the associated span.

摘要翻译： 一种方法包括通过全光传输线的异构序列传输光信号。 每个跨距具有连接到光放大器的光传输光纤。 每个放大器将信号发射到该行的连续剩余部分。 发射包括将光信号发射到具有基本相等的平均光发射功率的最高损耗光纤中，或者以最高损耗光纤操作跨度以具有基本相同的质量产品。 平均光发射功率基本上等于（1-T>>）gamma gamma gamma gamma a a pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha pha 在最高损耗的纤维上。 参数T j，j，j，j和j分别分别为光纤的透射率，非线性光学系数和损耗系数 的第j个跨度。 参数phi 是线的累积非线性相移。 每个质量产品是相关跨距的跨跨度光信噪比乘以相关跨度的非线性相移。

公开(公告)号：US07116908B2

公开(公告)日：2006-10-03

申请号：US10076748

申请日：2002-02-13

申请人： Tetsuya Uda ,  Hiroshi Masuda ,  Hirofumi Nakano ,  Eita Miyasaka ,  Satoshi Asamizu

发明人： Tetsuya Uda ,  Hiroshi Masuda ,  Hirofumi Nakano ,  Eita Miyasaka ,  Satoshi Asamizu

IPC分类号： H04J14/02 ,  H04B10/00 ,  H01S3/00 ,  H01B10/12

CPC分类号： H04B10/2935 ,  H04B10/0777 ,  H04B10/2537 ,  H04B10/294 ,  H04J14/02 ,  H04J14/0221

摘要： In the WDM systems, the OSNR and the signal loss among the optical signals are substantially minimized at the receiving terminal to combat the SRS effects. An equal amount of the signal loss is expected for every span in the transmission path so that the optical amplifier gain tilt is not affected among a number of wavelength frequencies in the optical signal. This is accomplished by controlling the amplification process according to a feedback from the monitoring units for monitoring the optical signal.

公开(公告)号：US07081986B2

公开(公告)日：2006-07-25

申请号：US10368031

申请日：2003-02-14

申请人： James E. DeGrange, Jr. ,  Sridhar Balakrishnan

发明人： James E. DeGrange, Jr. ,  Sridhar Balakrishnan

IPC分类号： H01S3/00 ,  H04B10/08

CPC分类号： H04B10/2935 ,  H04B10/0775 ,  H04B2210/078 ,  H04J14/0201 ,  H04J14/0206 ,  H04J14/0221

摘要： The invention includes a method for controlling amplifier output power in an optical communications network having channel add/drop capability. A first transmission parameter and a second transmission parameter are determined at a first amplifier. In an exemplary embodiment, the first transmission parameter is a composite express signal-to-noise ratio and the second transmission parameter is a composite signal-to-noise ratio. The total output power of a downstream amplifier is adjusted in response to the first transmission parameter and second transmission parameter. A system for implementing the method is also disclosed.

公开(公告)号：US20060133822A1

公开(公告)日：2006-06-22

申请号：US11021726

申请日：2004-12-22

申请人： Massimo Manna ,  Ekaterina Golovchenko ,  Mark Enright

发明人： Massimo Manna ,  Ekaterina Golovchenko ,  Mark Enright

IPC分类号： H04B10/16

CPC分类号： H04B10/2935 ,  H04B10/2937

摘要： A communication system including a repeatered trunk path and one or more unrepeatered branch segments coupled to the trunk path through associated submarine branching units. Each of the branch segments may be configured to carry at least the same channel capacity as the trunk path and may have a length greater than the average repeater spacing in the trunk path.

公开(公告)号：US07046426B2

公开(公告)日：2006-05-16

申请号：US10443058

申请日：2003-05-22

申请人： Eddie Kai Ho Ng ,  Colin Geoffrey Kelly

发明人： Eddie Kai Ho Ng ,  Colin Geoffrey Kelly

IPC分类号： H01S3/00 ,  H04B10/00

CPC分类号： H04B10/2933 ,  H04B10/2935

摘要： A method for determining locations and gain settings of optical amplifiers in an optical network is provided. The method comprises evaluating allowable amplifier locations and successively eliminating selected locations until no further locations can be eliminated without the network violating predetermined specifications. This systematic method is applicable to a variety of network topologies and takes into account existing network limitations. In one embodiment, the method for determining the locations and gain settings of the amplifiers uses the amount of operating margin in the network to select locations to be eliminated. In another embodiment, the method is repeated a number of times with different selections of amplifier locations, and the method providing the arrangement with the least number of amplifiers is chosen.

摘要翻译： 提供一种用于确定光网络中的光放大器的位置和增益设置的方法。 该方法包括评估允许的放大器位置并连续地消除所选择的位置，直到没有网络违反预定规格的情况下才能消除其他位置。 该系统方法适用于各种网络拓扑，并考虑到现有的网络限制。 在一个实施例中，用于确定放大器的位置和增益设置的方法使用网络中的操作裕度来选择要消除的位置。 在另一个实施例中，通过不同的放大器位置的选择重复该方法多次，并且选择提供具有最少数量的放大器的布置的方法。