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    • 4. 发明申请
    • UNDERSEA BRANCHING UNIT FOR AN UNDERSEA OPTICAL TRANSMISSION SYSTEM
    • 下属光学传输系统的分支机构
    • WO2005037642A3
    • 2005-07-07
    • PCT/US2004034222
    • 2004-10-15
    • RED SKY SYSTEMS INCNAGEL JONATHAN ATAYLOR NIGEL HUNTEVANGELIDES STEPHEN G JR
    • NAGEL JONATHAN ATAYLOR NIGEL HUNTEVANGELIDES STEPHEN G JR
    • B63G20060101G02B6/28G02B6/34H04J14/02
    • H04J14/0201G02B6/29383H04J14/0206H04J14/0217
    • A branching unit is provided for interconnecting at least three undersea optical transmission cables. The branching unit includes first, second and third ports for receiving first, second and third undersea optical transmission cables, respectively. The first and second cables each include an electrical power conductor and a plurality of first optical fibers. The third cable is electrically unpowered and includes at least one drop optical fiber and at least one add optical fiber. An electrical power conductor segment for electrically coupling the conductor in the first cable received in the first port to the conductor in the second cable received in the second port. A first optical fiber segment optically couples a first of the plurality of first optical fibers in one of the first or second cables to the drop optical fiber of the third cable. A second optical fiber segment optically couples a second of the plurality of first optical fibers in one of the first and second cables to the add optical fiber of the third cable. First and second optical amplifiers are located along the first and second optical fiber segments, respectively so that the first optical amplifier provides optical gain to traffic being dropped on the drop optical fiber of the third cable and the second optical amplifier provides optical gain to traffic being added on the add optical fiber of the third cable. At least one electrically conductive path is provided for supplying electrical energy from at least one of the electrical power conductors to each of the optical amplifiers.
    • 提供分支单元用于互连至少三个海底光传输电缆。 分支单元包括用于分别接收第一,第二和第三海底光传输电缆的第一,第二和第三端口。 第一和第二电缆各自包括电力导体和多个第一光纤。 第三缆线是电无动力的并且包括至少一个分支光纤和至少一个添加光纤。 电源导体段,用于将在第一端口中接收的第一电缆中的导体电耦合到在第二端口中接收的第二电缆中的导体。 第一光纤段将第一或第二电缆之一中的多个第一光纤中的第一光纤光学耦合到第三缆线的分支光纤。 第二光纤段将第一和第二电缆中的一个中的多个第一光纤中的第二光纤光耦合到第三电缆的添加光纤。 第一和第二光放大器分别沿着第一和第二光纤段分别设置,使得第一光学放大器为在第三缆线的分支光纤上落下的业务提供光学增益,而第二光放大器为业务提供光增益 添加在第三根电缆的添加光纤上。 提供至少一个导电路径用于将电能从至少一个电力导体提供给每个光放大器。
    • 6. 发明申请
    • UNDERSEA OPTICAL TRANSMISSION SYSTEM EMPLOYING RAMAN GAIN TO MITIGATE SHALLOW WATER REPAIR PENALTIES
    • 利用雷曼光学传输系统减轻水灾维修罚款
    • WO2005054908A3
    • 2005-08-18
    • PCT/US2004040101
    • 2004-12-01
    • RED SKY SYSTEMS INCEVANGELIDES STEPHEN G JRNAGEL JONATHAN A
    • EVANGELIDES STEPHEN G JRNAGEL JONATHAN A
    • G02B20060101H01S3/00H04B10/17
    • H04B10/2935H04B10/2916
    • In an optical communication system that includes a transmitting terminal, a receiving terminal, and an optical transmission path optically coupling the transmitting and receiving terminals and having at least one rare-earth doped optical amplifier therein, a second optical amplifier is provided The second optical amplifier includes a first portion of the optical transmission path having a first end coupled to the transmitting terminal and a second end coupled to a first of the rare-earth doped optical amplifiers. In addition, the second optical amplifier includes a pump source providing pump energy to the first portion of the optical transmission path at one or more wavelengths that is less than a signal wavelength to provide Raman gain in the first portion at the signal wavelength. After an increase in optical loss in the first portion of the optical transmission path arising from performance of a cable repair thereto, the Raman gain supplied to the optical signal is increased to overcome at least a portion of the increase in optical loss.
    • 在包括发射端子,接收端子和光传输路径的光通信系统中,光传输路径光耦合发射和接收终端并且在其中具有至少一个稀土掺杂的光放大器,提供第二光放大器第二光放大器 包括光传输路径的第一部分,其具有耦合到发射端的第一端和耦合到第一稀土掺杂光放大器的第二端。 此外,第二光放大器包括泵浦源,其在一个或多个小于信号波长的波长处向光传输路径的第一部分提供泵浦能量,以在信号波长的第一部分中提供拉曼增益。 在由于电缆修复的性能引起的光传输路径的第一部分中的光损耗增加之后,增加提供给光信号的拉曼增益以克服光损耗的增加的至少一部分。
    • 9. 发明申请
    • OPTICAL TRANSMISSION SYSTEM EMPLOYING ERBIUM-DOPED OPTICAL AMPLIFIERS AND RAMAN AMPLIFIERS
    • 使用铒掺杂光学放大器和拉曼放大器的光学传输系统
    • WO2004019075A2
    • 2004-03-04
    • PCT/US0326107
    • 2003-08-20
    • RED SKY SYSTEMS INC
    • EVANGELIDES STEPHEN G JRNAGEL JONATHAN AYOUNG MARK K
    • H04B10/17G02B
    • H04B10/2935H04B10/2916
    • In an optical communication system that includes a transmitting terminal, a receiving terminal, and an optical transmission path optically coupling the transmitting and receiving terminals and having at least one rare-earth doped optical amplifier therein, a second optical amplifier is provided The second optical amplifier includes a first portion of the optical transmission path having a first end coupled to the transmitting terminal and a second end coupled to a first of the rare-earth doped optical amplifiers. In addition, the second optical amplifier includes a pump source providing pump energy to the first portion of the optical transmission path at one or more wavelengths that is less than a signal wavelength to provide Raman gain in the first portion at the signal wavelength.
    • 在包括发送终端,接收终端和光学耦合发送和接收终端并且其中具有至少一个稀土掺杂光学放大器的光学传输路径的光通信系统中,提供第二光学放大器。第二光学放大器 包括光传输路径的第一部分,其具有耦合到发射端子的第一端和耦合到稀土掺杂光放大器中的第一个的第二端。 另外,第二光放大器包括泵浦源,该泵浦源以小于信号波长的一个或多个波长向光传输路径的第一部分提供泵浦能量,以在信号波长的第一部分提供拉曼增益。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR PROVIDING STAGGERED GROUPWISE DISPERSION COMPENSATION IN A WDM OPTICAL COMMUNICATION SYSTEM
    • 在WDM光通信系统中提供STAGGERED GROUPWISE分散补偿的方法和装置
    • WO2004019503A2
    • 2004-03-04
    • PCT/US0326109
    • 2003-08-20
    • RED SKY SYSTEMS INC
    • EVANGELIDES STEPHEN G JR
    • H04B10/2513H04B
    • H04B10/25133
    • method and apparatus is provided for compensating for dispersion in a WDM optical communication system that includes a transmitter, receiver, and an optical fiber transmission path coupling the transmitter to the receiver. The method begins by imparting dispersion precompensation to a WDM optical signal having a prescribed bandwidth before the WDM optical signal traverses the optical fiber transmission path. The dispersion compensation is provided by first dividing the prescribed bandwidth of the WDM optical signal into a first plurality of sub-bands, and, within each of the first plurality of sub-bands, compensating each wavelength in the sub-band for dispersion by imparting a first fraction of a delay that would be needed to compensate for dispersion at a prescribed wavelength. The prescribed wavelength is equal to an average of the wavelengths located in the sub-band. The first plurality of sub-bands are then recombined to reconstitute the WDM optical signal and the reconstituted WDM optical signal is directed onto the optical fiber transmission path. The method continues by imparting dispersion postcompensation to the WDM optical signal after the WDM optical signal traverses the optical fiber transmission path by dividing the prescribed bandwidth of the WDM optical signal into a second plurality of sub-bands, and, within each of the second plurality of sub-bands, compensating each wavelength in the sub-band for dispersion by imparting a second fraction of a delay that would be needed to compensate for dispersion at a prescribed wavelength. The prescribed wavelength is equal to an average of the wavelengths located in the sub-band. The wavelengths in the sub-bands of the first plurality of sub-bands do not form a one-to-one correspondence to the wavelengths in the sub-bands of the second plurality of sub-bands.
    • 提供了一种用于补偿WDM光通信系统中的色散的方法和装置,其包括发射机,接收机和将发射机耦合到接收机的光纤传输路径。 该方法通过在WDM光信号穿过光纤传输路径之前向具有规定带宽的WDM光信号赋予色散预补偿。 通过首先将WDM光信号的规定带宽划分成第一多个子带,并且在第一多个子带内的每一个子带内,通过赋予子带中的每个波长来补偿色散来提供色散补偿 需要补偿在规定波长的色散的延迟的第一部分。 规定的波长等于位于子带中的波长的平均值。 然后将第一多个子带重新组合以重构WDM光信号,并且重构的WDM光信号被引导到光纤传输路径上。 在通过将WDM光信号的规定带宽分割为第二多个子带之后,WDM光信号穿过光纤传输路径之后,通过对WDM光信号进行色散补偿来继续该方法,并且在第二多个子带内 的子带,通过赋予补偿在规定波长的色散所需的延迟的第二部分来补偿子带中的每个波长以进行色散。 规定的波长等于位于子带中的波长的平均值。 第一多个子带的子带中的波长与第二多个子带的子带中的波长不成一一对应。