公开(公告)号：US08422883B2

公开(公告)日：2013-04-16

申请号：US12576304

申请日：2009-10-09

申请人： Chien-Hung Yeh ,  Chi-Wai Chow ,  Sien Chi

发明人： Chien-Hung Yeh ,  Chi-Wai Chow ,  Sien Chi

IPC分类号： H04B10/00 ,  H04J14/00

CPC分类号： H04B10/25759

摘要： A head-end circuit comprises first and second continuous light sources, first and second modulators. The first and the second continuous light sources provide first and second optical signals respectively corresponding to first wavelength and second wavelength, which is different from the first wavelength. The first modulator modulates the first optical signal based on first clock signal to generate an optical clock signal. The second modulator modulates the second optical signal based on downlink data to generate optical downlink data with the carrier of the second optical signal. The optical clock signal and the optical down link data are outputted to a remote antenna unit via first fiber path.

摘要翻译： 前端电路包括第一和第二连续光源，第一和第二调制器。 第一和第二连续光源提供分别对应于与第一波长不同的第一波长和第二波长的第一和第二光信号。 第一调制器基于第一时钟信号调制第一光信号以产生光时钟信号。 第二调制器基于下行链路数据来调制第二光信号，以产生具有第二光信号的载波的光下行数据。 光时钟信号和光下行链路数据经由第一光纤路径输出到远程天线单元。

公开(公告)号：US08364039B2

公开(公告)日：2013-01-29

申请号：US12645416

申请日：2009-12-22

申请人： Chien-Hung Yeh ,  Chi-Wai Chow

发明人： Chien-Hung Yeh ,  Chi-Wai Chow

IPC分类号： H04J14/00

CPC分类号： H04B10/2587 ,  H04J14/0282 ,  H04J2014/0253

摘要： An optical network and an optical signal modulation method thereof are provided. The optical network includes an optical fiber and a remote node (RN). The RN receives a continuous carrier wave from the optical fiber and modulates the continuous carrier wave to generate a first frequency offset carrier wave The frequency of the first frequency offset carrier wave is different from that of the continuous carrier wave. A first user device re-modulates and loads data to the first frequency offset carrier wave to generate a first upstream signal. The frequency of the first upstream signal is the same as that of the first frequency offset carrier wave. The RN inputs the first upstream signal into the optical fiber.

摘要翻译： 提供了一种光网络及其光信号调制方法。 光网络包括光纤和远程节点（RN）。 RN从光纤接收连续载波，对连续载波进行调制，生成第一频偏载波第一频偏载波的频率与连续载波的频率不同。 第一用户设备将数据重新调制并加载到第一频偏载波以产生第一上行信号。 第一上行信号的频率与第一频率偏移载波的频率相同。 RN将第一上行信号输入到光纤中。

公开(公告)号：US20120328295A1

公开(公告)日：2012-12-27

申请号：US13276042

申请日：2011-10-18

申请人： Chien-Hung Yeh ,  Chi-Wai Chow

发明人： Chien-Hung Yeh ,  Chi-Wai Chow

IPC分类号： H04B10/12

CPC分类号： H04J14/0246 ,  H04B10/2537 ,  H04B10/25754 ,  H04B10/2587 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04J2014/0253

摘要： An optical fiber communication system is provided, including a central office and an optical network unit. The central office generates a first downstream signal and a second downstream signal according to a radio frequency signal and a baseband signal, respectively. The optical network unit is coupled to the central office to receive the first downstream signal and the second downstream signal through a first fiber and a second fiber different from the first fiber, respectively, such that the optical network unit only modulates the second downstream signal to generate an upstream signal and then delivers the upstream signal to the central office through the first fiber, thereby decreasing signal Rayleigh backscatter noise.

摘要翻译： 提供了一种光纤通信系统，包括中心局和光网络单元。 中心局分别根据射频信号和基带信号产生第一下行信号和第二下行信号。 光网络单元耦合到中心局，以通过分别与第一光纤不同的第一光纤和第二光纤分别接收第一下行信号和第二下行信号，使得光网络单元仅将第二下行信号调制为 产生上行信号，然后通过第一条光纤将上行信号传送到中心局，从而降低信号瑞利反向散射噪声。

公开(公告)号：US20100111543A1

公开(公告)日：2010-05-06

申请号：US12531048

申请日：2008-03-13

申请人： Chi Wai Chow ,  Giuseppe Talli ,  Andrew Ellis ,  Paul Townsend

发明人： Chi Wai Chow ,  Giuseppe Talli ,  Andrew Ellis ,  Paul Townsend

IPC分类号： H04B10/04

CPC分类号： H04B10/2587

摘要： An optical transmitter is of the reflective modulation type and has a means of generating reflection, a mixer for mixing a data stream and a sub-carrier, and an optical modulator for modulating an optical carrier with the output from the mixer in order to avoid optical beat-interference noise arising from, for example, Rayleigh backscattering. The modulator is in one embodiment of the interferometric type such as a Mach-Zehnder Modulator (MZM) operated to suppress the optical carrier at the transmitter output in order to reduce optical beat interference noise. The modulator preferably implements CSS-AMPSK modulation, which suppresses optical beat noise and achieves strong dispersion tolerance, enabling, for example, 10 Gb/s data transmission over 100 km distance without dispersion compensation. The transmitter may have a duobinary encoder, which encodes the data prior to mixing with the sub-carrier.

摘要翻译： 光发射机具有反射调制型，具有产生反射的装置，用于混合数据流和副载波的混频器以及用于利用混频器的输出调制光载波的光调制器，以避免光 例如由瑞利后向散射引起的干扰噪声。 在诸如Mach-Zehnder调制器（MZM）的干涉式的一个实施例中，调制器被操作以抑制发射机输出处的光载波，以便减少光拍干扰噪声。 调制器优选地实现CSS-AMPSK调制，其抑制光学差拍噪声并且实现强的色散容限，使得能够例如在100km距离上进行10Gb / s的数据传输而没有色散补偿。 发射机可以具有双二进制编码器，其在与子载波混合之前对数据进行编码。

公开(公告)号：US20100183258A1

公开(公告)日：2010-07-22

申请号：US12385229

申请日：2009-04-02

申请人： Chi-Wai Chow ,  Sien Chi ,  Chia-Hsuan Wang ,  Fu-Yuan Shih ,  Chein-Hung Yeh

发明人： Chi-Wai Chow ,  Sien Chi ,  Chia-Hsuan Wang ,  Fu-Yuan Shih ,  Chein-Hung Yeh

IPC分类号： G02B6/00 ,  G02B6/26

CPC分类号： G01D18/00 ,  G01D5/35383 ,  H04B10/2755 ,  H04J14/0283 ,  H04J14/0289 ,  H04J14/0293

摘要： The present invention discloses a fiber sensing system with self-detection mechanism which utilizes a central office to control secondary ring architecture formed by fiber sensor, remote node and optical coupler primarily. The secondary ring architecture is connected serially to form a primary ring architecture. The central office has a tunable laser light source that can deliver the light source to the fiber sensor. Since the fiber sensor has reflective ability, all light source signal sent by the tunable laser light source will be detected and measured by the fiber sensor. Thus central office can detect all signals reflected by the fiber sensor and produce a spectrum for analyzing fault point locations. The present invention can greatly enhance survivability and sensing capacity of all fiber sensors, so that when a fault point caused by environmental change within the fiber, it will not effect the overall operation of the sensing mechanism. The application of fiber sensor can also reduce cost and complexity of the overall fiber network topology.

摘要翻译： 本发明公开了一种具有自检机构的光纤传感系统，主要利用中心局控制由光纤传感器，远端节点和光耦合器形成的二次环结构。 二级环结构串行连接以形成主环结构。 中央办公室有一个可调谐的激光光源，可以将光源传送到光纤传感器。 由于光纤传感器具有反射能力，由可调激光光源发送的所有光源信号将被光纤传感器检测和测量。 因此，中心局可以检测由光纤传感器反射的所有信号，并产生用于分析故障点位置的频谱。 本发明可以大大提高所有光纤传感器的生存能力和传感能力，从而当光纤内部由环境变化引起的故障点时，不会影响传感机构的整体运行。 光纤传感器的应用还可以降低整体光纤网络拓扑的成本和复杂性。

公开(公告)号：US08705968B2

公开(公告)日：2014-04-22

申请号：US13276042

申请日：2011-10-18

申请人： Chien-Hung Yeh ,  Chi-Wai Chow

发明人： Chien-Hung Yeh ,  Chi-Wai Chow

IPC分类号： H04J14/00 ,  H04B10/25

CPC分类号： H04J14/0246 ,  H04B10/2537 ,  H04B10/25754 ,  H04B10/2587 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04J2014/0253

摘要： An optical fiber communication system is provided, including a central office and an optical network unit. The central office generates a first downstream signal and a second downstream signal according to a radio frequency signal and a baseband signal, respectively. The optical network unit is coupled to the central office to receive the first downstream signal and the second downstream signal through a first fiber and a second fiber different from the first fiber, respectively, such that the optical network unit only modulates the second downstream signal to generate an upstream signal and then delivers the upstream signal to the central office through the first fiber, thereby decreasing signal Rayleigh backscatter noise.

摘要翻译： 提供了一种光纤通信系统，包括中心局和光网络单元。 中心局分别根据射频信号和基带信号产生第一下行信号和第二下行信号。 光网络单元耦合到中心局，以通过分别与第一光纤不同的第一光纤和第二光纤分别接收第一下行信号和第二下行信号，使得光网络单元仅将第二下行信号调制为 产生上行信号，然后通过第一条光纤将上行信号传送到中心局，从而降低信号瑞利反向散射噪声。

公开(公告)号：US08582930B2

公开(公告)日：2013-11-12

申请号：US13238528

申请日：2011-09-21

申请人： Chien-Hung Yeh ,  Chi-Wai Chow

发明人： Chien-Hung Yeh ,  Chi-Wai Chow

IPC分类号： G02B6/00 ,  G02B6/34 ,  G02B6/26

CPC分类号： H04B10/071

摘要： A fiber sensing system is provided, including a plurality of ring structures, an optical coupler and a switching unit. Each of the ring structures has at least one fiber sensor to receive and reflect a light source signal. The optical coupler is directly connected to the ring structures thereby injecting the light source signal into the ring structures to form a plurality of loops. The switching unit is disposed in a central office having two output terminals coupled to the ring structure respectively by the optical coupler, thereby forming a first path and a second path in the loops, such that the light source signal is injected into the first path and the second path sequentially by the switching unit.

摘要翻译： 提供一种光纤传感系统，包括多个环形结构，光耦合器和开关单元。 每个环形结构具有至少一个光纤传感器以接收和反射光源信号。 光耦合器直接连接到环形结构，从而将光源信号注入到环形结构中以形成多个环。 切换单元设置在中心局，其中两个输出端分别由光耦合器耦合到环形结构，从而在环路中形成第一路径和第二路径，使得光源信号被注入到第一路径中， 第二路径由切换单元依次进行。

公开(公告)号：US20100226653A1

公开(公告)日：2010-09-09

申请号：US12431762

申请日：2009-04-29

申请人： Chien-Hung Yeh ,  Chi-Wai Chow ,  Sien Chi

发明人： Chien-Hung Yeh ,  Chi-Wai Chow ,  Sien Chi

IPC分类号： H04B10/00

CPC分类号： H04B10/25754

摘要： A circuit for switching a signal path includes a path selection element, a detector, a switch, and a control circuit. A first end and a third end of the path selection element are coupled to the detector and the switch, respectively. The switch is normally in a conductive status for outputting an upload signal through the path selection element and the switch when the upload signal is input from a second end of the path selection element. When a download signal is transmitted to the detector, the detector transmits the download signal to the path selection element and enables a detection signal. The control circuit switches the switch status to an open-circuit status for outputting the download signal isolated by the switch from the second end of the path selection element. Until the download signal is transmitted completely, the control circuit switches the switch status to the conductive status.

摘要翻译： 用于切换信号路径的电路包括路径选择元件，检测器，开关和控制电路。 路径选择元件的第一端和第三端分别耦合到检测器和开关。 当从路径选择元件的第二端输入上传信号时，该开关通常处于用于通过路径选择元件和开关输出上传信号的导通状态。 当下载信号被发送到检测器时，检测器将下载信号发送到路径选择元件并使能检测信号。 控制电路将开关状态切换到开路状态，以从路径选择元件的第二端输出由开关隔离的下载信号。 直到下载信号完全传输，控制电路将开关状态切换到导通状态。

公开(公告)号：US20130330089A1

公开(公告)日：2013-12-12

申请号：US13603066

申请日：2012-09-04

申请人： Chi-Wai Chow ,  Chien-Hung Yeh ,  Yu-Feng Liu ,  Po-Yen Huang

发明人： Chi-Wai Chow ,  Chien-Hung Yeh ,  Yu-Feng Liu ,  Po-Yen Huang

IPC分类号： H04B10/02

CPC分类号： H04B10/116

摘要： A background noise-immune LED-based communication device comprises at least one LED signal transmitter emitting a Manchester code signal generated by a Manchester coding technology; and at least one optical receiver receiving the Manchester code signal from the LED signal transmitter. The present invention applies the Manchester coding technology to visible-light communication devices, enabling the LED-based communication device to transmit the Manchester code signal, whereby is decreased noise and promoted signal quality.

摘要翻译： 基于背景噪声的基于LED的通信设备包括至少一个发射曼彻斯特编码技术产生的曼彻斯特码信号的LED信号发射器; 以及至少一个光接收器，接收来自LED信号发射器的曼彻斯特码信号。 本发明将曼彻斯特编码技术应用于可见光通信设备，使得基于LED的通信设备能够发送曼彻斯特码信号，从而降低噪声并提高信号质量。

公开(公告)号：US20120328231A1

公开(公告)日：2012-12-27

申请号：US13238528

申请日：2011-09-21

申请人： Chien-Hung YEH ,  Chi-Wai Chow

发明人： Chien-Hung YEH ,  Chi-Wai Chow

IPC分类号： G02B6/00

CPC分类号： H04B10/071

摘要： A fiber sensing system is provided, including a plurality of ring structures, an optical coupler and a switching unit. Each of the ring structures has at least one fiber sensor to receive and reflect a light source signal. The optical coupler is directly connected to the ring structures thereby injecting the light source signal into the ring structures to form a plurality of loops. The switching unit is disposed in a central office having two output terminals coupled to the ring structure respectively by the optical coupler, thereby forming a first path and a second path in the loops, such that the light source signal is injected into the first path and the second path sequentially by the switching unit.

摘要翻译： 提供一种光纤传感系统，包括多个环形结构，光耦合器和开关单元。 每个环形结构具有至少一个光纤传感器以接收和反射光源信号。 光耦合器直接连接到环形结构，从而将光源信号注入到环形结构中以形成多个环。 切换单元设置在中心局，其中两个输出端分别由光耦合器耦合到环形结构，从而在环路中形成第一路径和第二路径，使得光源信号被注入到第一路径中， 第二路径由切换单元依次进行。