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公开(公告)号：US07680420B1
公开(公告)日：2010-03-16
申请号：US10872850
申请日：2004-06-21
申请人： Dave Walker , Kim B. Roberts , Maurice O'Sullivan , Leo Strawczynski , James Whiteaway , Christopher Fludger , Han Henry Sun , Adrien Comeau
发明人： Dave Walker , Kim B. Roberts , Maurice O'Sullivan , Leo Strawczynski , James Whiteaway , Christopher Fludger , Han Henry Sun , Adrien Comeau
IPC分类号： H04B10/00
CPC分类号： H04B10/5051 , H04B10/25137
摘要： A method of synthesizing a modulated optical signal using a laser cascaded with an amplitude modulator. A phase drive signal VF(t) is derived for driving the laser to generate an optical carrier signal with a desired phase φ(t). An amplitude drive signal VS(t) is then derived for driving the amplitude modulator to impose a desired amplitude S(t) onto the optical carrier signal generated by the laser. The amplitude drive signal VS(t) is compensated for amplitude modulation of the optical carrier signal generated by the laser.
摘要翻译： 使用与幅度调制器级联的激光来合成调制光信号的方法。 导出相位驱动信号VF（t），用于驱动激光器以产生具有期望相位（t）的光载波信号。 然后导出幅度驱动信号VS（t），用于驱动幅度调制器，以将期望的振幅S（t）施加到由激光器产生的光载波信号上。 振幅驱动信号VS（t）被补偿由激光器产生的光载波信号的幅度调制。
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公开(公告)号：US06556343B1
公开(公告)日：2003-04-29
申请号：US09653985
申请日：2000-09-01
IPC分类号： H01S300
CPC分类号： H01S3/06704 , H01S3/094 , H01S3/094003 , H01S3/094019
摘要： An optical fiber amplifier or laser comprises an optical housing having a diffusive reflective inner surface and at least one opening for receiving pump light. An optical fiber having a doped core is at least partially contained within the optical housing. The optical fiber can be pumped by an optical source without the need for any complex or expensive optical couplers. Lateral illumination of the fiber core with pump light enables many fibers to be pumped by the same pump source, so that a separate dedicated coupler is no longer required to couple the pump light into each optical cable.
摘要翻译： 光纤放大器或激光器包括具有扩散反射内表面的光学壳体和用于接收泵浦光的至少一个开口。 具有掺杂芯的光纤至少部分地包含在光学壳体内。 光纤可以由光源泵浦，而不需要任何复杂或昂贵的光耦合器。 使用泵浦光的光纤芯侧向照明可以使许多光纤被相同的泵浦源泵浦，从而不再需要单独的专用耦合器将泵浦光耦合到每根光缆中。
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公开(公告)号：US08655196B2
公开(公告)日：2014-02-18
申请号：US12920705
申请日：2009-03-03
申请人： Christopher Fludger
发明人： Christopher Fludger
CPC分类号： H04L27/223 , H04B10/677
摘要： This invention relates to a phase control circuit for an optical receiver (1). The phase control circuit (9, 19) comprises a non-linear element (22) and a power detector (24). The non-linear element (22) has a rectifying characteristic, inputs the received electrical signal (7, 17) and provides a rectified signal at its output. The power detector (24) provides an error signal which is used to obtain a phase control signal (5) which is output by the phase control circuit. The invention further relates to a corresponding method for phase control of an optical receiver (1).
摘要翻译： 本发明涉及一种用于光接收器（1）的相位控制电路。 相位控制电路（9,19）包括非线性元件（22）和功率检测器（24）。 非线性元件（22）具有整流特性，输入接收的电信号（7,17），并在其输出端提供整流信号。 功率检测器（24）提供用于获得由相位控制电路输出的相位控制信号（5）的误差信号。 本发明还涉及一种用于光接收器（1）的相位控制的相应方法。
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公开(公告)号：US20110006825A1
公开(公告)日：2011-01-13
申请号：US12920705
申请日：2009-03-03
申请人： Christopher Fludger
发明人： Christopher Fludger
IPC分类号： H03H11/16
CPC分类号： H04L27/223 , H04B10/677
摘要： This invention relates to a phase control circuit for an optical receiver (1). The phase control circuit (9, 19) comprises a non-linear element (22) and a power detector (24). The non-linear element (22) has a rectifying characteristic, inputs the received electrical signal (7, 17) and provides a rectified signal at its output. The power detector (24) provides an error signal which is used to obtain a phase control signal (5) which is output by the phase control circuit. The invention further relates to a corresponding method for phase control of an optical receiver (1).
摘要翻译： 本发明涉及一种用于光接收器（1）的相位控制电路。 相位控制电路（9,19）包括非线性元件（22）和功率检测器（24）。 非线性元件（22）具有整流特性，输入接收的电信号（7,17），并在其输出端提供整流信号。 功率检测器（24）提供用于获得由相位控制电路输出的相位控制信号（5）的误差信号。 本发明还涉及一种用于光接收器（1）的相位控制的相应方法。
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公开(公告)号：US20120121274A1
公开(公告)日：2012-05-17
申请号：US13322938
申请日：2010-07-16
申请人： Christopher Fludger
发明人： Christopher Fludger
IPC分类号： H04B10/06
CPC分类号： H04B10/6165 , H04B10/61 , H04B10/611 , H04B10/614 , H04L25/03057
摘要： A receiver for an optical communications system which corrects distortion of a received signal. A clock recovery system utilising a feedback and feedforward system are provided. The feedback loop comprises a phase detector and a clock source, while the feedforward loop comprises the phase detector and a delay element for delaying the output of distortion correction system. The feedback loop has a significantly lower bandwidth than the feedforward path. There are also provided methods of optimising tap weights and of acquiring initial tap weights.
摘要翻译： 一种用于校正接收信号失真的光通信系统的接收机。 提供了一种利用反馈和前馈系统的时钟恢复系统。 反馈回路包括相位检测器和时钟源，而前馈回路包括相位检测器和用于延迟失真校正系统的输出的延迟元件。 反馈回路具有比前馈路径显着更低的带宽。 还提供了优化抽头权重和获取初始抽头权重的方法。
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公开(公告)号：US09419726B2
公开(公告)日：2016-08-16
申请号：US13322938
申请日：2010-07-16
申请人： Christopher Fludger
发明人： Christopher Fludger
CPC分类号： H04B10/6165 , H04B10/61 , H04B10/611 , H04B10/614 , H04L25/03057
摘要： A receiver for an optical communications system which corrects distortion of a received signal. A clock recovery system utilizing a feedback and feedforward system are provided. The feedback loop comprises a phase detector and a clock source, while the feedforward loop comprises the phase detector and a delay element for delaying the output of distortion correction system. The feedback loop has a significantly lower bandwidth than the feedforward path. There are also provided methods of optimizing tap weights and of acquiring initial tap weights.
摘要翻译： 一种用于校正接收信号失真的光通信系统的接收机。 提供了一种利用反馈和前馈系统的时钟恢复系统。 反馈回路包括相位检测器和时钟源，而前馈回路包括相位检测器和用于延迟失真校正系统的输出的延迟元件。 反馈回路具有比前馈路径显着更低的带宽。 还提供了优化抽头权重和获取初始抽头权重的方法。
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公开(公告)号：US07209670B2
公开(公告)日：2007-04-24
申请号：US10425810
申请日：2003-04-29
IPC分类号： H04B10/06 , H04B10/156
CPC分类号： H04B10/2569 , H04B10/67 , H04B10/69
摘要： A polarization diversity receiver has an optical section for converting the received optical signal into four or five polarization diverse component optical signals that substantially represent amplitude and polarization state information of the received optical signal, by respective polarization transformations to respective points on a Poincaré sphere, the points being equally spaced apart to maximize polarization diversity, even in the worst case input polarization state. Detectors produce component electrical signals from each of the component optical signals, for electronic processing to compensate for PMD. By reducing the number of component optical signals significant cost and size reductions are enabled. The need for precise polarization tracking in the receiver can be reduced or eliminated completely. Balanced detectors can be used to reduce the number of electrical signals. The electrical processing can use sequence detection.
摘要翻译： 偏振分集接收机具有光学部分，用于通过相应的极化转换到Poincaré球上的各个点，将接收的光信号转换成基本上表示接收的光信号的振幅和偏振状态信息的四或五个偏振分量分量光信号， 即使在最差情况下输入极化状态，点间距相等以最大化极化分集。 检测器从每个分量光信号产生分量电信号，用于电子处理以补偿PMD。 通过减少组件光信号的数量，可以显着降低成本和尺寸。 在接收机中对精确的极化跟踪的需要可以被完全减少或消除。 平衡检测器可用于减少电信号的数量。 电气处理可以使用序列检测。
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公开(公告)号：US06674566B2
公开(公告)日：2004-01-06
申请号：US09850760
申请日：2001-05-08
申请人： Christopher Fludger , Nigel Jolley
发明人： Christopher Fludger , Nigel Jolley
IPC分类号： H01S330
CPC分类号： H04B10/2916 , H01S3/302
摘要： An optical transmission system comprising a first optical waveguide suitable for transmitting a first information signal, a second optical waveguide suitable for transmitting a second information signal, and input means for providing an electro magnetic radiation signal into said first waveguide, said signal being suitable for providing Raman amplification of the information signals, the system further comprising an optical coupling between said waveguides, arranged to transmit at least a portion of the Raman amplification signal from the first waveguide to the second whilst substantially blocking the transmission of the information signals between the waveguides.
摘要翻译： 一种光传输系统，包括适于发送第一信息信号的第一光波导，适于发送第二信息信号的第二光波导和用于向所述第一波导提供电磁辐射信号的输入装置，所述信号适于提供 信号信号的拉曼放大，所述系统还包括所述波导之间的光耦合，布置成将拉曼放大信号的至少一部分从第一波导传输到第二波导，同时基本上阻挡波导之间的信息信号的传输。
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