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1. 发明申请

WO2008136992A2 METHOD AND APPARATUS FOR LOW CHIRP TRANSMITTER FOR OPTICAL FIBER COMMUNICATIONS 审中-公开
标题翻译：用于光纤通信的低温发射机的方法和装置
公开(公告)号：WO2008136992A2
公开(公告)日：2008-11-13
申请号：PCT/US2008/005547
申请日：2008-04-29
申请人： INNOTRANS COMMUNICATIONS, INC , RAMACHANDRAN, Mani , GYSEL, Herman , JASTI, Chandra
发明人： RAMACHANDRAN, Mani , GYSEL, Herman , JASTI, Chandra
IPC分类号： H04B10/155
CPC分类号： H04B10/504 , H04B10/2537 , H04B10/25751 , H04B10/505 , H04B10/50597 , H04B10/506 , H04B10/58
摘要： A directly modulated optical transmitter for use with a fiber optical communications system operating in the 1550 nm wavelength band exhibits very low chirp. The chirp inherently present in a directly modulated laser is cancelled by a phase modulator which optically modulates the directly modulated laser light beam by applying a 180° phase delay to a split-off portion of the input radio frequency signal. This provides a low cost transmitter capable of operating in the 1550 nm band and with laser chirp effectively cancelled or substantially reduced, thereby avoiding distortions due to laser chirp interactions with the downstream optical fiber.
摘要翻译：与在1550nm波长带中工作的光纤通信系统一起使用的直接调制光发射机表现出非常低的啁啾。固有地存在于直接调制的激光器中的啁啾被相位调制器抵消，相位调制器通过对输入射频信号的分离部分施加180°的相位延迟来对直接调制的激光束进行光学调制。这提供了能够在1550nm波段工作的低成本发射器，并且激光啁啾被有效地消除或显着降低，从而避免了由于与下游光纤的激光啁啾相互作用而引起的失真。

2. 发明申请

WO2004072690A3 OPTICAL SWITCH HAVING AN AUTORESTORATION FEATURE FOR SWITCHING FROM A BACKUP OPTICAL PATH TO A PRIMARY OPTICAL PATH 审中-公开
标题翻译：具有用于从备用光路切换到主光路的自动特征的光开关
公开(公告)号：WO2004072690A3
公开(公告)日：2006-02-23
申请号：PCT/US2004003538
申请日：2004-02-06
申请人： GEN INSTRUMENT CORP , JASTI CHANDRA SEKHAR
发明人： JASTI CHANDRA SEKHAR
IPC分类号： G02B6/28 , G02B6/42 , H04B10/00 , G02B6/26
CPC分类号： H04B10/032 , G02B6/2852 , G02B6/4214
摘要： Optical switches (210, 220) are provided in an optical transmission system having at least two optical nodes in optical communication over a primary optical path (212) and a backup optical path (214). An optical switch (210, 220) is located in each of the optical nodes. Each of the optical switches (210, 220) includes a switching element (216, 224) having an input port and a plurality of output ports coupled to the primary (212) and backup (214) optical paths, respectively. The switching element has a first state optically coupling an optical signal from the input port to the primary path (212) and a second state optically coupling an optical signal from the input port to the backup path (214). First and second optical taps (230, 218) are located in the primary optical path. Third and fourth optical taps (232, 217) are located in the backup optical path. A first photodetector (222) is optically coupled to the second optical tap (218) for receiving a portion of the optical signal traveling in the primary optical path (212). A second photodetector (221) is optically coupled to the third optical tap (217) for receiving a portion of the optical signal traveling in the secondary optical path (214). A first optical path (234) optically couples the first optical tap (230) to the fourth optical tap (232) such that a portion of an optical signal traveling in the secondary path (214) is coupled onto the primary path. Finally, a controller (223) is electrically coupled to each of the optical switches. The controller (223) is configured so that when each of the switching elements are in the second state and the first photodetector (222, 228) in each of the optical switches detects an optical signal, the controller (223) returns the switching elements to the first state.
摘要翻译：光开关（210,220）设置在具有在主光路（212）和备用光路（214）上的光通信中的至少两个光节点的光传输系统中。光开关（210,220）位于每个光节点中。每个光开关（210,220）包括具有输入端口和耦合到主（212）和备用（214）光路的多个输出端口的开关元件（216,224）。开关元件具有将来自输入端口到主路径（212）的光信号光耦合的第一状态和将光信号从输入端口光学耦合到备用通路（214）的第二状态。第一和第二光学抽头（230,218）位于主光路中。第三和第四光学抽头（232,217）位于备用光路中。第一光电检测器（222）光学耦合到第二光学抽头（218），用于接收在主光路（212）中行进的光信号的一部分。第二光电检测器（221）光耦合到第三光学抽头（217），用于接收在次级光路（214）中行进的光信号的一部分。第一光路（234）将第一光学抽头（230）光耦合到第四光学抽头（232），使得在次要路径（214）中行进的光信号的一部分耦合到主路径上。最后，控制器（223）电耦合到每个光开关。控制器（223）被配置为当每个开关元件处于第二状态并且每个光开关中的第一光电检测器（222,228）检测到光信号时，控制器（223）将开关元件返回到第一个状态。

3. 发明申请

WO2008136992A3 METHOD AND APPARATUS FOR LOW CHIRP TRANSMITTER FOR OPTICAL FIBER COMMUNICATIONS 审中-公开
标题翻译：用于光纤通信的低温发射机的方法和装置
公开(公告)号：WO2008136992A3
公开(公告)日：2009-02-19
申请号：PCT/US2008005547
申请日：2008-04-29
申请人： INNOTRANS COMMUNICATIONS INC , RAMACHANDRAN MANI , GYSEL HERMAN , JASTI CHANDRA
发明人： RAMACHANDRAN MANI , GYSEL HERMAN , JASTI CHANDRA
IPC分类号： H04B10/155
CPC分类号： H04B10/504 , H04B10/2537 , H04B10/25751 , H04B10/505 , H04B10/50597 , H04B10/506 , H04B10/58
摘要： A directly modulated optical transmitter for use with a fiber optical communications system operating in the 1550 nm wavelength band exhibits very low chirp. The chirp inherently present in a directly modulated laser is cancelled by a phase modulator which optically modulates the directly modulated laser light beam by applying a 180° phase delay to a split-off portion of the input radio frequency signal. This provides a low cost transmitter capable of operating in the 1550 nm band and with laser chirp effectively cancelled or substantially reduced, thereby avoiding distortions due to laser chirp interactions with the downstream optical fiber.
摘要翻译：与在1550nm波长带中工作的光纤通信系统一起使用的直接调制光发射机表现出非常低的啁啾。固有地存在于直接调制的激光器中的啁啾被相位调制器抵消，相位调制器通过对输入射频信号的分离部分施加180°的相位延迟来对直接调制的激光束进行光学调制。这提供了能够在1550nm波段工作的低成本发射器，并且激光啁啾被有效地消除或显着降低，从而避免了由于与下游光纤的激光啁啾相互作用而引起的失真。

4. 发明申请

WO2004072690A2 OPTICAL SWITCH HAVING AN AUTORESTORATION FEATURE FOR SWITCHING FROM A BACKUP OPTICAL PATH TO A PRIMARY OPTICAL PATH 审中-公开
标题翻译：具有用于从备用光路切换到主光路的自动特征的光学开关
公开(公告)号：WO2004072690A2
公开(公告)日：2004-08-26
申请号：PCT/US2004/003538
申请日：2004-02-06
申请人： GENERAL INSTRUMENT CORPORATION , JASTI, Chandra, Sekhar
发明人： JASTI, Chandra, Sekhar
IPC分类号： G02B
CPC分类号： H04B10/032 , G02B6/2852 , G02B6/4214
摘要： Optical switches (210, 220) are provided in an optical transmission system having at least two optical nodes in optical communication over a primary optical path (212) and a backup optical path (214). An optical switch (210, 220) is located in each of the optical nodes. Each of the optical switches (210, 220) includes a switching element (216, 224) having an input port and a plurality of output ports coupled to the primary (212) and backup (214) optical paths, respectively. The switching element has a first state optically coupling an optical signal from the input port to the primary path (212) and a second state optically coupling an optical signal from the input port to the backup path (214). First and second optical taps (230, 218) are located in the primary optical path. Third and fourth optical taps (232, 217) are located in the backup optical path. A first photodetector (222) is optically coupled to the second optical tap (218) for receiving a portion of the optical signal traveling in the primary optical path (212). A second photodetector (221) is optically coupled to the third optical tap (217) for receiving a portion of the optical signal traveling in the secondary optical path (214). A first optical path (234) optically couples the first optical tap (230) to the fourth optical tap (232) such that a portion of an optical signal traveling in the secondary path (214) is coupled onto the primary path. Finally, a controller (223) is electrically coupled to each of the optical switches. The controller (223) is configured so that when each of the switching elements are in the second state and the first photodetector (222, 228) in each of the optical switches detects an optical signal, the controller (223) returns the switching elements to the first state.
摘要翻译：在具有通过主光路（212）和备用光路（214）的光通信中的至少两个光节点的光传输系统中提供光开关（210,220）。光开关（210,220）位于每个光节点中。光开关（210,220）中的每一个包括具有输入端口和耦合到初级（212）和备用（214）光路的多个输出端口的开关元件（216,224）。开关元件具有将来自输入端口到主路径（212）的光学信号光耦合的第一状态和将光学信号从输入端口光学耦合到备用路径（214）的第二状态。第一和第二光学抽头（230,218）位于主光路中。第三和第四光学抽头（232,217）位于备用光路中。第一光电检测器（222）光耦合到第二光学抽头（218），用于接收在主光路（212）中行进的光信号的一部分。第二光电检测器（221）光耦合到第三光学抽头（217），用于接收在次光路（214）中行进的光信号的一部分。第一光路（234）将第一光学抽头（230）光耦合到第四光学抽头（232），使得在辅助路径（214）中行进的光信号的一部分耦合到主路径上。最后，控制器（223）电耦合到每个光开关。控制器（223）被构造成使得当每个开关元件处于第二状态并且每个光开关中的第一光电检测器（222,228）检测到光信号时，控制器（223）将开关元件返回到第一个状态。

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